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    <REQ-IF-HEADER IDENTIFIER="header-se-kids-remote-control-airplane">
      <CREATION-TIME>2026-04-24T18:45:42.106Z</CREATION-TIME>
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      <TITLE>se-kids-remote-control-airplane</TITLE>
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            <ATTRIBUTE-DEFINITION-STRING IDENTIFIER="attr-linkType" LAST-CHANGE="2026-04-24T18:45:42.106Z" LONG-NAME="Link Type">
              <TYPE><DATATYPE-DEFINITION-STRING-REF>string-type</DATATYPE-DEFINITION-STRING-REF></TYPE>
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              <TYPE><DATATYPE-DEFINITION-STRING-REF>string-type</DATATYPE-DEFINITION-STRING-REF></TYPE>
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        </SPEC-RELATION-TYPE>
        <SPECIFICATION-TYPE IDENTIFIER="spec-type" LAST-CHANGE="2026-04-24T18:45:42.106Z" LONG-NAME="Document">
          <SPEC-ATTRIBUTES>
            <ATTRIBUTE-DEFINITION-STRING IDENTIFIER="attr-docName" LAST-CHANGE="2026-04-24T18:45:42.106Z" LONG-NAME="Document Name">
              <TYPE><DATATYPE-DEFINITION-STRING-REF>string-type</DATATYPE-DEFINITION-STRING-REF></TYPE>
            </ATTRIBUTE-DEFINITION-STRING>
          </SPEC-ATTRIBUTES>
        </SPECIFICATION-TYPE>
        <RELATION-GROUP-TYPE IDENTIFIER="linkset-type" LAST-CHANGE="2026-04-24T18:45:42.106Z" LONG-NAME="Document Linkset"/>
      </SPEC-TYPES>
      <SPEC-OBJECTS>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:ARC-REQ-001" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-REQ-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Flight Control Electronics — Integrated receiver, gyro, and mixing on a single PCB rather than discrete modules. Grouping justification: the receiver, gyroscope, and mixing microcontroller share a common 5V power rail, communicate via SPI/I2C at MHz rates, and execute a single 250Hz control loop. Separating them introduces inter-board wiring that adds mass, latency, and failure points. Alternative considered: separate receiver and standalone gyro stabiliser (common in hobbyist builds) — rejected because the two extra connectors and 3g wiring mass are unjustified in a sub-250g aircraft where every gram matters. The co-location also enables the MCU to implement failsafe logic without inter-board communication.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The &lt;50ms latency requirement (SYS-REQ-002) and 250g mass budget (SYS-REQ-001) jointly constrain the flight control architecture to a single integrated board. Discrete modules add 5-8ms of inter-board latency and 3-5g of wiring mass.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="informational; architecture-decision">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:ARC-REQ-002" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-REQ-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Propulsion Subsystem — ESC with integrated BEC rather than separate BEC module. The ESC already contains power MOSFETs and a microcontroller; adding a 5V linear or switching regulator to the ESC board eliminates a separate BEC module, saving 2-3g and one connector. Alternative considered: dedicated external BEC — rejected because in sub-250g aircraft, the ESC's switching noise on the BEC rail is manageable with a 100μF capacitor, and the mass/connector savings are critical. Trade-off accepted: ESC failure takes down both propulsion and avionics power. Mitigated by the failsafe glide being aerodynamic (gravity-powered descent), not requiring powered avionics beyond the initial motor-cut command.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass budget constraint (SYS-REQ-001) drives integration. A separate BEC adds 3g (1.2% of flight mass) for redundancy that provides minimal benefit — the aircraft glides safely without power.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="informational; architecture-decision">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:ARC-REQ-003" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-REQ-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Ground Charging System — Separate charging unit rather than onboard charger. The balance charger with per-cell monitoring, thermal sensing, and fault alarms weighs ~50g and draws 5V/2A from USB. Putting this onboard would add 50g to flight mass (20% of budget), making sub-250g impossible. Alternative considered: simplified onboard charging (single-cell monitoring only) — rejected because H-002 (LiPo thermal runaway, SIL 2) demands per-cell monitoring with thermal cutoff. The safety requirement cannot be compromised for convenience. Trade-off accepted: the child must remove the battery to charge, adding a step to the workflow.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-002 (SIL 2) requires per-cell monitoring and thermal cutoff. The charger implementing this weighs 50g — incompatible with 250g flight mass budget (SYS-REQ-001). Safety and mass constraints jointly force ground-based charging.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="informational; architecture-decision">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:ARC-REQ-004" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-REQ-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Airframe Subsystem — EPP foam construction rather than balsa/monokote or injection-moulded plastic. EPP absorbs crash energy through reversible compression rather than fracturing, enabling field repair with CA glue. Balsa frames shatter on impact, are destroyed after one crash, and are unsuitable for children. Injection-moulded plastic is crash-durable but heavier and cannot be field-repaired. EPP density 20-30 g/L gives the best strength-to-weight ratio for a crash-tolerant toy. Trade-off: EPP surfaces are rougher, increasing drag by approximately 10-15%. This drag penalty is within the performance margin of SYS-REQ-001 (5-15 m/s flight envelope, 80g thrust at 250g mass).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Field repairability (SYS-REQ-008, STK-REQ-008) and crash integrity (SYS-REQ-008) jointly require a material that absorbs impacts without shattering and can be glued by a child. EPP is the only material satisfying both constraints within the mass budget.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="informational; architecture-decision">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
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      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:ARC-REQ-005" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-REQ-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Radio Transmitter — Split architecture with ground transmitter as a separate handheld unit rather than smartphone-based control. A physical transmitter with mechanical gimbals provides tactile feedback, proportional control without visual attention, and zero latency compared to touchscreen Bluetooth control. Alternative considered: smartphone app over Bluetooth LE — rejected because touchscreen controls lack haptic feedback (children look at screen instead of aircraft, losing situational awareness), BLE latency is 20-40ms higher than direct 2.4GHz FHSS, and requiring a smartphone contradicts the no-internet, no-tools setup requirement (SYS-REQ-009). Trade-off accepted: dedicated transmitter adds to product cost (~$12 BOM) and box size.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Novice pilot control requirement (STK-REQ-002) and no-internet setup requirement (SYS-REQ-009) demand a dedicated transmitter. Smartphone control fails on tactile feedback, latency, and independence from external devices.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="informational; architecture-decision">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:ARC-REQ-006" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-REQ-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Power System — 2S LiPo rather than 1S LiPo or NiMH. A 2S (7.4V) pack delivers the 80g minimum thrust required for a brushless motor at 250g flight mass; 1S (3.7V) cannot drive a brushless motor to the required thrust level without doubling current draw (exceeding XT30 connector ratings of 15A continuous). NiMH is heavier by approximately 40% for equivalent energy density, pushing total mass over the 250g regulatory limit. Trade-off accepted: 2S LiPo has higher fire risk than 1S or NiMH, but this is mitigated by the balance charger (Ground Charging System) and the low cell count limiting cascade failure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass budget (SYS-REQ-001 &lt;250g) and thrust requirement (80-200g static) jointly require 2S LiPo. 1S lacks voltage for efficient brushless drive; NiMH is too heavy. Fire risk mitigated by SYS-REQ-005 (balance charger with thermal cutoff).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="informational; architecture-decision">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:ARC-REQ-007" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC-REQ-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ARC: Power System — 2S LiPo with passive power distribution PCB and ESC-integrated BEC rather than dedicated battery management IC. A kids airplane at 250g all-up mass requires &lt;30Wh energy; a dedicated BMS IC adds 5g and £3 BOM cost with no measurable safety gain over the ESC's built-in LVC. The polyswitch fuse on the distribution PCB provides short-circuit protection without sacrificing the field-replaceability required by STK-REQ-008. This approach matches designs used in mass-market sub-250g foam trainers (Hobbyzone, E-flite Champ).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass budget (SYS-REQ-001) and field-replaceability (STK-REQ-008) jointly preclude a dedicated BMS IC. The ESC LVC and polyswitch fuse provide equivalent protection at zero added mass. Approach validated by E-flite Champ and Hobbyzone Firebird sub-250g trainer designs.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="informational; architecture-decision">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-001" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between Kids Remote Control Airplane and USB Power Supply SHALL accept 5 V DC input at 2 A maximum via USB-A or USB-C connector, with reverse polarity protection and over-current fusing at 2.5 A.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="External interface: USB is the universal household power source. 5V/2A provides 10W, sufficient for 1C charging of a 450mAh 2S LiPo (7.4V × 0.45A = 3.3W plus charger losses). Reverse polarity protection prevents damage from non-standard cables. Over-current fuse protects the USB source.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; external; session-485; idempotency:ifc-ext-usb-power-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-002" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between Kids Remote Control Airplane and the Atmosphere SHALL generate positive lift at airspeeds between 5 m/s and 15 m/s at air densities from 1.007 kg/m3 (2000 m AMSL, 40 C) to 1.341 kg/m3 (sea level, -5 C), with a minimum lift-to-drag ratio of 4:1 at cruise speed.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="External interface: the atmosphere is the aerodynamic medium. The density range covers the full operational envelope (-5C to 40C, sea level to 2000m AMSL). L/D of 4:1 ensures the aircraft can maintain altitude at cruise without full throttle and glide safely in failsafe mode.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; external; session-485; idempotency:ifc-ext-atmosphere-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-003" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between Kids Remote Control Airplane and the 2.4 GHz ISM Band SHALL operate within the 2.400 to 2.4835 GHz frequency range using FHSS modulation across a minimum of 40 channels, with total radiated power not exceeding 1 W EIRP per FCC Part 15.249.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="External interface: the 2.4 GHz ISM band is a shared public resource. FCC Part 15.249 and ETSI EN 300 328 mandate the power ceiling. FHSS across 40+ channels provides interference resilience in WiFi-dense environments. The transmitter and receiver both operate as Part 15 intentional radiators.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; external; session-485; idempotency:ifc-ext-ism-band-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-004" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radio Transmitter and Flight Control Electronics SHALL carry 3-channel proportional control data (throttle, elevator, rudder/aileron) plus trim offsets and failsafe configuration via 2.4 GHz FHSS at a frame rate of at least 50 Hz with end-to-end latency not exceeding 20 ms from RF transmission to PWM output.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Internal interface: this is the primary control data path. 50 Hz frame rate provides smooth proportional control (20ms update interval). 20ms RF-to-PWM latency leaves 30ms budget for servo mechanical response within the 50ms total system latency requirement (SYS-REQ-002). Failsafe config must be stored in receiver to enable autonomous failsafe when TX is off.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; internal; session-485; idempotency:ifc-tx-fc-control-data-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-005" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Power System and Propulsion Subsystem SHALL deliver 7.4 V nominal (6.0 V minimum, 8.4 V maximum) at up to 8 A continuous via XT30 connectors with 18 AWG silicone wire, with voltage drop not exceeding 0.2 V at maximum current.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Internal interface: the power bus to ESC/motor is the highest current path in the aircraft. 8A at 7.4V is 59W peak power. XT30 connectors rated for 30A provide margin. 18 AWG wire limits resistive losses to 0.2V at 8A over the short fuselage run (~15cm). Voltage drop beyond 0.2V causes ESC brownout at low battery.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; internal; session-485; idempotency:ifc-power-propulsion-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-006" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Flight Control Electronics and Propulsion Subsystem SHALL carry a PWM throttle signal (1000 to 2000 microseconds pulse width at 50 Hz) on a single signal wire with 3.3 V logic level, with the ESC acknowledging motor-stop command within 200 ms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Internal interface: standard RC PWM protocol. 1000us = motor stop, 2000us = full throttle. 200ms motor-stop response is required for failsafe (SYS-REQ-004) — the motor must be confirmed stopped before the aircraft enters glide mode. ESC must not rearm without a deliberate throttle-up sequence to prevent accidental motor start during handling.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; internal; session-485; idempotency:ifc-fc-propulsion-pwm-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-007" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Electronic Speed Controller MOSFET Half-Bridge and the Brushless DC Motor SHALL provide three-phase commutation at switching frequency 8 kHz to 32 kHz, phase current up to 20 A continuous (30 A peak 5 s), phase voltage 0 to 7.4 V, with inter-phase dead time minimum 200 ns to prevent shoot-through.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Drives the BLDC motor commutation requirement. 200ns dead time is minimum for the selected MOSFET pair turn-off time (typically 100-150ns); insufficient dead time causes shoot-through destroying both FETs and causing uncontrolled full-power motor runaway — a SIL 2 failure mode.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; propulsion-subsystem; sil-2; session-486; idempotency:ifc-esc-motor-3phase-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-008" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The mechanical interface between the Brushless DC Motor shaft and the Propeller SHALL maintain positive engagement under a minimum axial extraction force of 20 N and torsional torque of 0.3 Nm, using a prop adapter or collet nut to the motor shaft with tightening torque per motor manufacturer specification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Propeller separation during flight is a SIL 2 hazard: a released 7x4 propeller at 12000 RPM has kinetic energy sufficient to cause eye injury. 20N axial retention exceeds worst-case aerodynamic unloading force during negative-g manoeuvre. Collet nut design preferred over set screw for field-replaceable positive retention.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; propulsion-subsystem; sil-2; session-486; idempotency:ifc-motor-prop-mech-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-009" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the ESC Microcontroller and the Gate Driver IC SHALL use 3.3 V CMOS logic levels for commutation signals, with propagation latency from MCU output to gate driver output of less than 150 ns, to ensure BEMF zero-crossing alignment.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="MCU to gate driver signal integrity determines commutation accuracy. &gt;150ns propagation shifts zero-crossing detection window causing higher phase current at commutation, increasing MOSFET switching losses and motor heating — degrading LVC accuracy and potentially masking thermal runaway.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; propulsion-subsystem; session-486; idempotency:ifc-mcu-gatedriver-logic-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-010" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radio Transmitter 2.4GHz RF Module and the transmitter antenna SHALL exhibit a feed impedance of 50 ohms ±10%, with VSWR less than 2.0:1 across the 2.400-2.4835 GHz band, ensuring less than 20% reflected power.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="50-ohm match is the standard for 2.4GHz RF circuitry. VSWR &gt;2:1 means &gt;11% reflected power returning into RF module PA, causing distortion and output power reduction. On toy-grade PCB antennas, impedance mismatch is the primary cause of reduced range — below 150m LOS — triggering false failsafe at normal operating range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radio-transmitter; session-486; idempotency:ifc-tx-rf-antenna-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-011" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Flight Control Electronics and the Elevator Servo SHALL carry a standard 50 Hz PWM signal with pulse width between 1000 us and 2000 us at 3.3 V logic level, providing proportional elevator deflection of plus or minus 30 degrees.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Elevator servo requires standard RC PWM signal from FCE to actuate control surface; 50Hz frame rate and 1000-2000us range are universal RC servo standards ensuring compatibility with any replacement servo during field repair per STK-REQ-008.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-fce-elevator-servo-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-012" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Power System and Flight Control Electronics SHALL deliver 5.0 V regulated DC at up to 500 mA sustained current via the ESC BEC output, with voltage ripple less than 50 mV peak-to-peak.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE receiver and gyro MCU require stable 5V supply; ESC BEC is the designated power source per ARC-REQ-002. Voltage tolerance from STM32-class MCU and RC receiver datasheets requiring 4.75-5.25V.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-power-to-fce-5v-v2-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-013" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Flight Control Electronics and the Rudder Servo SHALL carry a 50 Hz PWM signal with pulse width between 1000 us and 2000 us at 3.3 V logic level, providing proportional rudder deflection of plus or minus 25 degrees.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Rudder servo requires standard RC PWM from FCE identical to elevator servo; shared signal standard ensures field replaceability per STK-REQ-008 without bespoke components.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-fce-rudder-servo-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-014" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the LiPo Battery Pack and the ESC SHALL use a polarised XT30 connector rated at minimum 15 A continuous current, with female connector on the battery side and male connector on the ESC side, polarity marked by red positive and black negative wiring.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="XT30 connector rated for 30A peak/15A continuous exceeds maximum ESC draw (burst ~10A for the target motor class) while remaining compact and lightweight. Polarisation markings prevent reverse-polarity connection which would destroy the ESC and may cause battery fire.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-battery-esc-xt30-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-015" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-015">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the LiPo Battery Pack balance tap and the Ground Charging System SHALL use a JST-XH 3-pin connector (2S configuration), providing individual cell voltage monitoring access to each cell during charging, with all three pins (negative, cell-1-positive, cell-2-positive) consistently wired.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="JST-XH is the industry standard balance connector for 2S LiPo packs; per-cell monitoring via this connector enables the charger to implement the individual cell voltage termination required by SYS-REQ-005, preventing overcharge of unbalanced cells.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-battery-balance-jst-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-016" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-016">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The mechanical interface between the Flight Control Electronics board and the Airframe SHALL mount the FCE PCB on 4 rubber-damped standoffs achieving a minimum 20 dB vibration attenuation at frequencies above 50 Hz, and constrain the PCB within plus or minus 2 mm displacement under a 10g shock event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gyroscope on FCE PCB is sensitive to airframe vibration from motor and propeller; 20dB attenuation at 50Hz reduces IMU noise floor to acceptable levels for the 250Hz control loop. 10g shock constraint prevents connector disconnection during a hard landing.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-fce-airframe-mount-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-017" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-017">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radio Transmitter and the Pilot SHALL provide two self-centering proportional joystick axes for throttle/elevator on the left stick and aileron/rudder on the right stick, with spring-loaded centring force of 100-200 gf, and a spring-return throttle trim accessible with the thumb.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mode-2 transmitter layout is the global standard for beginner RC flying; spring-centering force in the 100-200gf range is confirmed comfortable for hands aged 8+ without fatiguing for 15-minute sessions, addressing STK-REQ-001 for the target 8-14 age group.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-transmitter-pilot-hmi-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-018" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-018">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the IMU (3-axis gyroscope) and the Flight Control MCU SHALL use SPI at 1 MHz or I2C at 400 kHz, delivering gyroscope rate data at a minimum of 1 kHz sample rate with a noise density below 0.05 deg/s per root-Hz.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE MCU runs a 250Hz attitude control loop; 1kHz IMU data rate provides 4x oversampling for digital low-pass filtering before control loop execution. 0.05 deg/s/sqrt(Hz) noise density ensures attitude estimate error stays below 0.5 degrees at 250Hz loop closure, which is consistent with the plus or minus 45 degree bank angle limit in SYS-REQ-003.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-imu-mcu-spi-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-019" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-019">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Ground Charging System and the AC Mains Supply SHALL accept 100-240 V AC at 50-60 Hz via an IEC C7 or USB-A or USB-C input rated at a minimum of 10 W, providing a minimum 90 percent power conversion efficiency at rated output.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Universal input voltage range (100-240V) allows use in all markets (EU, US, UK, Asia) without an adapter, addressing STK-REQ-011 which requires a packaged complete system ready to use globally. 90 percent efficiency limit ensures the charger does not exceed 0.5W idle draw under EU ErP regulations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-charger-mains-input-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-020" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-020">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Power System (LiPo pack) and the Flight Control Electronics voltage monitoring circuit SHALL provide battery voltage to an ADC input via a resistor divider with a full-scale range of 8.4 V (2S full charge) scaled to 3.3 V, with measurement accuracy of plus or minus 50 mV.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE must detect per-cell voltage to implement autonomous descent below 3.3V/cell (SYS-REQ-004). 50mV accuracy at the cell level is sufficient to trigger the 3.3V threshold reliably before the ESC low-voltage cutoff (3.0V) is reached, providing a safe margin.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ifc-fce-lipo-voltage-sense-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-021" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-021">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the LiPo Battery Pack and the Power Distribution PCB SHALL use an XT30 polarised connector rated to 30 A continuous, with the positive rail protected by the PCB PTC fuse before any branch point.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-014 already specifies the battery-to-ESC connector; this requirement extends the same polarisation and current-rating constraint to the power distribution path. XT30 was selected over XT60 to save 3g while still carrying 30A burst current.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; power-system; sil-2; session-488; idempotency:ifc-battery-pdpcb-xt30-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-022" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-022">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the AC-DC Power Supply Module and the LiPo Balance Charger IC SHALL provide 12 V DC at up to 500 mA with voltage tolerance of plus or minus 0.5 V and ripple less than 100 mV peak-to-peak.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The LiPo balance charger IC input voltage specification (typically 7-15V for a 2S charger) sets the 12V nominal. 500mA at 12V provides 6W, sufficient for 225mA charge into 8.4V (1.9W) plus charger overhead. 100mV ripple limit prevents false charge-termination triggering due to supply noise.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; ground-charging-system; sil-2; session-488; idempotency:ifc-psu-charger-ic-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-023" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-023">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radio Transmitter and the Flight Control Electronics Receiver during the binding procedure SHALL exchange a unique transmitter identifier over the 2.4 GHz FHSS channel set, with the receiver storing the identifier and refusing control frames from all other transmitters after binding is complete.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-006 (RF cross-binding) requires that each aircraft respond only to its bound transmitter. The binding protocol must authenticate transmitter identity at a session level so that unbound transmitters in the vicinity cannot seize control. This is the interface-level specification for the bind function described in SUB-REQ-033 and SUB-REQ-018.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radio-transmitter; sil-1; session-498; idempotency:ifc-tx-rx-bind-protocol-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-024" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-024">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radio Transmitter RF Module and the Flight Control Electronics Receiver SHALL convey a Received Signal Strength Indicator (RSSI) value updated at a minimum of 10 Hz, with the receiver activating failsafe output when RSSI falls below a configurable threshold corresponding to the start-of-packet loss at the current range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RSSI monitoring provides the leading indicator for impending loss-of-link before the 500 ms frame-loss failsafe timeout triggers (SYS-REQ-004). A 10 Hz update rate ensures the pilot receives a warning in time to react. This interface is the link between the RF physical layer and the failsafe logic in SUB-REQ-018 and SUB-REQ-027.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radio-transmitter; sil-1; session-498; idempotency:ifc-rssi-threshold-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-025" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-025">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Electronic Speed Controller MCU and the MOSFET Gate Driver IC SHALL use 3.3 V CMOS logic level gate control signals with a rise time of less than 20 ns to drive the gate driver input, and the gate driver SHALL provide output gate drive voltages of 10-15 V to the MOSFET gate pins.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 20 ns MCU signal rise time ensures clean digital transitions that minimise gate driver input jitter. Gate drive voltage of 10-15 V ensures MOSFET full enhancement (minimising on-resistance) across the operating temperature range. This interface specification constrains the gate driver IC selection to types compatible with 3.3 V logic input and 10+ V gate output, ensuring the MOSFET bridge meets the 8 milliohm specification in SUB-REQ-034.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; propulsion-subsystem; sil-2; session-498; idempotency:ifc-mcu-gatedriver-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:IFC-REQ-026" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-026">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The interface between the Radio Transmitter Joystick Axes and the 2.4 GHz RF Module SHALL sample stick position at a minimum of 100 Hz and SHALL transmit updated channel values in each RF frame with a maximum frame interval of 20 ms at 50 Hz frame rate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 50 ms end-to-end control latency budget (SYS-REQ-002) allocates approximately 20 ms to the RF transmission path. A 20 ms maximum frame interval ensures the RF link contribution to latency is bounded, leaving the remaining budget for PWM decode and servo response. This interface links the stick encoder (SUB-REQ-030) to the RF module (SUB-REQ-032).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="interface; radio-transmitter; sil-1; session-498; idempotency:ifc-tx-stick-to-rf-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-001" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL enable a child aged 8-14 to independently set up, launch, fly, and land the aircraft in a local park within 25 minutes total session time including setup and teardown.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Child Pilot, Weekend Park Flight scenario: the primary ConOps scenario shows a 25-minute cycle from unbox to packup. If setup exceeds this budget, children lose interest and the product fails its mission.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-child-pilot; session-485; idempotency:stk-child-pilot-session-time-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-002" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL provide flight controls that allow a novice pilot with no prior RC experience to perform basic manoeuvres (straight flight, banked turns, climb, descend) within the first flight session.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Child Pilot, Weekend Park Flight scenario: the child practices circuits, left/right turns, and figure-eights on first outing. If controls require pre-training, the product loses the unbox-and-fly value proposition.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-child-pilot; session-485; idempotency:stk-child-pilot-intuitive-control-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-003" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL allow a parent to verify safe operating state (battery charge, control link, airframe integrity) using only onboard visual indicators and the product manual, without specialised tools.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Parent/Guardian, all scenarios: parent performs go/no-go checks before flight, post-crash inspection, and charging monitoring. Must be accessible to non-technical adults.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-parent; session-485; idempotency:stk-parent-visual-status-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-004" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL provide battery charging with active per-cell monitoring, thermal protection, and audible plus visual fault warnings that alert a non-technical user to abort charging before thermal runaway.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Parent/Guardian, Charging Fire Emergency scenario: charger detected cell imbalance and triggered warnings, allowing parent to intervene. Without cell-level monitoring, a damaged battery reaches thermal runaway on a kitchen counter.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-parent; session-485; idempotency:stk-parent-safe-charging-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-005" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL limit maximum kinetic energy at any achievable airspeed to below 12 J to ensure that an uncontrolled impact with a bystander does not cause serious injury.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bystanders, H-004 (descent strike): with ~0.25 kg mass and max airspeed ~15 m/s, KE is ~28 J in a dive. Mass and speed limits must keep energy below the 12 J threshold derived from ASTM toy impact safety standards.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-bystander; session-485; idempotency:stk-bystander-kinetic-energy-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-006" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL autonomously enter a controlled descent mode when the control link is lost for more than 500 ms, preventing unpredictable flyaway over populated areas.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bystanders, Signal Loss Failsafe scenario: aircraft behind trees loses signal, failsafe triggers controlled glide. Without this, lost-link aircraft fly unpredictably until battery dies, potentially striking people or property far from the flying site.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-bystander; session-485; idempotency:stk-bystander-failsafe-descent-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-007" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL be constructible from commercially available materials (EPP/EPO foam, COTS electronics) and standard manufacturing processes to support production volumes exceeding 10,000 units per year at a retail price point below USD 80.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Manufacturer: product must be economically viable at scale. EPP foam is CNC-cut, electronics are off-the-shelf. Custom ASICs or exotic materials make the price point impossible and kill the product.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-manufacturer; session-485; idempotency:stk-manufacturer-production-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-008" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL be field-repairable for common crash damage (broken propeller, cracked wing foam, loose control linkage) within 15 minutes using spare parts and adhesive included in the product box.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Manufacturer, Wind Gust Crash scenario: child replaces propeller and glues wing crack in 10 minutes at field. If field repair is impossible, every crash becomes a warranty return, destroying margins and customer satisfaction.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-manufacturer; session-485; idempotency:stk-manufacturer-field-repair-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-009" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL comply with EN 71 Parts 1-3 (EU), ASTM F963 (US), and equivalent toy safety standards for mechanical strength, flammability, and material toxicity.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Regulators: these are mandatory market-access requirements. Non-compliance prevents legal sale in the US and EU — the two largest toy markets.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-regulator; session-485; idempotency:stk-regulator-toy-safety-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-010" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane total flight-ready mass SHALL be below 250 g to remain exempt from UAS registration requirements under FAA Part 107 and EASA drone regulations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Regulators: sub-250g threshold is the globally recognized boundary below which recreational model aircraft avoid registration, remote ID, and pilot certification requirements. Exceeding this mass transforms a toy into a regulated UAS.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-regulator; session-485; idempotency:stk-regulator-mass-limit-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-011" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL be packaged as a complete system (aircraft, transmitter, battery, charger, spare propeller, manual) in a single retail box compliant with IATA DGR Section II for lithium polymer battery shipping.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Retailer: single-box packaging simplifies shelf management and prevents missing-accessory returns. IATA DGR Section II compliance is required for air freight — non-compliant packaging forces expensive ground-only logistics.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-retailer; session-485; idempotency:stk-retailer-packaging-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-012" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL display clear age-rating labelling (8+) and multilingual safety warnings on all packaging surfaces visible at retail, per EN 71 Part 1 and ASTM F963 labelling requirements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Retailer: age labelling protects retailer from liability if sold to underage child. Missing or unclear labelling triggers retailer compliance audits and potential delisting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-retailer; session-485; idempotency:stk-retailer-labelling-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-013" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL maintain controlled flight in wind speeds up to 15 knots, and SHALL maintain controllability with reduced manoeuvrability in wind speeds from 15 to 25 knots.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Environment as stakeholder, Physical constraint: 15 kt is typical park-flying conditions. 15-25 kt is marginal but the aircraft must remain controllable enough to land safely rather than becoming uncontrollable.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-environment; session-485; idempotency:stk-environment-wind-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:STK-REQ-014" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL operate its control link within the 2.4 GHz ISM band at less than 1 W EIRP using FHSS modulation, and SHALL tolerate co-channel interference from WiFi and Bluetooth sources without loss of aircraft control.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Environment as stakeholder, Electromagnetic constraint: parks have WiFi hotspots, Bluetooth speakers, other RC aircraft. FCC Part 15.249 mandates &lt;1W EIRP. If the link cannot coexist, flights near any public space fail.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="stakeholder; stk-environment; session-485; idempotency:stk-environment-rf-coexist-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-001" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Propulsion Subsystem ESC SHALL respond to a PWM throttle command change from idle to full (1000 us to 2000 us) with motor RPM increase to 80% of maximum within 250 ms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-001 flight performance: 250 ms throttle response prevents control lag that would cause altitude loss during wind gust correction. IEC 62061 SIL 2 application — delayed thrust in gust recovery is a loss-of-control precursor per H-001. 250 ms is consistent with RC aircraft ESC standard response times.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; sil-2; session-486; idempotency:sub-propulsion-esc-response-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-002" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Propulsion Subsystem Brushless DC Motor SHALL generate a minimum thrust of 80 g when supplied with the nominal 7.4 V bus and a 100% throttle command, using the specified 6x4 propeller combination.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-001: 80g minimum thrust provides 1:1 thrust-to-weight ratio for a 250g sub-limit airframe, necessary for climb and wind-gust compensation. Below 80g the aircraft cannot sustain level flight against any headwind component.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; sil-2; session-486; idempotency:sub-propulsion-motor-thrust-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-003" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Propulsion Subsystem Propeller SHALL fragment or plastically deform on impact with a rigid surface at a blade tip velocity of 15 m/s or greater, releasing less than 0.4 J per fragment at any kinetic energy barrier test per EN 71 blade impact method.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-006 (frangible propeller): EN 71 toy safety requires injury protection from propeller strike. 0.4 J is the EN 71 kinetic energy threshold for low-risk injury. Frangible design means a grass-strike or child-contact event produces clean blade fracture rather than laceration. Glass-filled nylon achieves this; carbon fibre does not.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; sil-2; session-486; idempotency:sub-propulsion-prop-frangible-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-004" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When any LiPo cell voltage drops below 3.3 V, the ESC SHALL progressively reduce motor power by 50% per 100 mV below the 3.3 V threshold and SHALL cut motor drive completely when any cell reaches 3.0 V, transitioning the Propulsion Subsystem to the unpowered-glide safe state within 100 ms of threshold detection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-010 (LVC): SIL 2 per H-003 (battery deep discharge causing cell reversal and LiPo fire). IEC 62061 SIL 2 requires quantified safe state transition with deterministic timing. Progressive reduction (not hard cutoff) is selected because abrupt motor stop at altitude causes uncontrolled pitch-down and higher impact energy — gradual descent is the safer intermediate state. 3.0V hard cutoff prevents cell reversal.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; sil-2; safety; session-486; idempotency:sub-propulsion-lvc-safestate-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-005" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Propulsion Subsystem (ESC + motor + propeller combined) total mass SHALL not exceed 45 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-001 and total system mass constraint of &lt;250g: propulsion budget is 45g (motor 30g, ESC 8g, prop 7g). Exceeding 45g forces structural mass reduction which degrades crash survivability per SYS-REQ-008.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; session-486; idempotency:sub-propulsion-mass-budget-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-006" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The ESC SHALL not exceed 85 degrees Celsius case temperature during a 10-minute full-power continuous run at 40 degrees Celsius ambient, as measured on the FET package surface.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC thermal runaway is a LiPo fire precursor (H-002 adjacent hazard). 85C is the derate point for standard TO-252 MOSFETs; above this, on-resistance increases exponentially leading to thermal runaway. 10-minute run matches maximum flight endurance, ensuring test is bounding case.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; session-486; idempotency:sub-propulsion-esc-thermal-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-007" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Transmitter SHALL transmit a new control frame containing proportional stick positions within 20 ms of a stick deflection input change exceeding 1% of full travel.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-002 (3-channel proportional control) and STK-REQ-001 (intuitive control for child). 20ms TX latency is the transmitter contribution to total end-to-end 50ms latency budget. At 50Hz frame rate the TX update period is 20ms; any longer means missed input frames causing jerky control feel which degrades child pilot confidence.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radio-transmitter; sil-1; session-486; idempotency:sub-tx-control-latency-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-008" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Transmitter 2.4GHz RF Module SHALL maintain a frame loss rate of less than 1 percent during transmission to the paired airborne receiver at a line-of-sight range of 150 m in an open outdoor environment without co-channel interferers.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-007 (control link frame loss &lt;1% at 150m). TX half of the RF link budget requirement. FHSS across 79+ channels provides interference tolerance; &gt;1% frame loss at 150m indicates TX power or antenna degradation. 150m is the design range ensuring safe operation in typical park environments.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radio-transmitter; sil-1; session-486; idempotency:sub-tx-rf-range-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-009" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Transmitter SHALL support a bind-time configurable failsafe output state, transmittable as a distinct packet type to the airborne receiver, such that the receiver shall replicate failsafe servo positions without any further TX input once bound.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-004 (failsafe on 500ms signal loss) and STK-REQ-006 (autonomous descent on signal loss). The failsafe state must be stored in the receiver — not retransmitted — because the TX is absent during the triggering condition. Bind-time configuration ensures the failsafe is set deliberately, not accidentally.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radio-transmitter; sil-1; session-486; idempotency:sub-tx-failsafe-config-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-010" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Power System LiPo Battery Pack SHALL provide a minimum usable capacity of 400 mAh at a 10C continuous discharge rate at 7.4V nominal, sustaining full-throttle flight for at least 8 minutes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-001 requires 8+ minutes flight. A 450mAh 2S pack at 75% usable capacity delivers 337mAh. At mean current draw of ~2.5A (cruise power for a 28g/motor combo), 8 min requires ~333mAh, leaving 4mAh margin. Minimum 400mAh rated ensures margin against cell aging and temperature derating.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; power-system; sil-2; session-488; idempotency:sub-power-capacity-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-011" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Power System 5V BEC SHALL maintain output voltage between 4.75 V and 5.25 V under loads from 0 mA to 1500 mA, with transient response returning to within 5% of nominal within 2 ms of a load step.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Flight control electronics, receiver, and two servos draw up to 1.2A combined. A 10% voltage window matches the rated input tolerance of standard hobby receivers and digital servos. Transient response limit prevents false signal decoding by the receiver during servo movement spikes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; power-system; sil-2; session-488; idempotency:sub-power-bec-voltage-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-012" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Power System LiPo Battery Pack SHALL have a total mass not exceeding 30 g when fully charged.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-010 limits total system mass to 250g. The mass budget allocates 30g to the battery pack (propulsion 40g, airframe 80g, electronics 25g, misc 25g, margin 50g). Exceeding this forces trades in structural or payload mass.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; power-system; sil-2; session-488; idempotency:sub-power-battery-mass-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-013" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When any individual LiPo cell voltage drops below 3.3 V during discharge, the Power System SHALL signal the ESC to engage low-voltage cutoff within 200 ms, preventing deep discharge below 3.0 V/cell.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 requires LVC at 3.3V/cell. Deep discharge below 3.0V causes irreversible plating of lithium metal inside cells, creating internal short-circuit paths and thermal runaway risk. 200ms response limit ensures that at maximum 10C draw, cell voltage recovers before the cell reaches permanent damage threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; power-system; sil-2; safety; session-488; idempotency:sub-power-lvc-safestate-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-014" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Power Distribution PCB SHALL incorporate a resettable PTC fuse rated to interrupt current at 8 A within 1 second to protect wiring from short-circuit faults.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RC airplane power wiring is typically 22-26 AWG silicone wire rated to ~5A continuous. A short circuit at 7.4V on unprotected 24AWG wire can deliver 15+ A causing wire insulation to char within 3 seconds. PTC fuse at 8A trip provides margin above normal 4.5A peak draw while interrupting fault current before wiring damage.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; power-system; sil-2; session-488; idempotency:sub-power-ptc-fuse-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-015" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-015">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ground Charging System LiPo Balance Charger IC SHALL terminate charging when any individual cell voltage reaches 4.20 V plus or minus 0.01 V, or when charge current falls below 22 mA (0.05C for 450 mAh cell), whichever occurs first.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 requires per-cell monitoring with automatic termination. Cell voltage above 4.22V causes electrolyte oxidation and gas evolution that can lead to thermal runaway in LiPo cells. 0.01V tolerance on the 4.20V threshold is the standard IEC 62133-1 requirement for lithium cell chargers. 0.05C termination current is the EN standard minimum for CCCV full-charge detection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ground-charging-system; sil-2; safety; session-488; idempotency:sub-charger-termination-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-016" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-016">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ground Charging System LiPo Balance Charger IC SHALL charge a fully depleted 450 mAh 2S LiPo pack to 95 percent capacity within 90 minutes at a charge rate of 0.5C (225 mA) or less.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-004 requires safe charging. 0.5C charge rate is the conservative IEC 62133 recommended maximum for lithium polymer cells without active thermal management. At 225mA CCCV, a 450mAh pack reaches 95% in ~1 hour. The 90-minute limit accounts for balance overhead and ensures the product is ready for a second flight within a reasonable session.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ground-charging-system; sil-2; session-488; idempotency:sub-charger-rate-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-017" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-017">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Ground Charging System Charge Status LED Indicator SHALL display red during active charging and green upon charge completion, with the green indication visible at a distance of 1 m in ambient lighting of up to 1000 lux.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-003 requires a parent to verify safe operating status before the child handles the battery. A dual-colour LED with defined luminance is the minimum unambiguous visual indicator that charging is complete without requiring the parent to interpret voltage readings.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; ground-charging-system; sil-2; session-488; idempotency:sub-charger-led-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-018" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-018">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Flight Control Electronics 2.4GHz FHSS Receiver SHALL initiate failsafe output within 500 ms of detecting loss of valid control frames, setting throttle output to 1000 us (zero throttle) and elevator and rudder outputs to their neutral positions (1500 us).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 mandates controlled descent on control loss. 500ms is derived from the link layer frame rate: at 50Hz the receiver misses 25 consecutive frames before initiating failsafe, providing enough robustness to distinguish momentary multipath from genuine link loss. Zero throttle ensures motor stops rather than holding a potentially dangerous attitude.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; flight-control-electronics; sil-1; safety; session-488; idempotency:sub-fce-rx-failsafe-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-019" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-019">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Flight Control Electronics Flight Control MCU SHALL apply gyro-assisted stability augmentation to limit bank angle excursion to plus or minus 45 degrees from level in both the pitch and roll axes under pilot control inputs, with a loop closure rate not exceeding 50 ms per cycle.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-003 requires gyro-assisted stability limiting bank angle to 45 degrees. 50ms loop closure (20Hz minimum) matches the 50Hz servo PWM update rate, ensuring every servo command cycle includes a corrected gyro contribution. This prevents the faster-than-human angular rates that cause inadvertent inverted flight in novice pilots.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; flight-control-electronics; sil-1; safety; session-488; idempotency:sub-fce-gyro-stability-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-020" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-020">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Flight Control Electronics Elevator Servo and Rudder Servo SHALL each achieve full deflection travel (10 mm) in less than 100 ms under a 100 g-cm load when commanded by a step PWM input change from 1000 us to 2000 us at 5.0 V supply.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Control surface response speed directly affects the system loop closure time. At typical cruise speed of 7 m/s, a 100ms servo lag allows the aircraft to travel 0.7m before correction, which for a wing with 1m span is a significant fraction of the angular correction window. 100ms is the maximum allowable value for a 45-degree bank limit to be effective.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; flight-control-electronics; sil-1; session-488; idempotency:sub-fce-servo-response-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-021" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-021">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Flight Control Electronics subsystem (receiver, FCE board with MCU and IMU, two servos, and all interconnect wiring) total mass SHALL not exceed 25 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-010 limits total system mass to 250g. The electronics mass budget (25g) is derived from: airframe 80g, propulsion 40g, battery 30g, misc/margin 75g = 245g, leaving 25g for electronics. This matches commercially available 5g micro servo pairs (10g) plus 5g receiver and 5g FCE board.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; flight-control-electronics; sil-1; session-488; idempotency:sub-fce-mass-budget-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-022" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-022">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Airframe Subsystem EPP Foam Fuselage SHALL withstand a 10 m/s nose-first impact onto a grass surface without battery ejection from the battery tray, verified by a retained battery tray lock after impact.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-008 requires crash integrity at 10 m/s. Battery ejection during a crash is the primary secondary-injury mechanism: a 30g LiPo at 10 m/s has 1.5J of kinetic energy — sufficient to cause eye injury to a bystander. EPP foam and a positive-retention battery latch must be designed to absorb crash energy without releasing the battery.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; airframe-subsystem; sil-1; safety; session-488; idempotency:sub-airframe-crash-integrity-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-023" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-023">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Airframe Subsystem (fuselage, wing, tail, control surfaces, pushrods, and all structural hardware) total mass SHALL not exceed 80 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-010 limits total system mass to 250g. Mass budget: electronics 25g, propulsion 40g, battery 30g, misc/margin 75g = 170g, leaving 80g for airframe. An EPP foam fuselage with 600mm span wing at this mass is achievable and aligns with the Hobbyzone/E-flite Champ-class reference design.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; airframe-subsystem; sil-1; session-488; idempotency:sub-airframe-mass-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-024" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-024">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Airframe Subsystem Elevator Control Surface and Rudder Control Surface SHALL each provide a minimum neutral-to-full-deflection mechanical travel of 10 mm when actuated by a servo horn movement of 5 mm.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Adequate control surface travel determines the aircraft's pitch and yaw authority. 10mm deflection on the tail at cruise speed (7-12 m/s) produces enough moment to counteract atmospheric turbulence within the SYS-REQ-013 wind limit of 5 m/s. A 2:1 pushrod mechanical advantage is specified to match the servo's 5mm horn travel to the required 10mm control deflection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; airframe-subsystem; sil-1; session-488; idempotency:sub-airframe-control-travel-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-025" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-025">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When the ESC loses the PWM throttle input signal for more than 100 ms, the Electronic Speed Controller SHALL reduce motor drive to zero throttle output within 50 ms and maintain zero throttle until a valid PWM signal is re-established.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC classification as Functionally Autonomous (capable of self-directed motor commutation without continuous MCU supervision) requires a fail-safe override constraint per IEC 62061. Loss of throttle signal could result from wire break, connector fault, or MCU crash. Without this requirement, the motor could continue running at last commanded speed with no pilot authority — hazard H-001 (uncontrolled flight). 100ms detection window is conservative enough to avoid false triggers on PWM signal glitches (typical glitch is &lt;20ms).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion; sil-2; failsafe; session-490; idempotency:sub-esc-pwm-failsafe-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-026" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-026">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Flight Control Electronics Flight Control MCU SHALL implement stability augmentation using 3-axis gyroscope feedback to limit commanded bank angle to ±45 degrees and pitch angle to ±30 degrees when beginner mode is active, applying corrective elevator and rudder inputs at a minimum 250 Hz control loop rate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-003: the system-level stability augmentation requirement allocates to the FCE MCU, which is the only component with access to both gyro sensor data and servo control outputs. The 250Hz loop rate is required to respond to attitude disturbances before they exceed ±10 degrees from commanded trim — at slower rates, phase lag causes oscillation. Beginner mode rate limiting is a key safety mitigation for H-003 (uncontrolled attitude deviation).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; flight-control-electronics; sil-1; session-490; idempotency:sub-fce-stability-aug-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-027" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-027">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When the Flight Control Electronics 2.4GHz FHSS Receiver does not receive a valid control frame for more than 500 ms, the receiver SHALL output a pre-programmed failsafe PWM packet to all channels setting throttle to minimum (1000 μs) and control surfaces to a 5-degree nose-down glide trim within 100 ms of the timeout expiry.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-004. The receiver is the first component to detect RF loss and must initiate failsafe before the FCE MCU even detects a missing frame. The 100ms response window ensures the failsafe condition is applied within one flight control cycle, preventing a lag where the aircraft continues at last commanded thrust. The 5-degree nose-down trim produces a stable glide at approximately 2 m/s descent rather than a stall-and-spin.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; flight-control-electronics; sil-2; failsafe; session-490; idempotency:sub-receiver-failsafe-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-028" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-028">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Airframe Subsystem EPP foam fuselage battery bay SHALL retain the LiPo battery pack under nose-first impact at 10 m/s using a latched hatch mechanism rated to 50 N pull-out force, ensuring battery containment and preventing electrical connector disconnection during crash.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-008 battery-ejection sub-clause. SUB-REQ-022 covers structural integrity; this requirement specifically covers battery retention which is the highest consequence of impact — an ejected LiPo pack in children's hands after a crash is hazard H-002 (LiPo thermal event). 50N pull-out threshold is the maximum force transferred to the battery bay during a 10m/s deceleration on a 50g battery (10g deceleration load x 5 safety factor).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; airframe-subsystem; sil-2; session-490; idempotency:sub-airframe-battery-retention-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-029" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-029">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The complete Kids Remote Control Airplane system SHALL require no tools, internet access, or prior RC experience to achieve first flight readiness from unboxing, with all pre-flight steps (battery insertion, antenna extension, bind sequence, mode selection) completable by a child aged 10 in under 10 minutes following the printed quick-start guide.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from SYS-REQ-009. The 10-minute setup requirement drives specific design constraints: snap-fit connectors (no tools), pre-bound transmitter-receiver pair from factory (no pairing steps), and a single-page printed guide (no internet). The target age of 10 sets the cognitive complexity ceiling — steps requiring fine motor skills or abstract reasoning must be eliminated. Failure to meet this requirement directly risks the STK-REQ-001 25-minute park session scenario.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; session-490; idempotency:sub-system-setup-time-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-030" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-030">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Transmitter stick position encoder SHALL digitise each joystick axis to a minimum resolution of 1024 steps (10-bit) with a sample rate of at least 100 Hz, providing proportional control resolution to achieve 1 ms PWM step increments at the receiver output.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 1 ms PWM step increment derived from SYS-REQ-002 requires encoder resolution fine enough that quantisation error is not the dominant control limit. 10-bit at 100 Hz ensures sub-millisecond precision across the 1000-2000 us PWM range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radio-transmitter; session-498; idempotency:sub-tx-stick-encoder-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-031" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-031">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Transmitter SHALL operate from 4 x AA alkaline batteries and SHALL provide a minimum operational life of 5 hours of continuous use at 25°C, measured from full batteries to the transmitter low-battery LED warning activation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="5-hour battery life covers at least 12 consecutive 25-minute sessions (STK-REQ-001), eliminating battery changes across a typical weekend of use. AA alkaline batteries are universally available and remove rechargeable transmitter battery management complexity for child users.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radio-transmitter; session-498; idempotency:sub-tx-battery-life-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-032" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-032">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Transmitter 2.4 GHz RF Module SHALL operate at a conducted transmit power not exceeding 100 mW EIRP in compliance with FCC Part 15.247 and ETSI EN 300 328, and SHALL incorporate FHSS with a minimum of 30 frequency channels to reduce interference from co-channel 2.4 GHz devices.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-014 requires FHSS within the 2.4 GHz ISM band at less than 1 W EIRP. 100 mW provides regulatory margin while achieving the 150 m range of SYS-REQ-007. Minimum 30 channels ensures frequency diversity sufficient to maintain link quality in park environments with overlapping Wi-Fi.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radio-transmitter; regulated; sil-1; session-498; idempotency:sub-tx-rf-power-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-033" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-033">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Radio Transmitter SHALL incorporate a physical bind button that initiates the receiver binding sequence when held for 3 seconds with the transmitter powered on, and SHALL store the bound receiver identity in non-volatile memory retained across power cycles without battery.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bind persistence (H-006 mitigation) ensures the aircraft cannot respond to a different transmitter. Non-volatile storage eliminates rebinding after every flight, reducing setup burden for child users. The 3-second hold prevents accidental bind entry during normal operation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; radio-transmitter; sil-1; session-498; idempotency:sub-tx-bind-nvm-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-034" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-034">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Electronic Speed Controller MOSFET Half-Bridge SHALL use switching transistors rated for a minimum drain-source breakdown voltage of 20 V and a continuous drain current of at least 10 A at 60°C case temperature, with a maximum on-resistance of 8 milliohms per switch.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="2S LiPo peak discharge is 8.4 V; 20 V VDS provides a 2.4x margin against commutation switching transients. 10 A at 60°C supports maximum ESC current at full throttle (7-9 A for 150 W class motors). 8 milliohm on-resistance limits conduction losses to under 0.7 W per switch, keeping temperature within the 85°C limit of SUB-REQ-006.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; sil-2; session-498; idempotency:sub-esc-mosfet-spec-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-035" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-035">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Electronic Speed Controller Gate Driver IC SHALL enforce a minimum dead-time of 100 ns between the high-side and low-side MOSFET gate signals on each half-bridge to prevent shoot-through current during commutation transitions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Shoot-through creates a near-short-circuit across the battery, generating heat that can exceed LiPo maximum discharge current and contribute to H-002 (thermal runaway). 100 ns is the minimum practical dead-time for MOSFET gate capacitances of 1-10 nF; it eliminates shoot-through while adding less than 0.5% duty cycle error at 8 kHz commutation frequency.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; sil-2; safety; session-498; idempotency:sub-esc-deadtime-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-036" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-036">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Electronic Speed Controller Microcontroller SHALL execute the motor commutation loop with a maximum cycle time of 20 µs to support sensorless back-EMF commutation at motor speeds up to 10000 RPM.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="A brushless motor at 10000 RPM with 7 pole pairs completes one electrical cycle in 860 µs. Sensorless commutation requires back-EMF zero-crossing detection at a minimum of 50 samples per cycle, requiring a loop time no greater than 17 µs. 20 µs is the achievable limit for embedded MCUs at 16 MHz clock and supports the smooth torque delivery that SUB-REQ-001 (100 ms throttle step response) depends on.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; propulsion-subsystem; sil-2; session-498; idempotency:sub-esc-mcu-loop-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SUB-REQ-037" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-037">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Flight Control Electronics 2.4 GHz FHSS Receiver SHALL output a CPPM stream at 50 Hz frame rate on a single signal wire, encoding all received channels with pulse widths in the range 1000-2000 µs within a 20 ms frame period.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="CPPM reduces wiring from one wire per channel to a single signal wire, saving approximately 4 g of wiring mass in the airframe. The 20 ms frame period aligns with the 50 Hz servo update rate in IFC-REQ-011 and IFC-REQ-013, and is a prerequisite for the gyro-corrected mixing algorithm in SUB-REQ-026.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="subsystem; flight-control-electronics; sil-1; session-498; idempotency:sub-rx-cppm-output-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-001" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL achieve sustained level flight at airspeeds between 5 m/s and 15 m/s with a total flight-ready mass not exceeding 250 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from STK mass limit (&lt;250g for regulatory exemption) and operational need for slow, controllable flight. Below 5 m/s the aircraft stalls in light wind; above 15 m/s kinetic energy exceeds safe bystander impact thresholds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; performance; session-485; idempotency:sys-flight-envelope-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-002" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The transmitter SHALL provide proportional control on a minimum of 3 channels (throttle, elevator, rudder or aileron) with end-to-end control latency not exceeding 50 ms from stick deflection to control surface response.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from STK intuitive control need. Three channels is the minimum for controlled 3D flight. 50 ms latency is the threshold above which novice pilots perceive lag and over-correct, leading to pilot-induced oscillation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; performance; session-485; idempotency:sys-control-latency-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-003" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The aircraft SHALL incorporate gyro-assisted stability augmentation that limits bank angle to ±45 degrees and pitch angle to ±30 degrees in beginner mode, preventing novice pilots from entering unrecoverable attitudes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from STK novice pilot need. Without attitude limiting, a child's instinctive full-stick response to unexpected motion produces 90-degree banks and vertical dives. ±45° bank and ±30° pitch are the thresholds above which recovery requires trained reflexes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-1; safety; session-485; idempotency:sys-gyro-stabilisation-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-004" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="When the receiver detects loss of valid control frames for more than 500 ms, the Kids Remote Control Airplane SHALL cut motor power to idle and set control surfaces to a nose-down glide trim achieving a descent rate not exceeding 3 m/s.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-003 (flyaway) drives SIL 1. 500 ms is the standard RC failsafe timeout (FHSS frame rate ~9 ms means &gt;50 consecutive lost frames). 3 m/s descent rate limits impact energy to ~1.1 J for a 250g aircraft — well below injury threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-1; safety; session-485; idempotency:sys-failsafe-descent-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-005" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The balance charger SHALL monitor individual cell voltage during charging with automatic charge termination when any cell exceeds 4.20 V ±0.025 V, and SHALL disconnect charging current when battery surface temperature exceeds 45 degrees Celsius.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-002 (LiPo thermal runaway) drives SIL 2. Per-cell monitoring catches cell imbalance — the primary cause of thermal runaway in multi-cell LiPo packs. 45°C thermal cutoff is the industry-standard threshold for consumer LiPo charging per IEC 62133.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-2; safety; session-485; idempotency:sys-charge-safety-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-006" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The propeller SHALL be constructed from a material that yields or fragments on impact with a force not exceeding 15 N, preventing transmission of cutting forces to skin at maximum motor RPM.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-001 (propeller laceration) drives SIL 2. Nylon or flexible polymer propellers fragment rather than cut on impact. The 15 N breakaway threshold is derived from the force at which a rotating 5-inch prop in EPP foam aircraft can lacerate skin.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-2; safety; session-485; idempotency:sys-prop-frangible-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-007" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 2.4 GHz FHSS control link SHALL maintain less than 1 percent frame loss rate at a range of 150 m in open field conditions with at least three co-channel WiFi access points operating within 50 m of the transmitter.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from STK RF coexistence and operational range need. 150 m covers the typical park flying envelope. 1% frame loss is the threshold below which failsafe does not falsely trigger (50 consecutive lost frames needed at 9 ms rate).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; performance; session-485; idempotency:sys-link-range-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-008" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The aircraft airframe SHALL withstand a 10 m/s nose-first impact onto grass without battery ejection, exposure of electrical wiring, or creation of sharp edges capable of lacerating a child's hand during post-crash handling.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-004 (descent strike) and H-005 (exposed wiring). 10 m/s represents a typical crash speed from 10 m altitude in failsafe glide. Battery ejection creates an electrocution and fire hazard; exposed wiring can short-circuit at 20-40A.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-1; safety; session-485; idempotency:sys-crash-integrity-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-009" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The complete system SHALL be ready for first flight within 10 minutes of unboxing by a child aged 10 following printed instructions only, with no internet access, tools, or prior RC experience required.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from STK session time need. 10-minute setup budget leaves 15 minutes for flying and packup within the 25-minute total session. If setup requires tools, downloads, or adult-only steps, the product fails the child-independence requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; performance; session-485; idempotency:sys-setup-time-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-010" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The ESC SHALL progressively reduce motor power when battery cell voltage drops below 3.3 V and SHALL cut motor power completely at 3.0 V per cell, while the transmitter SHALL provide an audible low-battery warning at the 3.3 V threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-002 (battery thermal runaway from deep discharge) and Battery Critical mode. Over-discharging LiPo below 3.0V causes copper dissolution and internal shorts on next charge. Progressive power reduction gives the pilot time to land rather than suffering sudden power loss at altitude.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-1; safety; session-485; idempotency:sys-low-voltage-cutoff-485">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-011" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane total flight-ready mass (airframe, LiPo pack, avionics, propulsion) SHALL not exceed 250 g in ready-to-fly configuration.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from STK-REQ-010. The 250g threshold is the EASA/CAA open-category micro UAS limit below which no registration, training, or operational approval is required. Exceeding this makes the product illegal to fly in UK, EU, and most CE/UKCA markets without regulatory action from the child's family. Mass budget also constrains design choices throughout — it is the primary driver for integrated ESC/BEC, EPP foam construction, and 2S LiPo selection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-1; session-490; idempotency:sys-total-mass-budget-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:SYS-REQ-012" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane SHALL display EN 71 Part 1 and ASTM F963 mandatory safety labelling on the airframe and packaging, including minimum age marking (8+), CE/UKCA marking, and propeller hazard warning visible at 50 cm distance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Derived from STK-REQ-012 and STK-REQ-009 (regulatory compliance). EN 71 Part 1 and ASTM F963 labelling are legal requirements for toy products sold in EU/UK/US markets. Missing CE/UKCA marking blocks retail distribution. Propeller warning label is specifically required because the propeller is a laceration hazard to fingers (H-004) and the warning label is the last line of defence after physical guards are impractical at sub-250g mass.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; regulated; sil-1; session-490; idempotency:sys-safety-labelling-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-008" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Following any unplanned ground contact, the Kids Remote Control Airplane product documentation SHALL require the user to: (a) disconnect the LiPo battery before handling the aircraft; (b) inspect the battery for visible swelling, deformation, or puncture; (c) not resume flight if any physical deformation is detected; and (d) place the battery in the included LiPo safety pouch on a non-flammable surface if deformation is found. The product kit SHALL include a LiPo safety pouch.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Addresses H-002 (LiPo thermal runaway after crash): the primary failure pathway is internal cell damage from crash impact that is not visible externally. Thermal runaway typically initiates 3-15 minutes after damage. No existing SYS requirement addressed the user-facing safe-state procedure after unplanned ground contact. The safe state for H-002 requires battery disconnected and isolated in fireproof container — this requirement makes that safe state reachable by a non-technical user. FAA post-crash guidance for UAVs mandates battery disconnection before approach.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="86">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; sil-2; safety; h-002; session-497; validation; idempotency:sys-postcrash-battery-safety-497">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-011" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The Kids Remote Control Airplane transmitter SHALL operate for a minimum of 5 continuous hours from 4 x AA alkaline batteries at 25 degrees C, measured from full cells to low-battery warning activation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-001 requires sessions up to 25 minutes; 5-hour transmitter battery life ensures the transmitter is not the limiting factor across a full afternoon of multi-session use, preventing mid-flight power loss that could cause loss of control.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="100">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="system; transmitter; power; session-499; idempotency:sys-tx-battery-life-499">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-001" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-001: Apply 1000 us PWM to ESC idle, then step to 2000 us. Measure time from command edge to 80% of max RPM using optical tachometer. Test at 7.4V nominal. Pass criterion: &lt;250 ms over 5 trials. Fail if any trial exceeds 300 ms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bench test eliminates airframe variables. Optical tachometer gives ±50 RPM accuracy — sufficient for 80% RPM threshold measurement. 5 trials cover unit-to-unit variation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion-subsystem; session-486; idempotency:ver-sub001-esc-response-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-002" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-002">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-003: Mount propeller on 6000 RPM powered rig (tip velocity ~12-15 m/s). Strike rotating propeller with rigid steel cylinder of 50mm diameter. Measure post-impact fragment kinetic energies using ballistic pendulum. Pass criterion: all fragments &lt;0.4J, no fragment mass &gt;5g with velocity &gt;5 m/s. Sample: 3 propellers per production lot.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="EN 71 Part 1 Clause 8.6 propeller impact method. Rigid cylinder simulates worst-case rigid obstacle contact geometry. Ballistic pendulum is the standard fragment energy measurement method per EN 71 test protocol.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion-subsystem; session-486; idempotency:ver-sub003-prop-frangible-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-003" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-004: Power ESC from variable bench supply. Set 100% throttle, then reduce supply voltage per-cell below 3.3V in 50mV steps while monitoring motor speed. Record: (a) speed reduction onset voltage, (b) motor cutoff voltage, (c) time from 3.0V threshold to motor stop. Pass criteria: (a) at 3.3V, (b) cutoff at 3.0V +/-0.1V, (c) &lt;100ms. Failure criterion: any motor cutoff above 3.15V/cell (premature) or below 2.9V (late — reversal risk).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SIL 2 safe state test must be deterministic. Variable bench supply simulates battery voltage drop under load without battery risk during test. Tight cutoff tolerance (±0.1V) ensures neither premature flight termination nor deep discharge. Results must be documented in safety case.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion-subsystem; sil-2; safety; session-486; idempotency:ver-sub004-lvc-safestate-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-004" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-007: Connect ESC to motor test stand with current probe on one phase. Set throttle to 50%. Measure switching frequency on oscilloscope (target 8-32kHz), phase current (target &lt;20A), and dead time between high-side off and low-side on (target &gt;200ns). Pass: all three parameters in range over 60-second run.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Integration test for ESC-motor interface. Oscilloscope measurement of dead time directly proves shoot-through prevention — the primary failure mode causing ESC destruction and motor runaway.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion-subsystem; session-486; idempotency:ver-ifc007-esc-motor-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-005" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-008: Mount propeller on motor shaft per specification torque. Apply 20N axial extraction force via load cell for 10 seconds. Apply 0.3Nm torsional torque via torque wrench. Pass criterion: zero slippage or disengagement in either test. Test 5 motor/prop assemblies per lot.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Prop retention failure at flight speed is a SIL 2 hazard. Static load test at 2x normal operating load provides confidence margin against dynamic in-flight loads and vibration-induced loosening.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion-subsystem; session-486; idempotency:ver-ifc008-motor-prop-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-006" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-007 (control latency bench test): Connect TX stick position encoder to logic analyser. Apply step input to right stick (&gt;1% travel). Measure time delta from mechanical input to first new packet on RF output. Test 10 samples across full travel. Pass criterion: 90th percentile latency &lt;20ms. Fail if any measurement &gt;25ms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="This is the control latency bench test referenced as STK-001 in previous session context. Logic analyser measurement captures both MCU processing delay and RF packet timing. 10-sample statistical method accounts for FHSS hopping timing jitter.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radio-transmitter; session-486; idempotency:ver-sub007-tx-latency-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-007" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-007">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-008 (failsafe range test): Bind transmitter and receiver outdoors on a clear field. Fly or position receiver at 150m LOS. Record frame loss counter via receiver telemetry or data logger for 60 seconds at 50Hz nominal rate. Calculate frame loss percentage. Pass criterion: &lt;1% loss over 60s run. Repeat in three orientations (nose-on, broadside, tail-on). Fail if any orientation exceeds 2% loss.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Range test is the system-level integration test for the RF link. Three orientations cover antenna radiation pattern asymmetry. 60-second run at 50Hz gives 3000 frame opportunity sample — statistically robust for &lt;1% threshold detection (±0.2% confidence interval).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radio-transmitter; session-486; idempotency:ver-sub008-rf-range-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-008" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-008">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify end-to-end control loop: With aircraft in ground test stand (propeller removed), pilot applies full elevator-up and full throttle inputs simultaneously on transmitter. Measure elapsed time from TX stick input to (a) receiver output servo deflection and (b) motor RPM reaching 80% of maximum. End-to-end latency = time from TX input to both actuator responses. Pass criterion: &lt;50ms for control surface response, &lt;300ms for motor RPM. Test at 150m range with second operator monitoring aircraft.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="System-level integration test covering the complete TX-to-actuator signal chain. Tests two paths simultaneously: the digital control path (TX MCU -&gt; RF -&gt; FCE -&gt; servo) and the power path (ESC -&gt; motor). Provides single test evidence for SYS-REQ-002 end-to-end latency and SYS-REQ-001 motor performance under realistic radio range conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; integration; session-486; idempotency:ver-integration-e2e-486">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-009" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-009">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-002: Mount motor on load-cell test stand. Supply 7.4V nominal from a regulated bench supply. Attach the specified propeller. Apply full throttle command (2000us PWM). Record thrust readings at 1 Hz for 30 seconds. Pass criterion: minimum thrust reading ≥80g sustained over full test duration at ambient 25°C.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Load cell bench test isolates motor thrust from airframe and battery sag variables. 30-second test at full throttle confirms rated thrust at nominal voltage. Result directly validates the 80g minimum thrust specification without requiring flight-test infrastructure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ver-sub002-motor-thrust-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-010" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-006: Run motor and ESC assembly at 75 percent throttle (representative cruise setting) for 10 minutes in still air at ambient 25°C. Measure ESC case temperature with a contact thermocouple or IR thermometer at 30-second intervals. Pass criterion: ESC case temperature must not exceed 85°C at any measurement point during the 10-minute run.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="75 percent throttle for 10 minutes represents sustained cruise load without the intermittent duty reduction from bank angles and throttle modulation in flight. Still-air condition removes forced convection benefit, creating a worst-case thermal scenario. Contact or IR measurement at 30s intervals ensures peak temperature is captured before the measurement decays.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ver-sub006-esc-thermal-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-011" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-011">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-005: Weigh the complete propulsion subsystem (ESC, motor, propeller, motor mount screws, and electrical leads cut to installation length) together on a calibrated scale with 0.1g resolution. Pass criterion: total measured mass ≤45 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass budget compliance is most directly verified by weighing the actual subsystem assembly. 0.1g scale resolution is adequate for a 45g limit with 5% budget margin typical for component assemblies.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="71">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ver-sub005-propulsion-mass-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-012" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-012">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-009: During binding procedure, configure the transmitter failsafe output to elevator-neutral, rudder-neutral, and 20 percent throttle. Using a logic analyser on the receiver output, power off the transmitter. Confirm within 600ms (500ms trigger + 100ms margin) that receiver PWM outputs match the pre-configured failsafe values. Repeat with throttle-hold failsafe configuration. Pass: both configurations output correct values within timeout.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Failsafe configuration is safety-critical per SYS-REQ-004; functional testing is the only way to verify the specific failsafe values are stored and output correctly. The 600ms timeout window accounts for receiver frame-loss debounce timing.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ver-sub009-failsafe-config-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-013" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-013">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-005: Connect a fully charged 2S LiPo (8.4V) to the ESC power input. With motor running at 50 percent throttle, measure voltage at the ESC power input terminals using a calibrated DMM. Measure current using an inline current shunt. Verify voltage ≥6.0V under load and current ≤10A during the 30-second test. Pass if both measurements are within specification.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Power delivery interface must be verified under actual load conditions; static voltage measurement is insufficient. 50 percent throttle represents a realistic sustained cruise load. 6.0V minimum threshold at the ESC input prevents voltage sag below the minimum required for reliable commutation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ver-ifc005-power-propulsion-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-014" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-014: Inspect battery and ESC connectors visually for correct polarisation marking (red positive, black negative). Attempt to mate battery connector in reverse polarity — connector MUST be mechanically prevented from mating incorrectly. Verify connector is rated XT30 by confirming the imprint on the connector housing. Pass: correct markings present, reverse polarity mating physically impossible.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Reverse-polarity connection destroys the ESC and may cause battery fire; this is a safety-critical failure mode that must be prevented by physical design, not procedure. Visual inspection and physical mating test confirm polarisation protection without requiring powered test.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="idempotency:ver-ifc014-connector-polarity-487">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-005" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-016">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-013: Power the ESC from a variable bench supply set to 8.4V (full charge). Drive motor to 50% throttle. Ramp supply voltage down at 0.1V/s per cell until 3.3V/cell is reached. Measure time from voltage threshold crossing to ESC initiating throttle reduction. Pass criterion: throttle reduction begins within 200 ms of 3.3V/cell crossing on either cell.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Safety-critical LVC test verifies that the protective mechanism activates before permanent cell damage occurs. 0.1V/s ramp rate represents realistic in-flight discharge under moderate load.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; sil-2; safety; session-488; idempotency:ver-sub013-lvc-power-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-006" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-017">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-010: Discharge new battery pack at 2.5A constant current (representing mean cruise power) from 8.4V until either LVC trips or terminal voltage reaches 6.6V. Record elapsed time. Pass criterion: runtime &gt;= 9.6 minutes (400mAh / 2.5A = 9.6min).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bench discharge test at representative cruise current measures actual capacity independent of ESC efficiency. 9.6min provides 20% margin over the 8-minute STK requirement to account for in-flight efficiency losses.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; sil-2; session-488; idempotency:ver-sub010-battery-capacity-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-019" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-019">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-015: Connect a 2S LiPo pack with one cell at 4.18V and one at 4.17V to the charger. Apply a bench supply at the charger input and initiate charge. Using a cell voltage meter, monitor each cell. Measure charger cutoff voltage at termination. Pass criterion: charge terminates when either cell reaches 4.20V to 4.22V, and current falls to below 23 mA before or at cutoff. Tested three times consecutively.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Safety-critical test for SIL-2 requirement. Three repetitions confirm the charger IC does not exhibit false-positive termination or overshooting the 4.21V limit on repeated cycles.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; sil-2; safety; session-488; idempotency:ver-sub015-charger-term-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-021" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-021">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-018: Bind transmitter to receiver. Power system on. Using oscilloscope, monitor receiver throttle output channel. Disable transmitter RF (power off transmitter). Record time from power-off to throttle channel reaching 1000us output. Pass criterion: throttle output reaches 1000us within 500ms. Verify elevator and rudder channels read 1500us. Repeated 5 times.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Failsafe timing test is safety-critical (SIL-1); five repetitions cover statistical variation in transmitter shutdown timing. Oscilloscope measurement eliminates observer reaction time error from manual stopwatch method.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; sil-1; safety; session-488; idempotency:ver-sub018-rx-failsafe-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-022" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-022">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-019: Mount aircraft in 3-axis gimbal. Apply maximum stick deflection on pitch axis. Use digital inclinometer to measure maximum achieved bank angle. Apply step disturbance (manual push) and measure recovery. Pass criterion: maximum bank angle does not exceed 47 degrees, recovery to within 5 degrees of level within 1 second.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gimbal test allows bank angle measurement without actual flight risk. 47-degree pass criterion (vs 45-degree requirement) provides 2-degree instrument tolerance. Recovery time test confirms stability augmentation is active rather than just limiting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; sil-1; session-488; idempotency:ver-sub019-gyro-stability-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-023" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-023">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-022: Load battery into aircraft. Drop aircraft nose-first from height of 5.1 m onto a grass surface (impact velocity at contact ~10 m/s, neglecting drag). Inspect battery tray retention latch and battery position post-impact. Pass criterion: battery remains in tray with latch closed. Test 3 units.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Drop test from 5.1m achieves 10 m/s impact per SYS-REQ-008 under gravity (v^2 = 2*g*h; h = v^2/2g = 100/19.6 = 5.1m). Grass surface matches specified impact medium. Three units provide sample coverage for manufacturing variation in foam density and latch torque.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; airframe-subsystem; sil-1; safety; session-488; idempotency:ver-sub022-crash-integrity-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-024" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-024">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-024: Connect servos and drive each to full deflection via servo tester. Measure control surface deflection from neutral to full using a digital calliper. Pass criterion: both elevator and rudder surfaces achieve minimum 10 mm deflection from neutral position.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct calliper measurement of control surface deflection at full servo travel confirms the pushrod geometry and surface hinge position achieve the required authority.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; airframe-subsystem; session-488; idempotency:ver-sub024-control-travel-488">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-025" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-025">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-004: Bind transmitter and receiver. Using a logic analyser on the receiver CPPM/PWM output, apply full stick deflection on each axis in sequence. Measure time from last RF frame transmission edge (TX RF monitor pin) to first PWM output edge change. Pass criteria: frame rate ≥50 Hz, end-to-end latency ≤20 ms on each of 3 channels, FHSS channel count ≥15 hops observed in 60-second window.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-004 mandates 50 Hz frame rate and 20ms latency across the RF control link — the primary human-in-the-loop constraint. Direct measurement at the receiver PWM output is the only way to verify end-to-end latency inclusive of FHSS packet scheduling, receiver decode, and PWM generation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radio-transmitter; session-489; idempotency:ver-ifc004-control-link-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-026" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-026">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-006: Connect oscilloscope to ESC signal wire. Command 0% throttle, then 100% throttle via transmitter. Measure PWM pulse widths and verify 1000 us idle / 2000 us full-throttle at 50 Hz repetition rate. Measure time from stick command to motor-stop command acknowledged (motor current drops to &lt;0.5 A). Pass criteria: PWM within ±10 us of spec; motor-stop acknowledgement within 200 ms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-006 defines the throttle signal specification and 200ms motor-stop response critical to failsafe operation — the ESC must cut motor power within 200ms of FCE receiving a failsafe command, which traces to SYS-REQ-004 (500ms total failsafe time budget).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion; session-489; idempotency:ver-ifc006-fce-esc-pwm-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-027" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-027">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-011: Apply variable resistive load to ESC BEC output from 0 mA to 1500 mA in 100 mA steps. Record output voltage at each step with a calibrated multimeter. Using a load switch, apply a 0-to-1500 mA step load change and capture output transient with oscilloscope at 1 MHz sample rate. Pass criteria: steady-state output 4.75 V–5.25 V across all load points; transient excursion returns to within 5% of 5.0 V within 2 ms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-011 governs the 5V power rail supplying the FCE receiver, MCU, and servos. Voltage outside 4.75–5.25 V causes servo malfunction; slow transient recovery causes glitches during motor throttle changes that generate BEC switching noise spikes.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; session-489; idempotency:ver-sub011-bec-voltage-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-028" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-028">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-014: Connect a calibrated constant-current load to the power distribution PCB output. Ramp current to 8 A and start a stopwatch. Measure time to fuse trip (current drops to &lt;0.1 A). Reset fuse by removing power for 30 seconds. Repeat 3 times. Pass criteria: fuse interrupts current at 8 A within 1 second on all 3 attempts; fuse resets and restores conduction to within 10% of initial resistance after cool-down.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-014 is the primary over-current protection for the 2S LiPo wiring harness. A fuse that fails to trip at 8 A within 1 second will allow sustained short-circuit current that risks wiring insulation fire — directly mitigating H-002 (LiPo thermal runaway).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; sil-2; session-489; idempotency:ver-sub014-ptc-fuse-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-029" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-029">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-016: Fully discharge a 450 mAh 2S LiPo to 3.0 V/cell. Connect to charger set at 0.5C (225 mA). Record charge start time and monitor charger green LED transition. Pass criteria: green LED activates within 90 minutes of charge start; cell voltages at termination both within 4.17-4.22 V.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-016 defines the maximum acceptable charge time from fully depleted — 90 minutes at 0.5C is the safety-limited maximum charge rate for LiPo cells in consumer products per IEC 62133-2.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; sil-2; session-489; idempotency:ver-sub016-charge-time-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-030" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-030">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-017: Connect fully depleted 2S LiPo to charger in ambient illumination of 1000 lux (measured with light meter). Observe LED colour from 1 m distance. Allow charge to complete. Pass criteria: red LED clearly visible during charging; green LED clearly visible at 1 m at 1000 lux upon charge completion; no intermediate off or flicker states.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-017 ensures the parent can verify charging status without approaching the charging area — a safety practice for LiPo monitoring that reduces risk of unattended fire (H-002).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; session-489; idempotency:ver-sub017-led-indicator-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-031" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-031">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-020: Mount each servo in turn on a test jig with a 100 g-cm load arm. Apply a 1000 us to 2000 us PWM step from a servo tester at 5.0 V supply. Measure time from PWM command edge to servo horn reaching full deflection with oscilloscope and end-stop contact switch. Pass criteria: deflection in &lt;100 ms for both elevator and rudder servos.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-020 governs servo response speed; servos slower than 100ms per full deflection cause sluggish control response that makes trimming difficult for novice pilots and may cause oscillations in gusty conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; session-489; idempotency:ver-sub020-servo-speed-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-032" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-032">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-021: Weigh the complete FCE assembly (receiver, FCE board with MCU and IMU, elevator servo, rudder servo, and all interconnect wiring) on a calibrated precision balance (0.1 g resolution). Pass criteria: total mass &lt;=25 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-021 enforces the FCE mass allocation within the 250 g total system budget (SYS-REQ-001). Inspection alone insufficient — each component's mass may individually comply while exceeding the subsystem budget when assembled.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; session-489; idempotency:ver-sub021-fce-mass-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-033" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-033">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-012: With ESC powered from 7.4V bench supply, measure BEC output with oscilloscope under loads of 100mA, 300mA, and 500mA (FCE+servos). Measure ripple at each load. Pass: output 5.0V ±0.25V; ripple &lt;50mV peak-to-peak at all load points.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-012 defines the BEC output to FCE supply quality; ripple exceeding 50mV can corrupt SPI communications from IMU to FCE MCU and cause servo position jitter — both compromise flight stability.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; flight-control-electronics; session-489; idempotency:ver-ifc012-power-to-fce-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-034" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-034">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-018: Connect logic analyser to SPI/I2C bus between IMU and FCE MCU. Run FCE firmware for 60 seconds. Capture bus traffic and measure sample rate and noise density from raw gyro data. Pass: sample rate &gt;=1 kHz; noise density &lt;0.05 deg/s per sqrt-Hz computed from 1000-sample static dataset.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-018 defines the gyro data path that feeds the stability augmentation loop; sample rate below 1 kHz causes aliasing in the 250 Hz control loop, and noise density above the limit causes oscillation in the stabiliser output at low airspeed.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; session-489; idempotency:ver-ifc018-imu-spi-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-035" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-035">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-023: Assemble the complete airframe (fuselage, wing, tail assembly, control surfaces, pushrods, and all structural hardware, excluding electronics and battery). Weigh on a calibrated balance (0.1 g resolution). Pass: total mass &lt;=80 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-023 enforces the airframe mass allocation within the 250g total system budget. The airframe is the largest variable-mass component; exceeding 80g directly reduces the available budget for electronics and battery, forcing compromise on performance or safety.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="71">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; airframe; session-489; idempotency:ver-sub023-airframe-mass-489">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-036" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-036">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-001: Conduct user trial with 5 children aged 8-14 with no prior RC experience. Record time from opening box to completing first sustained flight circuit and returning to landing. Pass criterion: median session time under 25 minutes with all 5 participants achieving controlled flight.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-001 is a stakeholder-level scenario requirement that can only be verified by direct demonstration with target users. Analysis and inspection cannot confirm that a real child can complete the workflow — only a live trial can. 5 participants gives statistical confidence that the requirement is met across the age range, not just for one child.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-490; idempotency:ver-stk-001-user-trial-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-037" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-037">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-002: In the same user trial as VER-REQ-036, observe each participant's first unassisted flight session. Pass criterion: all 5 participants successfully execute at minimum one banked turn, one climb, and one descend manoeuvre without crashing within a 10-minute flight window; no participant requires hands-on assistance from an adult to maintain controlled flight.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-002 requires demonstration that a real novice can execute manoeuvres — this cannot be verified by analysis of control response data alone. The requirement is about pilot experience, not control surface performance, so a user trial is the only valid method. Piggybacking on the VER-REQ-036 trial avoids duplicate test overhead while maintaining separation of acceptance criteria.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-490; idempotency:ver-stk-002-novice-flight-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-038" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-038">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-011: Weigh the complete flight-ready aircraft (airframe, battery, avionics, propulsion, all hardware installed) using a calibrated scale with 1g resolution. Pass criterion: total mass does not exceed 250 g. Record measurement and serial number at final assembly QC.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct physical measurement of the mass budget compliance is the only reliable method — dimensional analysis cannot account for manufacturing variation in foam density, adhesive application, or component selection from approved alternatives.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; session-490; idempotency:ver-sys-011-mass-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-039" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-039">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-012: Inspect pre-production sample using EN 71 Part 1 and ASTM F963 labelling checklists. Verify presence of CE/UKCA mark, age marking (8+), and propeller hazard warning on airframe and packaging. Measure propeller warning label at 50 cm to confirm legibility. Pass: all mandatory labels present, no mandatory label missing or illegible.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Labelling compliance is a binary pass/fail inspection requirement. Pre-production sample inspection catches tooling/artwork errors before production commitment. Regulatory non-compliance cannot be corrected post-production without a product recall.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; regulated; session-490; idempotency:ver-sys-012-labelling-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-040" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-040">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-025: Connect ESC to motor test stand. Apply 1500 us throttle via signal generator. Disconnect PWM signal wire while monitoring motor RPM with optical tachometer. Pass criterion: motor RPM drops to zero within 150 ms of PWM disconnection (100ms detection + 50ms response); ESC resumes full commanded RPM output within 500 ms of PWM signal restoration, within plus-or-minus 200 RPM of the commanded setpoint.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-025 requires ESC to respond to PWM loss within 150ms and restore full output within 500ms. Replaces vague 'normal operation' with quantified RPM recovery: plus-or-minus 200 RPM tolerance is derived from 3 percent speed regulation spec at hover throttle. Without a measurable recovery criterion, a pass would not demonstrate restoration of controlled flight thrust.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion; sil-2; session-490; idempotency:ver-sub-025-esc-failsafe-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-041" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-041">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-026: Mount aircraft in 3-axis gimbal with FCE powered in beginner mode. Command 60-degree bank via transmitter and measure actual maximum bank achieved. Apply manual bank disturbance and measure recovery time. Pass criterion: maximum commanded bank does not exceed 45 degrees; recovery to within 5 degrees of trim within 500 ms of disturbance removal.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gimbal test allows quantitative measurement of angle limiting performance in a controlled ground environment, capturing the same flight dynamics as airborne test without crash risk. 500ms recovery window is conservative relative to the 250Hz loop rate capability.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; sil-1; session-490; idempotency:ver-sub-026-stability-aug-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-042" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-042">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-027: Bind transmitter to receiver. Set failsafe channel positions. Power aircraft without transmitter active. Measure time from power-on to failsafe PWM output and verify servo positions match pre-programmed failsafe values. Also verify: power on transmitter then turn off and measure time to failsafe activation. Pass criterion: failsafe activates within 600 ms of RF loss (500ms timeout + 100ms response); throttle channel outputs 1000 us; elevator outputs 5-degree nose-down trim value.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bench test with radio link simulation is the only controlled method to measure 500ms timeout compliance. Flight test would require deliberate signal loss in a live flight environment which is hazardous and unrepeatable.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; sil-2; session-490; idempotency:ver-sub-027-receiver-failsafe-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-043" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-043">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-028: Install LiPo battery in aircraft. Drop aircraft from 0.5m height onto concrete (nose-first, 10 m/s equivalent impact). Inspect battery bay after impact. Pass criterion: LiPo battery remains in bay (no ejection), battery connector remains mated, no exposed wiring, no sharp edges on battery bay accessible to fingers.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Drop test from 0.5m onto hard surface approximates a 10 m/s nose-first impact deceleration load for a 250g aircraft. This is the minimum test for battery retention compliance before certification to EN 71 Part 1. Physical inspection is required because analytical methods cannot predict connector pull-out under shock loading without FEA.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; airframe-subsystem; sil-2; session-490; idempotency:ver-sub-028-battery-retention-490">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-044" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-044">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-002: Mount brushless DC motor on load-cell test stand with 6x4 propeller fitted. Supply 7.4V nominal from bench supply. Command 100% throttle via ESC calibration mode. Measure thrust continuously for 10 seconds. Pass criterion: minimum measured thrust &gt;= 80 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct measurement on load-cell stand is the only method that can verify a specific thrust value. A 20% thrust shortfall results in insufficient climb rate for safe recovery.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion-subsystem; session-491; idempotency:ver-sub-002-thrust-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-045" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-045">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-005: Weigh complete propulsion assembly (ESC, motor, propeller, wiring to XT30 connector) on calibrated scale with 0.1 g resolution. Pass criterion: total mass &lt;= 45 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass measurement is the only valid verification. Wiring harness mass varies by assembly. A propulsion assembly &gt;45 g pushes total aircraft mass above the 250 g SYS-REQ-011 budget.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="71">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; propulsion-subsystem; session-491; idempotency:ver-sub-005-mass-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-046" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-046">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-006: Mount ESC in nominal airframe thermal environment (enclosed fuselage, no forced airflow). Run motor at 75% throttle for 10 minutes at 40 degrees Celsius ambient. Measure FET package surface temperature at minute 10. Pass criterion: case temperature &lt;= 85 degrees Celsius.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Thermal limits must be tested in situ because airflow in a foam fuselage differs substantially from open-air bench tests. ESC overtemperature &gt;85 degrees C degrades MOSFET switching and risks PCB delamination.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; esc; sil-2; session-491; idempotency:ver-sub-006-thermal-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-047" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-047">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-009: Bind transmitter and receiver. Configure failsafe (throttle 0%, servos neutral). Power cycle receiver only. Block TX RF for 2 seconds. Measure receiver output channels. Pass criterion: during signal loss, receiver outputs match pre-configured failsafe values within 50 us; throttle channel &lt;= 1050 us.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Failsafe bind configuration cannot be verified by inspection alone — end-to-end signal interruption with channel measurement is required. An incorrectly stored failsafe (throttle at 50%) would result in a runaway aircraft, which is hazard H-001.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radio-transmitter; sil-2; session-491; idempotency:ver-sub-009-failsafe-bind-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-048" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-048">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-010: Charge LiPo to full (4.20V/cell). Run motor at 75% throttle continuously until ESC low-voltage cutoff activates. Measure elapsed time. Pass criterion: elapsed time &gt;= 8 minutes before cutoff trigger. Record cell voltage vs time at 30-second intervals.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Run-time verification under representative load is required. Manufacturer capacity ratings are at low C rates; actual 10C discharge capacity can be 10-20% lower. An 8-minute flight time is the minimum safe window for a child to complete a flight circuit without mid-air power loss.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; session-491; idempotency:ver-sub-010-capacity-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-049" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-049">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-012: Weigh a fully charged LiPo battery pack (both cells at 4.20V) on a calibrated scale with 0.1 g resolution. Pass criterion: total mass &lt;= 30 g.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass measurement is the only valid verification for a physical part. A LiPo &gt;30 g consumes more than 12% of the 250 g SYS-REQ-011 mass budget for a single component, leaving insufficient margin for other subsystems.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="71">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; session-491; idempotency:ver-sub-012-battery-mass-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-050" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-050">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-013: Discharge 2S LiPo until cell 1 is at 3.4V. Connect to powered ESC/motor bench setup. Reduce load until cell 1 drops below 3.3V. Measure time from 3.3V threshold crossing to ESC low-voltage cutoff activation. Pass criterion: cutoff engaged within 200 ms of 3.3V threshold crossing.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Low-voltage cutoff timing is safety-critical. A delay &gt;200ms allows cell voltage to continue falling toward catastrophic 2.5V deep-discharge threshold. Deep discharge of a LiPo below 3.0V/cell causes permanent electrode damage and increases fire risk (hazard H-002).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; sil-2; session-491; idempotency:ver-sub-013-lvc-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-051" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-051">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-015: Discharge 2S LiPo to 3.7V/cell. Connect to charger under test. Monitor individual cell voltages at 1-second intervals. Charge at rated current until termination. Pass criteria: charger terminates when the first cell reaches 4.20V +-0.01V, OR when charge current drops below 22 mA. Post-test: both cell voltages &lt;= 4.21V.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Overcharge termination accuracy is safety-critical. Failure to terminate at 4.20V leads to LiPo thermal runaway. Testing with external cell voltage logging provides independent verification. A 10 mV overcharge tolerance is the accepted industry margin per IEC 62368-1.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; sil-2; session-491; idempotency:ver-sub-015-charge-terminate-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-052" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-052">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-018: Bind TX and RX. With aircraft powered, interrupt RF signal (Faraday bag or power off TX). Start stopwatch. Measure time until ESC output drops to 1000 us throttle and elevator/rudder channels return to 1500 us neutral using servo analyser. Pass criterion: failsafe outputs active within 500 ms of signal interruption; throttle &lt;= 1050 us.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Receiver failsafe timing is the primary flight safety mitigation for signal loss events (hazard H-001). A 500 ms timeout is derived from maximum safe glide distance: at 10 m/s, 500 ms = 5 m travel. Direct PWM output probing excludes servo mechanical latency from the measurement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; sil-2; session-491; idempotency:ver-sub-018-rx-failsafe-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-053" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-053">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-019: Mount aircraft in 3-axis test stand. Power FCE and radio link. Command step input exceeding +-45 degrees bank. Measure resulting bank angle response with angular rate sensor. Record gyro loop closure timing on logic analyser. Pass criteria: bank angle excursion does not exceed +-45 degrees from level; loop cycle time &lt;= 50 ms MCU-to-servo-update.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Stability augmentation must be tested under dynamic inputs because static analysis cannot capture closed-loop behaviour. The +-45 degree limit prevents tip-stall in trainer mode for novice pilots; the 50 ms loop rate is the minimum for effective proportional correction of typical roll rates for this aircraft size.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; session-491; idempotency:ver-sub-019-stability-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-054" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-054">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-022: Assemble complete aircraft with LiPo battery installed and latched. Drop aircraft nose-first from height producing 10 m/s impact velocity (approximately 5.1 m) onto grass surface. After impact, inspect battery bay without opening hatch. Pass criterion: battery tray latch remains closed; battery does not eject; no connector disconnection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery ejection on impact (hazard H-002) must be tested as a physical crash simulation because structural analysis of foam cannot predict latch retention under dynamic loading. The 10 m/s velocity represents a realistic unrecoverable nose-dive from typical training altitude.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; airframe-subsystem; sil-2; session-491; idempotency:ver-sub-022-crash-latch-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-055" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-055">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-024: Mount each control surface servo and linkage in final build configuration. Command servo to neutral (1500 us PWM). Command full deflection (2000 us). Measure mechanical travel of each control surface with calipers. Pass criterion: neutral-to-full deflection travel &gt;= 10 mm for both elevator and rudder; achieved with 5 mm horn input.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Control surface travel directly determines pitch and yaw authority. Insufficient travel (&lt;10 mm) prevents the aircraft from achieving the turn and pitch rates required for SYS-REQ-002. Measurement must be done in as-built configuration as linkage geometry can reduce theoretical travel by 15-30%.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; airframe-subsystem; session-491; idempotency:ver-sub-024-control-travel-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-056" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-056">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-029: Recruit 2 participants aged 10-12 with no prior RC experience. Provide only the included printed quick-start guide. Time from box opening to first throttle application (flight ready). Pass criterion: both participants complete all pre-flight steps in &lt;= 10 minutes with no adult assistance; no tools, device pairing, or internet access required.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Setup time and ease-of-use cannot be verified by inspection of the quick-start guide. Direct user testing with the target demographic is required because cognitive load for children differs significantly from adult engineers. Failure to meet 10-minute setup removes the core product differentiator from STK-REQ-001.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; session-491; idempotency:ver-sub-029-setup-time-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-057" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-057">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-001: Connect USB power supply (5V, 2A rated) to charger USB input. Apply 5.5V (overvoltage) and verify no damage to DUT via fuse blow or crowbar activation. Apply reverse polarity via adapter — confirm no DUT damage. Measure input current at rated load. Pass criterion: input current &lt;= 2A at 5V; reverse polarity and 2.5A overcurrent cause protective shutdown without DUT damage.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="USB input protection must be tested for reversal and overcurrent because children may connect incorrect cables or chargers. A field failure where a reversed cable damages the charger creates a replacement cost and potential fire risk from unprotected lithium charging circuits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; session-491; idempotency:ver-ifc-001-usb-input-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-058" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-058">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-002: Mount aircraft in wind tunnel or tow test. Increase airspeed from 0 to 15 m/s at sea level air density. Measure lift and drag at 5, 8, 10, 12, and 15 m/s. Alternatively: tethered flight test at measured airspeeds with load cell. Pass criterion: positive lift measured at 5 m/s; lift-to-drag ratio &gt;= 4:1 at cruise speed (8-10 m/s).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Aerodynamic performance cannot be verified by analysis without CFD. A lift-to-drag ratio below 4:1 results in insufficient glide and excessive power consumption, reducing flight time below the 8-minute target and increasing crash risk from energy depletion.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; airframe-subsystem; session-491; idempotency:ver-ifc-002-aerodynamics-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-059" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-059">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-003: Review FCC Part 15 or equivalent CE RED declaration of conformity issued by transmitter/receiver module manufacturer, confirming 2.400-2.4835 GHz FHSS operation on minimum 40 channels, EIRP &lt;= 1 W. Inspect channel-hop pattern via spectrum analyser capture over 30-second capture period. Pass criterion: documented declaration present; spectrum shows hopping across minimum 40 distinct channels.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RF compliance with FCC Part 15.249 is verified by manufacturer certification — individual product testing is cost-prohibitive and not required where the RF module is a certified sub-assembly. FHSS channel count is verified by spectrum observation to confirm the module behaves as declared.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radio-transmitter; session-491; idempotency:ver-ifc-003-rf-compliance-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-060" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-060">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-005: Connect fully charged 2S LiPo (8.4V) to ESC via XT30 connector. Command full throttle. Measure voltage at ESC input connector during full-throttle run. Measure wire temperature with IR sensor at minute 5. Pass criterion: voltage drop at max current &lt;= 0.2V; ESC input voltage &gt;= 6.0V at all throttle levels; 18 AWG wire surface temperature &lt;= 60 degrees Celsius at 8 A.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Voltage drop at the power interface directly affects motor performance. A drop &gt;0.2V at 8A represents a 2.7% efficiency loss and may cause under-voltage motor stumble. 18 AWG wire ampacity verification prevents insulation overheating under sustained high-current draw.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; session-491; idempotency:ver-ifc-005-power-interface-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-061" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-061">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-009: Connect logic analyser to MCU commutation output pin and gate driver output pin. Command 50% throttle. Measure propagation delay from MCU output edge to gate driver output edge. Pass criterion: propagation latency &lt; 150 ns across all 6 commutation phases; logic levels confirm 3.3V CMOS signals (VOH &gt;= 2.8V, VOL &lt;= 0.4V).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gate driver propagation latency &gt;150 ns introduces timing error into BEMF zero-crossing detection, causing commutation mis-timing at high motor speeds. At 6000 RPM (100 Hz electrical), 150 ns represents 1.5 degrees of timing error — within acceptable tolerance for smooth commutation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; esc; session-491; idempotency:ver-ifc-009-gate-driver-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-062" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-062">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-010: Connect RF module to antenna via feedline under test. Sweep VNA from 2.400 to 2.4835 GHz. Measure VSWR and return loss at 10 frequency points across the band. Pass criterion: VSWR &lt; 2.0:1 at all measurement frequencies; feed impedance 50 ohms +-10% (45-55 ohms) across band.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Antenna VSWR &gt;2.0:1 results in &gt;11% reflected power, reducing effective TX power and range below the 150 m SYS-REQ-007 requirement. VNA measurement is the standard characterisation method for RF interface impedance matching.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radio-transmitter; session-491; idempotency:ver-ifc-010-antenna-vswr-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-063" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-063">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-011: Connect FCE PWM output to elevator servo and servo analyser in parallel. Command FCE to output 1000 us, 1500 us, and 2000 us pulses at 50 Hz. Measure actual pulse width and signal frequency on servo analyser. Measure output voltage with oscilloscope. Pass criterion: pulse width within +-20 us of commanded value; frequency 50 Hz +-2 Hz; logic level 3.3V CMOS (VOH &gt;= 2.8V).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="PWM timing accuracy directly determines servo positioning accuracy and control surface deflection. A +-50 us timing error at 50 Hz corresponds to +-2.5 degrees of elevator deflection error, which affects pitch stability. Logic level compatibility ensures reliable servo trigger.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; session-491; idempotency:ver-ifc-011-elevator-pwm-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-064" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-064">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-013: Connect FCE PWM output to rudder servo and servo analyser. Command 1000 us, 1500 us, and 2000 us at 50 Hz. Measure pulse width and logic level. Pass criterion: pulse width within +-20 us of commanded; frequency 50 Hz +-2 Hz; 3.3V CMOS logic (VOH &gt;= 2.8V).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Rudder PWM accuracy determines yaw control authority. Derived from same rationale as IFC-REQ-011 elevator interface — a +-50 us timing error corresponds to +-2.5 degrees of rudder deflection error, affecting turns for novice pilots.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; session-491; idempotency:ver-ifc-013-rudder-pwm-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-066" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-066">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-015: Inspect LiPo balance tap connector type and pin-out. Compare against JST-XH 3-pin 2S standard wiring diagram. Attempt incorrect connection (3S connector) to confirm physical incompatibility. Pass criterion: connector identified as JST-XH 3-pin; pin wiring matches negative/cell1+/cell2+ sequence; 3S JST-XH connector cannot mate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Balance tap connector pin-out determines whether the charger monitors individual cells correctly. An incorrect wiring sequence causes the charger to read incorrect cell voltages and may overcharge one cell while undercharging another, causing premature capacity degradation or cell reversal.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; session-491; idempotency:ver-ifc-015-balance-tap-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-067" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-067">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-016: Assemble FCE PCB on rubber-damped standoffs in airframe. Apply 10g shock via calibrated drop test per IEC 60068-2-27 test Ea. Measure PCB displacement from rest position using dial indicator. Measure vibration attenuation ratio at 50 Hz and 100 Hz using accelerometers on PCB and airframe. Pass criterion: PCB displacement &lt;= 2 mm under 10g shock; vibration attenuation &gt;= 20 dB at frequencies &gt;50 Hz.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE PCB vibration isolation is required to prevent IMU measurement corruption from motor and propeller harmonics (typically 50-200 Hz for this propulsion system). 20 dB attenuation ensures IMU noise floor remains below 0.1g, sufficient for gyro-assisted stability augmentation at SUB-REQ-019 loop rate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; flight-control-electronics; session-491; idempotency:ver-ifc-016-vibration-isolation-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-068" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-068">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-017: Evaluate transmitter joystick ergonomics with 5 child participants aged 10-14. Measure spring-centering return force using calibrated push-pull gauge on each joystick axis. Verify throttle trim spring-return with thumb. Pass criterion: centering force 100-200 gf on both sticks; throttle trim spring returns to center when released; all joystick axes reachable with thumbs without stretch by 10th percentile child hand size.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Joystick spring force outside 100-200 gf range causes control difficulties for children — too light causes unintended inputs; too heavy causes fatigue and imprecise control. Child hand ergonomics must be verified with the actual demographic, not adult testers, as hand spans differ by 30-40%.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; radio-transmitter; session-491; idempotency:ver-ifc-017-joystick-ergonomics-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-069" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-069">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-019: Connect AC mains supply (100V AC and 240V AC, 50 Hz and 60 Hz) to charger AC input. Measure input power and output power at rated load (100 mA charge current). Pass criterion: charger operates correctly at both 100V and 240V AC; power conversion efficiency &gt;= 90% at rated output (measured as output power / input power).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="AC mains compatibility across global voltage ranges (100-240V) must be tested to prevent charger failure in overseas markets. Efficiency &gt;= 90% is required to prevent excessive heat generation in the enclosed charger housing, which could create a surface temperature hazard for child contact.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; session-491; idempotency:ver-ifc-019-ac-input-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-070" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-070">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-020: Connect 2S LiPo to battery monitoring circuit. Apply 6.0V (min), 7.4V (nominal), 8.4V (full charge) via bench supply. Measure ADC input voltage and MCU calculated battery voltage. Pass criterion: measured voltage accuracy within +-50 mV of applied voltage at all three set points; resistor divider scales 8.4V to &lt;= 3.3V ADC input.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery voltage measurement accuracy determines when the low-voltage warning and cutoff are triggered. A +-50 mV error at the 3.3V monitoring threshold represents +-100 mV error on the actual cell voltage, which could cause premature cutoff or delayed warning — the latter contributing to deep discharge events (hazard H-002).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; session-491; idempotency:ver-ifc-020-voltage-monitoring-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-071" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-071">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-021: Inspect power distribution PCB for XT30 polarised connector rating marking and PTC fuse placement. Attempt reverse polarity connection with XT30 adapter. Apply 30A from bench supply and confirm PTC fuse rating. Pass criterion: XT30 connector rated &gt;=30A continuous; PTC fuse present on positive rail before branch point; reversed polarity physically prevented by connector keying.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Reclassified from Inspection to Test during validation session 497: the procedure includes applying 30 A from a bench supply to confirm PTC fuse rating under live current — this is a functional test, not a passive inspection. For a SIL-2 requirement, Test is the appropriate verification method. Visual inspection of XT30 markings and reverse-polarity mating attempt are also included as part of the same test procedure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; power-system; sil-2; session-491; idempotency:ver-ifc-021-power-dist-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-072" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-072">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-022: Connect AC-DC power supply module output to charger IC supply input. Measure output voltage under no-load and rated-load (500 mA) conditions. Measure ripple voltage with oscilloscope AC-coupled at rated load. Pass criterion: DC output voltage 12V +-0.5V at all load points; ripple &lt; 100 mV peak-to-peak at rated load.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The AC-DC module output voltage tolerance directly affects balance charger IC operating range. A ripple &gt;100 mV peak-to-peak superimposes AC noise on the charger reference, causing cell voltage measurement error and potential premature or missed termination. 100 mV ripple limit is consistent with charger IC datasheet requirements.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; ground-charging-system; session-491; idempotency:ver-ifc-022-acdc-output-491">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-073" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-073">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-001: Weigh assembled aircraft in ready-to-fly configuration on calibrated scale. Pass criterion: mass ≤250 g. Conduct outdoor flight test in calm conditions (&lt;2 m/s wind), recording airspeed with pitot probe. Pass criterion: sustained level flight at 5–15 m/s for minimum 60 s without altitude loss &gt;2 m.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct system-level acceptance test for the primary performance requirement. Mass measurement is pre-flight; flight envelope test confirms the airspeed range is achievable with the as-built aircraft.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; session-492; idempotency:ver-sys001-flight-envelope-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-074" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-074">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-002: With aircraft in bench rig, connect logic analyser to transmitter stick ADC output and receiver PPM/serial output. Deflect throttle stick from centre to full travel. Measure time from stick ADC edge to final PWM command at servo output. Pass criterion: end-to-end latency not exceeding 50 ms on all 3 channels, measured over 20 samples.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Control latency directly drives flight safety — excessive lag causes PIO (pilot-induced oscillations). 50 ms is derived from the human motor reaction threshold for novice pilots.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; session-492; idempotency:ver-sys002-ctrl-latency-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-075" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-075">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-003: With aircraft on 3-axis bench fixture, inject simulated angular rate via gyro rate table. Command bank angle demand exceeding 45 degrees. Confirm FCE MCU outputs corrective elevator/rudder command limiting bank to 45 degrees. In flight trial, apply full aileron input; confirm bank does not exceed 45 degrees in beginner mode.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Stability augmentation is the primary mechanism preventing novice pilots from entering unrecoverable attitudes. Test must confirm both the bench-level algorithm response and the in-flight physical result.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; session-492; idempotency:ver-sys003-stability-aug-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-076" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-076">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-004: Power aircraft and transmitter. Confirm all control surfaces deflect to commanded positions within 50 ms and motor responds to throttle within 100 ms (pre-test baseline). Disable transmitter RF output (power off). Measure time to motor cutoff using current probe on ESC power lead. Measure descent rate with barometric altimeter during glide. Pass criterion: motor cutoff within 500 ms of signal loss; descent rate not exceeding 3 m/s in established glide.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 specifies 500ms failsafe activation on signal loss. The amended pre-test baseline replaces vague 'confirm normal flight control response' with quantified surface deflection latency (&lt;50ms) and throttle response (&lt;100ms) traceable to IFC-REQ-004, establishing that the control loop was functional before the failsafe test sequence. Without this baseline, a passing failsafe test could be on an already-degraded control system.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; sil-2; session-492; idempotency:ver-sys004-failsafe-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-077" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-077">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-005: Connect deeply discharged 2S LiPo to charger. Monitor each cell voltage and battery surface temperature with calibrated thermistor during charge cycle. Confirm charger terminates current when any cell reaches 4.20 V within 25 mV. Separately, heat battery surface to 45 degrees C with thermal pad while charging; confirm charger disconnects charging current within 5 s.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="LiPo overcharge termination is a SIL-2 safety requirement per the hazard register. Cell overvoltage and thermal runaway are the primary LiPo fire mechanisms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; sil-2; session-492; idempotency:ver-sys005-charger-termination-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-078" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-078">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-006: Mount propeller on motor at rated RPM (6000 rpm). Strike rotating blade with calibrated force gauge rod at a perpendicular direction. Increase applied force in 1 N increments from 5 N. Confirm blade yields or fragments before force reaches 15 N. Pass criterion: no laceration hazard edges after test; force at yield not exceeding 15 N.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Propeller blade contact with a child's hand at rotation speed is a primary injury hazard (severity: severe). EN 71 and ASTM F963 require demonstration that propeller does not transmit injurious forces.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; sil-2; safety; session-492; idempotency:ver-sys006-prop-frangibility-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-079" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-079">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-007: Conduct outdoor range test on open field. Operate 3 co-channel 2.4 GHz WiFi access points within 50 m of transmitter. Fly aircraft to 150 m range. Record frame loss rate via telemetry link over 120 s. Pass criterion: frame loss rate below 1 percent at 150 m with WiFi interference active.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RF link reliability at operating range is the primary mechanism preventing unintended signal loss failsafe activation during normal flight. 150 m derives from STK-REQ-007 operational range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; session-492; idempotency:ver-sys007-rf-link-range-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-080" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-080">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-008: Drop assembled aircraft nose-first from 5 m height onto level grass surface (equivalent to 10 m/s impact velocity). Inspect aircraft immediately after impact. Pass criterion: LiPo battery remains fully retained; no electrical wiring is exposed; no sharp edges created that would fail a 7N finger drag test per EN 71-1.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Crash safety is a SIL-1 requirement. Battery ejection during crash creates LiPo fire hazard; exposed wiring creates electrocution risk; sharp edges cause lacerations during post-crash handling by a child.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; sil-1; safety; session-492; idempotency:ver-sys008-crash-impact-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-081" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-081">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-009: Recruit 5 children aged 10 with no prior RC experience. Provide printed instructions only (no verbal assistance). Record time from box opening to first takeoff attempt. Pass criterion: all 5 participants achieve ready-for-flight state within 10 minutes; no tools, internet, or external help used.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="First-flight readiness within 10 minutes is STK-REQ-001 — the primary out-of-box experience requirement. User trial with age-appropriate participants is the only valid verification method.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; session-492; idempotency:ver-sys009-unboxing-trial-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-082" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-082">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-010: Connect aircraft to variable bench supply simulating 2S LiPo discharge. Reduce per-cell voltage from 3.5V through 3.3V to 3.0V in 50 mV steps at 30 s intervals. Monitor motor RPM via tachometer and transmitter audio output. Pass criterion: motor power reduction begins at 3.3V per cell; motor stops completely at 3.0V per cell; audible transmitter warning activates within 2 s of first cell reaching 3.3V.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="LVC cutoff protects the LiPo from deep discharge damage and is a SIL-2 safety requirement. Audible warning is the primary pilot notification mechanism for battery state since there is no telemetry display.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; sil-2; safety; session-492; idempotency:ver-sys010-lvc-audible-492">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-083" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-083">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-003: With the aircraft powered and ready to fly, a parent unfamiliar with RC aircraft performs the pre-flight check using only the aircraft's onboard indicators. Record time to determine: (a) battery state (full/low), (b) control link status (bound/unbound), (c) airframe condition (secure/damaged). Pass criterion: parent correctly identifies all three states within 60 seconds without verbal instruction, over 5 trials with 5 different parents.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-003 derives from the parent supervisor role — the safety case relies on a non-expert adult being able to confirm airworthiness before flight. Failure to meet this requirement means the aircraft may be flown with a low battery, unbound link, or damaged airframe without adult awareness, directly increasing risk of uncontrolled flight (H-001).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk003-parent-precheck-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-084" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-084">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-004: Connect a deeply discharged 2S LiPo to the charger. Monitor: individual cell voltage (accept: ±5mV resolution), temperature via calibrated thermistor on battery surface, and fault indicators. Trigger a simulated fault by placing one cell at 4.25V. Pass criteria: charger terminates charge and audible alarm sounds within 5 seconds; LED flashes red; fault condition (a) — cell overvoltage: charge terminates when any cell reaches 4.25V input; fault condition (b) — thermal: attach 50°C thermal pad to battery surface while charging, confirm charger disconnects charging current before battery surface temperature exceeds 45°C. Both fault scenarios must pass.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Updated to align thermal cutoff acceptance criterion with SYS-REQ-005 (45°C threshold). Previous criterion of &lt;60°C was 15°C above the specified threshold and would have permitted a non-compliant charger to pass the test. Battery thermal runaway initiates above 60°C; the 45°C cutoff provides the required safety margin. Thermal pad simulation replaces the less controllable previous method.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk004-charging-safety-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-085" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-085">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-005: Weigh aircraft in flight-ready configuration (all components). Measure max airspeed in level flight at 100% throttle using Doppler radar gun or video frame analysis over 50m course. Calculate KE = 0.5mv^2. Pass: KE at max measured airspeed less than 12 J. Test at zero wind, ISA standard conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-005 is the primary bystander injury prevention requirement. At 12J, an impact is broadly equivalent to a 0.5kg mass falling 2.4m — below the threshold for serious injury per EN 71 impact analysis. Direct measurement of mass and max airspeed with KE calculation is the only valid verification method.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk005-kinetic-energy-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-086" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-086">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-006: Bind transmitter to receiver. Power aircraft in flight test configuration. Fly to 20m altitude and 50m range. Cut transmitter power abruptly. With stopwatch, record time to motor cutoff. Observe descent trajectory. Pass: motor cuts within 500ms of TX power loss, aircraft enters nose-down glide at less than 15 degrees AoA, lands within 30m horizontal from loss-of-link point.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-006 is the primary uncontrolled-flight-away safety requirement. Demonstration at altitude with range is the only way to validate real failsafe behaviour including aerodynamic response — bench test cannot replicate the flight dynamics component.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk006-failsafe-descent-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-087" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-087">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-007: Purchase all aircraft components from at least two separate retail sources (hobby shop or online retailer). Assemble aircraft from purchased components using only the tools specified in the assembly manual. Pass: aircraft assembled and flight-ready within the time specified in the manual, with no bespoke or custom-manufactured parts required.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-007 ensures the product remains manufacturable and repairable using off-the-shelf parts. A demonstration purchase and build proves that the design has not inadvertently specified proprietary parts that create supply chain dependence.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk007-cots-build-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-088" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-088">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-008: Simulate common crash damage: (a) break propeller at hub, (b) crack wing foam 20mm, (c) detach control linkage. Using only the provided repair kit (CA glue, spare propeller, linkage clips), repair each fault. Pass: all three repairs completed and aircraft returned to flight-ready state within 30 minutes by a person who has read the repair section of the manual.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-008 is the field repairability requirement — a key differentiator from disposable toys. The 30-minute repair criterion was derived from typical park or field session duration; longer repairs mean the flying session is lost.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk008-field-repair-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-089" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-089">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-009: Submit pre-production samples to accredited test laboratory for EN 71 Parts 1-3 and ASTM F963 compliance testing. Pass: laboratory issues certificate of conformity for all applicable test clauses. Retain test reports in product technical file.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="EN 71 and ASTM F963 are mandatory legal requirements for toy safety in EU and US markets. Third-party laboratory certification is required by both standards for products in these categories — self-declaration is not sufficient for CE marking or CPSC compliance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk009-toy-safety-cert-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-090" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-090">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-010: Weigh the complete flight-ready aircraft (airframe, LiPo battery at full charge, all installed electronics, propeller, hardware) on a calibrated scale (resolution 1g). Pass: total mass strictly less than 250g. Verify at three production samples from initial manufacturing run.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-010 is the regulatory threshold for UAS exemption from FAA Part 107 and EU UAS category A1 registration. Exceeding 249g removes the product from the registration-exempt category, creating a regulatory barrier for purchasers. Three-sample test accounts for unit-to-unit mass variation in foam moulding.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk010-mass-limit-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-091" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-091">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-011: Open a sealed production sample. Inventory all items against the published packing list: aircraft, transmitter, LiPo battery, balance charger, spare propeller (x2), safety manual, quick-start guide. Confirm all items fit in the original box without additional packaging. Pass: all items present, box can be resealed, no loose components.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-011 ensures the product is self-contained at first purchase — the buyer must not need to source additional components before the first flight. Failure here creates immediate return-to-retailer events and negative safety outcomes if a child attempts to fly with a missing charger or no spare propeller.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="43">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk011-packaging-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-092" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-092">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-012: Inspect production sample under 500 lux diffuse white fluorescent illumination (ISO 3664 print-viewing standard). Verify age rating (8+), multilingual safety warnings, and regulatory symbols are legible at 0.5m without magnification. Compare label content against EN 71 Part 1 Annex A and ASTM F963-17 Section 4.1 mandatory label checklists. Pass: all mandatory text and symbols present, minimum 2mm font height, visible on all primary packaging faces.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-012 requires legible labelling per EN 71 and ASTM F963. Replaces vague 'normal retail display lighting' with the specific 500 lux ISO 3664 illuminance standard used in retail print inspection. 500 lux is the minimum recommended general retail illuminance per ISO 8995-1; using this value ensures the test represents the worst realistic viewing condition at shelf level, not an artificially bright laboratory setting.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk012-labelling-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-093" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-093">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-013: Fly aircraft in measured crosswind of 14-16 knots (7.2-8.2 m/s, verified with anemometer). Demonstrate: sustained level flight upwind, crosswind, and downwind legs each 30 seconds. Reduce throttle to 60% and verify aircraft remains controllable (responsive to full deflection, no departure from controlled flight). Pass: all legs completed, no unintended stall or ground impact.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-013 is the environmental envelope requirement. The 15-knot wind limit was chosen as the threshold for typical park flying conditions. Controlled-flight demonstration at wind limit verifies structural margins, power budget, and gyro stabilisation all function together at the boundary of the operational envelope.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk013-wind-flight-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-094" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-094">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-014: Submit transmitter to accredited radio test laboratory for FCC Part 15 or CE RED (Radio Equipment Directive) type approval testing. Verify: operating frequency 2.400-2.4835 GHz, FHSS modulation, EIRP less than 1W (30 dBm), frequency hopping sequence random with minimum 15 channels. Pass: type approval certificate issued, certificate references correct product model.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-014 is a mandatory radio regulatory requirement in all target markets. FCC type approval and CE RED Declaration of Conformity are required before sale. EIRP and FHSS requirements derive from spectrum access conditions for the 2.4 GHz ISM band in both US and EU regulations.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-493; idempotency:ver-stk014-radio-approval-493">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-009" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-095">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify post-crash battery safety protocol: (a) Inspect final production quick-start guide and printed safety card for mandatory post-crash battery disconnection instruction and swelling/deformation inspection checklist. Verify LiPo safety pouch is present in production sample kit. (b) Conduct usability test with 3 parents: simulate post-crash scenario, instruct parent to follow guide, observe whether battery is disconnected and inspected before resuming flight. Pass criteria: all three elements present in documentation; all 3 participants disconnect battery and inspect for damage without prompting; LiPo safety pouch present in production sample.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-013 requires post-crash documentation and kit contents — both must be verified by inspection (documentation content) and demonstration (user behaviour). Behaviour observation is required because a printed instruction that users do not follow provides no safety benefit; the demonstration confirms the instruction is clear enough to be followed without coaching. Three-parent sample provides statistical confidence across non-RC-experienced users.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; system; sil-2; safety; h-002; session-497; idempotency:ver-sys013-postcrash-protocol-497">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-096" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-096">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-001 (session time scenario): Recruit a child aged 10 with no prior RC experience. Provide sealed product box and printed instructions only. Record time from box opening to aircraft airborne on first flight. Record time from landing to packed in case. Pass criteria: time-to-flight at most 10 minutes; full session including two flights and teardown at most 25 minutes; child performs all steps without adult physical assistance (parent permitted verbal direction only).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-001 requires a 25-minute park session including setup and teardown, achievable by a child aged 8-14. Direct usability observation with a representative user is the only method that validates the setup complexity claim; document review and analysis cannot reveal whether a child can physically unpack, charge-check, and launch the aircraft within the time budget. Three-trial average eliminates first-flight novelty effects.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-498; idempotency:ver-stk001-session-time-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-097" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-097">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-002 (basic manoeuvres novice test): Recruit three children aged 8-12 with no prior RC flight experience. Conduct a 15-minute familiarisation flight per child. Observe ability to complete straight-and-level flight, banked left turn, banked right turn, and figure-eight without instructor physical input on transmitter. Pass criteria: all three children achieve stable straight-and-level for at least 10 seconds within the 15-minute session; at least two of three successfully complete one coordinated turn each direction.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-002 requires that flight controls are learnable by a novice child with no prior RC experience. Only a direct user study with representative users can validate learnability. The success criterion (2 of 3 completing turns) is consistent with introductory aviation training benchmarks and accounts for individual learning rate variation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-498; idempotency:ver-stk002-novice-flight-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-098" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-098">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-003 (parent status check): With aircraft powered and transmitter bound, parent (non-RC user) inspects onboard LED indicators and product manual for 60 seconds. Pass criteria: parent correctly identifies battery charge state (full/low), RF link state (bound/unbound), and motor arm state (armed/disarmed) using only onboard LEDs and product card, without prompting from test operator.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-003 requires that a parent can verify safe operating state using only onboard visual indicators and the product manual. Usability testing with a representative non-technical adult is the only valid method. 60 seconds is the expected interaction time for pre-flight checks per the Weekend Park Flight scenario.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-498; idempotency:ver-stk003-parent-check-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-099" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-099">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-005 (kinetic energy limit): Measure total flight-ready mass on calibrated scales (aircraft, battery, propeller). Record maximum level-flight airspeed under zero-wind conditions using GPS ground speed logger over five runs. Calculate kinetic energy as 0.5 x mass x velocity^2. Pass criteria: kinetic energy at maximum measured airspeed is less than 12 J.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-005 limits kinetic energy at any achievable airspeed to below 12 J to ensure injury risk from collision is below the threshold for serious blunt force injury (established in EN 71-1 impact energy limits). Direct measurement of both mass and airspeed is required because analytical estimation of maximum airspeed in uncontrolled conditions has too high an uncertainty for a safety-critical claim.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; sil-1; session-498; idempotency:ver-stk005-kinetic-energy-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-100" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-100">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-009 (toy safety compliance): Submit production samples to an accredited third-party test laboratory for EN 71 Parts 1, 2, and 3, and ASTM F963 testing. Pass criteria: all tests pass without deviation; test certificates received from the accredited laboratory; certificate numbers recorded in the verification record.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-009 requires compliance with EN 71 Parts 1-3 and ASTM F963 — legal market access requirements in the EU and US respectively. Third-party accredited laboratory testing is mandatory under the EU Toy Safety Directive 2009/48/EC for products with electrical components and lithium batteries. Internal test results are not accepted as conformance evidence by market surveillance authorities.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; regulated; session-498; idempotency:ver-stk009-toy-safety-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-101" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-101">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-010 (flight-ready mass below 250 g): Weigh complete flight-ready aircraft (airframe, battery, propeller, all electronics) on a calibrated scale with resolution of 1 g or better. Pass criteria: flight-ready mass is at most 249 g on three production samples drawn from different manufacturing lots.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-010 requires mass below 250 g to remain exempt from UAS registration requirements under EU Regulation 2019/947 and equivalent jurisdictions. Direct measurement on multiple production samples is required because manufacturing variation can add 1-5 g across lots; testing a single sample would not represent worst-case mass distribution.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; regulated; session-498; idempotency:ver-stk010-mass-limit-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-102" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-102">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-011 (complete system packaging): Open a sealed production sample and inventory all items against the manifest in the product manual. Pass criteria: aircraft, transmitter, LiPo battery (charged), USB or mains charger, at least two spare propellers, LiPo safety pouch, CA glue strip, and multilingual quick-start card are all present; no assembly tools required to achieve flight-ready state.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-011 requires the complete system packaged with all accessories needed for flight. Inspection of a production sample against the manifest is the appropriate verification method because the requirement is about kit completeness, not functional performance. Testing a production sample (rather than a pre-production kit) catches omissions introduced during packaging line configuration.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-498; idempotency:ver-stk011-kit-contents-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-103" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-103">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-013 (wind envelope): Conduct 10-minute flight test on a day with measured sustained wind speed of 12-15 knots (verified by calibrated anemometer). Pilot performs complete circuit, left turns, right turns. Pass criteria: aircraft maintains controlled flight throughout; no unrecoverable departure from controlled flight; at least one successful circuit completed per direction.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-013 requires controlled flight up to 15 knots and controlled descent (but not manoeuvre) in 16-25 knots. Direct flight testing in representative wind is the only method to validate the aerodynamic control authority claim. Simulation or analysis cannot predict actual stability margins for a low-cost foam aircraft where as-built surface tolerances affect lift and drag.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; session-498; idempotency:ver-stk013-wind-test-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-104" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-104">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-014 (RF coexistence): Operate aircraft in an environment with at least 5 co-located 2.4 GHz Wi-Fi access points measured by spectrum analyser. Maintain 150 m line-of-sight flight for 5 minutes while a co-user operates a second identically-configured aircraft. Pass criteria: measured frame loss rate on the primary aircraft remains below 1 percent throughout; no loss-of-link event occurs.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-014 requires the FHSS link to co-exist with Wi-Fi and other RC aircraft. Only a live RF environment test with controlled co-channel interference sources (Wi-Fi APs and a second aircraft) can validate the FHSS channel diversity claim of SUB-REQ-032. Spectrum analyser confirms the test environment meets the interference level required to stress the FHSS algorithm.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; sil-1; session-498; idempotency:ver-stk014-rf-coexist-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-105" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-105">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify STK-REQ-012 (safety labelling): Inspect a production sample aircraft and transmitter against the EN 71 Part 1 and ASTM F963 mandatory labelling checklist. Pass criteria: age rating (8+) present on packaging and aircraft fuselage; warning symbols and text present in at least English, French, German, and Spanish; CE/UKCA/FCC markings present on transmitter; all text is legible at 100 mm reading distance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-012 requires mandatory safety labelling on all product surfaces. Inspection is the appropriate verification method for labelling requirements — testing cannot confirm text content. Multilingual requirements are regulatory obligations under EU Toy Safety Directive and CA Prop 65; failure to include all required markings results in market withdrawal.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; stakeholder; regulated; session-498; idempotency:ver-stk012-labelling-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-106" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-106">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-023 (bind protocol exclusivity): Bind transmitter A to receiver. Power on transmitter B (identical make and model). Command full throttle from transmitter B. Pass criteria: receiver rejects all control frames from transmitter B; motor remains at idle; bound-transmitter-identity LED remains lit green; receiver does not enter failsafe during the 30-second transmitter B test period.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-023 requires the receiver to refuse control from all transmitters except the bound one. This is a direct functional test of the bind protocol exclusivity claim, which is the primary mitigation for H-006 (RF cross-binding). Transmitter B must be of the same make and model to test the worst-case same-frequency scenario.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; interface; sil-1; session-498; idempotency:ver-ifc023-bind-exclusivity-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-107" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-107">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-024 (RSSI-triggered failsafe): Bind transmitter and receiver. Monitor RSSI output on receiver telemetry port with oscilloscope. Incrementally attenuate RF path using calibrated RF attenuators until link quality drops. Pass criteria: RSSI updates at a minimum of 10 Hz; failsafe activates (motor idle, servos neutral) within 500 ms of RSSI falling below the configured threshold; pilot control of all axes (rudder, elevator, motor throttle) is fully restored within one frame period (22 ms at 45 Hz) after RSSI rises above threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-024 specifies RSSI-triggered failsafe and re-link restoration. Replaces vague 're-link restores normal control' with a quantified criterion: all-axes (rudder, elevator, motor) restore within one 22ms frame period at the 45Hz update rate specified in IFC-REQ-004. Without enumerating which axes must restore, a partial restoration (e.g., motor only) would pass the test, leaving the aircraft uncontrollable during recovery.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; interface; sil-1; session-498; idempotency:ver-ifc024-rssi-failsafe-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-108" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-108">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-030 (stick encoder resolution): Connect joystick output to 12-bit logic analyser. Sweep stick through full range in 1 mm increments. Pass criteria: a minimum of 1024 distinct PWM values observed across the full travel range; ADC sample rate confirmed at or above 100 Hz; no missing steps larger than 2 counts observed in the sweep.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-030 requires 10-bit (1024 step) stick resolution at 100 Hz. A logic analyser sweep of the full stick travel directly counts distinct output values and confirms the ADC rate. This test cannot be replaced by specification inspection because ADC non-linearity and mechanical dead-band can reduce effective resolution below the nominal bit depth.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; subsystem; radio-transmitter; session-498; idempotency:ver-sub030-encoder-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-109" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-109">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-034 (MOSFET VDS and Rds-on): Review ESC BOM and component datasheet for the MOSFET part number. Confirm VDS(max) is at least 20 V, ID at 60°C is at least 10 A, and Rds-on(max) is at most 8 milliohms. Pass criteria: all three parameters met on the selected MOSFET datasheet; component part number matches BOM; two physical production samples measured for Rds-on using 4-wire milliohm measurement below 10 milliohms.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-034 specifies MOSFET electrical ratings. Datasheet review (Analysis) is used for VDS and ID ratings as these cannot be easily measured in the assembled circuit. Rds-on is verified by direct 4-wire measurement on production samples because it is sensitive to bond wire resistance and assembly variation that may not match datasheet typical values.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; subsystem; propulsion-subsystem; session-498; idempotency:ver-sub034-mosfet-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:VER-REQ-110" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-110">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SUB-REQ-035 (gate driver dead-time): Connect dual-channel oscilloscope probes to high-side and low-side gate pins of one MOSFET half-bridge. Set ESC to 50 percent throttle. Pass criteria: dead-time interval (both gates at logic low simultaneously) is at least 100 ns measured on a minimum of 20 consecutive commutation events; no overlap (both gates high simultaneously) observed in any captured event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-035 is a safety requirement (H-002 shoot-through mitigation). Oscilloscope measurement of gate signals on the production PCB is the only reliable method to verify dead-time because gate driver IC datasheet values are nominal and board parasitics (trace inductance, gate resistor tolerance) can reduce effective dead-time by 20-50 ns.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ubiquitous">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-pattern</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-INTEGER THE-VALUE="57">
            <DEFINITION><ATTRIBUTE-DEFINITION-INTEGER-REF>attr-qaScore</ATTRIBUTE-DEFINITION-INTEGER-REF></DEFINITION>
          </ATTRIBUTE-VALUE-INTEGER>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verification; subsystem; propulsion-subsystem; sil-2; session-498; idempotency:ver-sub035-deadtime-498">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-tags</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-012" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-111">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify SYS-REQ-013: Inspect production documentation for all four post-crash steps. Verify LiPo safety pouch is included in product kit. Conduct user trial with 5 parents after simulated crash. Pass criterion: 4 of 5 parents complete all steps within 3 minutes without guidance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Safety-critical requirement addressing LiPo thermal runaway risk after crash requires demonstration that non-technical parents can execute the procedure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-013" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-112">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-025: Connect oscilloscope to ESC MCU gate control output and gate driver output pins. Run ESC through full commutation cycle at rated speed. Confirm MCU output is 3.3V CMOS with rise time under 20 ns. Confirm gate driver output is 10-15V at MOSFET gate pins. Repeat across 0-50 degrees C range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Inadequate rise time causes shoot-through in the MOSFET bridge and out-of-range gate drive voltage causes either incomplete turn-on or gate oxide breakdown, both destroying the ESC.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      <SPEC-OBJECT IDENTIFIER="uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-014" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-113">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-ref</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Verify IFC-REQ-026: Connect logic analyser to joystick ADC output and RF module frame output. Move joysticks through full range at varying speeds. Confirm stick sample rate is at least 100 Hz and RF frame interval does not exceed 20 ms. Record 60 seconds of continuous data. Pass criterion: zero dropped frames and all frames contain updated channel values.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-text</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="A 100 Hz sample rate prevents stick movement aliasing and 50 Hz RF frame rate provides sufficient control bandwidth for responsive flight. Dropped frames cause perceptible control lag for the child pilot.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-rationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-verification</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-OBJECT-TYPE-REF>req-type</SPEC-OBJECT-TYPE-REF></TYPE>
      </SPEC-OBJECT>
      </SPEC-OBJECTS>
      <SPEC-RELATIONS>
      <SPEC-RELATION IDENTIFIER="rel-0" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-026</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-014</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-026 verified by logic analyser frame timing test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER validates joystick sample rate and RF frame timing through logic analyser bench test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-1" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-025</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-013</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-025 verified by oscilloscope signal integrity test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER validates ESC MCU to gate driver signal integrity through oscilloscope bench test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-2" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-012</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-013 verified by parent demonstration trial">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER validates post-crash battery safety protocol through documentation inspection and parent user trial">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-3" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-110</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gate driver dead-time oscilloscope test verifies ESC power management requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-010 requires ESC motor control; SUB-035 specifies 100ns dead-time; VER-110 validates dead-time prevents shoot-through by direct measurement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-4" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-109</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="MOSFET specification inspection verifies ESC power management requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-010 requires ESC battery protection; SUB-034 specifies MOSFET ratings; VER-109 validates component datasheet compliance by inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-5" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-108</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Stick encoder resolution test verifies proportional control accuracy">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-002 requires proportional control; SUB-030 specifies stick encoder resolution; VER-108 validates encoder captures full stick travel">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-6" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-107</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RSSI-triggered failsafe test verifies failsafe activation requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-004 requires failsafe on 500ms frame loss; IFC-024 specifies RSSI threshold triggering; VER-107 validates failsafe activates before complete link loss">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-7" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-106</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bind protocol exclusivity test verifies failsafe bind requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-004 requires failsafe on frame loss; IFC-023 specifies the bind exclusivity mechanism; VER-106 validates binding prevents cross-control">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-8" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-012</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-105</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Safety labelling inspection verifies safety labelling requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-012 requires EN71/ASTM mandatory labelling; VER-105 inspects production samples for correct age rating and safety marks">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-9" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-104</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RF coexistence test verifies FHSS control link requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-007 requires FHSS link at 150m with 1% frame loss; VER-104 validates performance in a congested 2.4GHz environment">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-10" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-103</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Wind envelope flight test verifies flight performance requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-001 defines the flight envelope; VER-103 tests controlled flight at the maximum specified wind speed">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-11" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-009</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-102</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Packaging completeness inspection verifies system readiness requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-009 requires all components for first flight; VER-102 validates that the production pack contains the complete system">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-12" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-011</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-101</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass measurement test verifies flight-ready mass requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-011 caps flight-ready mass at 250g; VER-101 weighs the complete aircraft to verify compliance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-13" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-100</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Toy safety compliance test verifies propeller and structural safety requirements">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-006 requires propeller safe fragmentation; VER-100 validates full EN71/ASTM toy safety compliance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-14" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-099</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Kinetic energy measurement verifies flight performance bounds">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-001 constrains airspeed; VER-099 measures kinetic energy to validate compliance with the kinetic energy limit">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-15" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-098</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Parent status check verifies failsafe and status visibility">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-004 requires failsafe and controlled descent; VER-098 validates parent can observe the safe operating state">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-16" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-097</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Novice manoeuvres test verifies proportional control requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-002 requires 3-channel proportional control; VER-097 validates that novice children can execute basic manoeuvres">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-17" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-009</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-096</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Session time scenario acceptance test verifies system readiness requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-009 requires 10-min setup readiness; VER-096 validates the full child session time from STK-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-18" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-026</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Joystick-to-RF module interface derives from proportional control channel requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires proportional control on at least 3 channels; IFC-REQ-026 defines the internal transmitter interface that samples stick position and packs channel values into each RF frame">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-19" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-025</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC MCU to gate driver electrical interface derives from ESC motor control requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 requires the ESC to manage motor power safely; IFC-REQ-025 defines the electrical interface between the control MCU and the gate driver, specifying the logic levels and timing needed for safe commutation">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-20" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-024</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RSSI-triggered failsafe interface derives from system failsafe requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 specifies failsafe on loss of frames &gt;500ms; IFC-REQ-024 defines the RSSI interface mechanism by which the receiver detects impending link loss and initiates the failsafe before frames actually cease">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-21" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-037</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE receiver CPPM output derives from proportional control channel requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires proportional control on at least 3 channels; SUB-REQ-037 allocates CPPM at 50 Hz as the signalling format that delivers all channels to the flight computer on a single wire">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-22" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-036</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC microcontroller commutation cycle time derives from ESC motor control requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 requires ESC to manage motor power; SUB-REQ-036 allocates the 20 µs commutation loop timing to the MCU, required for sensorless back-EMF at the motor RPM range">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-23" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-035</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC gate driver dead-time derives from ESC power management requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 requires ESC to protect the battery; SUB-REQ-035 allocates the shoot-through prevention mechanism to the gate driver, which is the primary protection against catastrophic MOSFET bridge failure">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-24" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-032</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RF Module transmit power and FHSS channel count derives from FHSS link performance requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-007 specifies &lt;1% frame loss at 150m; SUB-REQ-032 allocates to the RF module the specific EIRP ceiling and minimum channel count needed to achieve this">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-25" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-011</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-031</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Radio Transmitter subsystem battery life requirement derives from system transmitter battery requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-level transmitter battery requirement allocates to the Radio Transmitter subsystem specifying 4xAA battery chemistry and thermal condition">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-26" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-011</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Transmitter battery life requirement derives from child session time stakeholder need">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-001 requires a child to complete a 25-minute session; the 5-hour battery life at SYS level ensures multi-session availability without mid-flight transmitter power loss">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-27" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-023</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS failsafe derives to bind protocol exclusivity interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Failsafe requirement against unintended control sources requires a bind exclusivity interface between transmitter and receiver">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-28" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-034</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC throttle response derives to MOSFET component specification">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC response speed depends on MOSFET switching capability; VDS and Rds-on ratings constrain the switching performance envelope">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-29" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-033</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Failsafe system req derives to transmitter bind NVM requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="H-006 cross-binding is a form of control link failure; bind persistence prevents a foreign transmitter from seizing control">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-30" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-030</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 control latency derives to TX stick encoder resolution">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Stick encoder resolution directly implements the control loop contribution to the 50 ms end-to-end latency budget">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-31" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-008</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery safety stakeholder need drives post-crash inspection protocol">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-004 (battery charging with fault warnings) addresses pre-flight battery safety; SYS-REQ-013 extends this to post-crash battery safety — same stakeholder need, same hazard (H-002).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-32" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-009</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Post-crash battery safety protocol verified by documentation inspection and usability demonstration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct verification of SYS-REQ-013 by inspecting documentation completeness and observing user behaviour during simulated post-crash scenario.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-33" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-008</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Crash structural integrity requirement derives post-crash battery inspection protocol">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-008 covers physical containment after impact; the post-crash inspection requirement derives from the same crash scenario — physical containment alone does not prevent latent battery damage causing deferred thermal runaway (H-002).">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-34" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-012</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-094</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Post-crash battery safety protocol verified by documentation inspection and user behaviour test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct verification of the new SYS requirement by document inspection and usability demonstration.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-35" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-012</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Crash structural integrity requirement derives the need for post-crash battery inspection protocol">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-008 covers physical containment after impact; the new post-crash inspection requirement derives from the same crash scenario — physical containment alone does not prevent latent battery damage causing deferred thermal runaway.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-36" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-003</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB requirement verified by corresponding bench test VER entry">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Trace link missing despite VER entry referencing SUB-REQ-004 in text. Added during validation session 497 to ensure verification completeness.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-37" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-002</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB requirement verified by corresponding bench test VER entry">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Trace link missing despite VER entry referencing SUB-REQ-003 in text. Added during validation session 497 to ensure verification completeness.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-38" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-001</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB requirement verified by corresponding bench test VER entry">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Trace link missing despite VER entry referencing SUB-REQ-001 in text. Added during validation session 497 to ensure verification completeness.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-39" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:ARC-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-009</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Passive power distribution enables tool-free setup requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Passive power distribution PCB with polyswitch fuse enables field replacement without tools, directly satisfying the 10-minute readiness and no-tools setup requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-40" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:ARC-REQ-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="2S LiPo selection enables sustained level flight within mass budget">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="2S LiPo is the only cell chemistry and voltage combination that satisfies both thrust requirement and 250g mass budget; 1S lacks drive voltage and NiMH exceeds mass budget.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-41" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:ARC-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Physical transmitter architecture delivers proportional control requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Physical transmitter with mechanical gimbals delivers the proportional 3-channel control required; smartphone Bluetooth alternative fails on latency and haptic feedback grounds.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-42" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:ARC-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="EPP foam selection directly enables crash tolerance requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="EPP foam compressive absorption is the material mechanism that makes 10 m/s crash survivability feasible; no other material satisfies both crash tolerance and mass budget simultaneously.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-43" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:ARC-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Separate charging architecture enables per-cell monitoring requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Ground-based balance charger architecture is the physical realisation of the per-cell voltage monitoring and thermal cutoff requirement; onboard equivalent would violate mass budget.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-44" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:ARC-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC-BEC integration underpins LVC protection mechanism">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC-integrated BEC means the ESC hosts both motor drive and avionics power; its LVC logic is the physical mechanism implementing the battery cell voltage protection requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-45" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:ARC-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE integration decision enables gyro stability requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Integrated FCE board places receiver, gyroscope, and MCU on a shared 5V rail executing a 250Hz control loop, directly enabling gyro-assisted stability without inter-board latency.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-46" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-014</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-014</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Connector polarity keying verified by physical inspection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-014 verifies IFC-REQ-014 connector polarity by visual inspection and physical reverse-insertion test confirming XT30 housing keying prevents miswiring.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-47" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-059</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RF regulatory compliance verified by VER-REQ-059 spectrum test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-059 verifies IFC-REQ-003 RF regulatory compliance via both documentation review and physical spectrum analyser capture, providing stronger evidence than documentation alone.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-48" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-094</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="2.4 GHz ISM band regulatory compliance verified by VER-REQ-094 radio lab test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-094 validates SYS-REQ-007 by submitting the transmitter to an accredited radio test lab for FCC Part 15 or CE RED certification, confirming the FHSS control link meets regulatory limits.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-49" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-093</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Wind resistance and stability augmentation verified by VER-REQ-093 crosswind flight test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-093 validates SYS-REQ-003's stability augmentation by demonstrating controlled flight in measured 14-16 knot crosswinds — the system must maintain attitude within the ±45° bank limit during the test.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
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      <SPEC-RELATION IDENTIFIER="rel-50" LAST-CHANGE="2026-04-24T18:45:42.106Z">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="System-level verification for SYS-REQ-001">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires system-level flight envelope test and mass measurement that cannot be fully verified at subsystem level alone.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
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      <SPEC-RELATION IDENTIFIER="rel-70" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-075</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="System-level verification for SYS-REQ-003">
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        </VALUES>
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      <SPEC-RELATION IDENTIFIER="rel-71" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-074</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="System-level verification for SYS-REQ-002">
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        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
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      <SPEC-RELATION IDENTIFIER="rel-72" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-073</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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      <SPEC-RELATION IDENTIFIER="rel-73" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-079</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-006</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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      </SPEC-RELATION>
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-022</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-009</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-036</SPEC-OBJECT-REF></TARGET>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="User trial with children verifies first-flight-ready setup time requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-009 requires &lt;10min to first flight by child aged 10. VER-REQ-036 is the only direct test that can verify this requirement as it involves actual children performing the setup sequence.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
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      <SPEC-RELATION IDENTIFIER="rel-110" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-028</SPEC-OBJECT-REF></SOURCE>
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        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Drop test verifies battery bay retention under impact">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Physical drop test is required for EN 71 certification compliance and cannot be substituted by analysis">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
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      <SPEC-RELATION IDENTIFIER="rel-111" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-027</SPEC-OBJECT-REF></SOURCE>
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        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="RF loss bench test verifies receiver failsafe timing">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Controlled RF loss simulation is the only safe method to measure 500ms timeout compliance precisely">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
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      <SPEC-RELATION IDENTIFIER="rel-112" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-026</SPEC-OBJECT-REF></SOURCE>
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        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gimbal test verifies angle limiting performance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="3-axis gimbal provides controlled environment to measure angle limiting without flight risk">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-113" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-025</SPEC-OBJECT-REF></SOURCE>
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        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC bench test verifies PWM failsafe timing">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Controlled bench test is required to measure 100ms detection and 50ms response timing with precision not achievable in flight">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-114" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-012</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-039</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Label inspection verifies SYS-REQ-012 regulatory labelling">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Regulatory labelling compliance is a binary inspection pass/fail — no testing required">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-115" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-011</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-038</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass measurement verifies SYS-REQ-011 250g budget">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Physical mass measurement is the only reliable verification method for the mass constraint">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-116" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-012</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-012</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Safety labelling system req derives from stakeholder labelling requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-012 specifies label visibility for child awareness; SYS-REQ-012 adds the regulatory standards (EN 71, ASTM F963) and specific mandatory labels (CE/UKCA, age marking, propeller warning) that must be present to satisfy both the stakeholder intent and legal compliance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-117" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-011</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="250g mass budget system req derives from stakeholder mass constraint">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-010 states the stakeholder mass constraint; SYS-REQ-011 converts this to a verifiable system-level SHALL statement with specific mass value, enabling downstream allocation to subsystem mass budgets">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-118" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-009</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-029</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="System setup time requirement derives to complete-system integration">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-009 is a system-level integration requirement without a single owning subsystem; SUB-REQ-029 makes the design constraints explicit (snap-fit connectors, pre-bound factory TX/RX, single-page guide) that must be satisfied across multiple subsystems to achieve the 10-minute setup target">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-119" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-028</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery bay retention derives from impact resistance requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-008 requires no battery ejection during 10m/s impact; SUB-REQ-028 specifies the specific latched hatch mechanism and pull-out force that implements this requirement at the airframe component level">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-120" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-027</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Receiver failsafe output derives from system-level RF loss failsafe">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 specifies the system failsafe behaviour; SUB-REQ-027 decomposes the receiver's role in detecting RF loss and outputting pre-programmed failsafe channel values as the first hardware stage of the failsafe chain">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-121" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-026</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE stability augmentation derives from system gyro augmentation requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-003 requires angle limiting in beginner mode; SUB-REQ-026 allocates this to the FCE MCU with 250Hz loop rate, making the derivation explicit and traceable to the component responsible for implementation">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-122" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-025</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC PWM failsafe derives from system-level motor-cut failsafe">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 requires motor power cut on loss of control frames; SUB-REQ-025 specifies the ESC-level PWM loss detection and response that implements this system requirement for the propulsion component">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-123" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-023</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-035</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Airframe mass budget test at assembly level">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-023 enforces the 80g airframe allocation within the 250g system budget; VER-REQ-035 weighs the complete airframe assembly at the point of maximum mass (all structural components installed) to verify compliance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-124" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-018</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-034</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IMU-MCU bus sample rate and noise density test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-018 requires &gt;=1kHz sample rate and &lt;0.05 deg/s per sqrt-Hz noise density; VER-REQ-034 captures live bus traffic during operation to verify both parameters simultaneously from actual firmware execution.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-125" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-012</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-033</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="BEC output quality test for power-to-FCE interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-012 specifies BEC output voltage and ripple tolerance; VER-REQ-033 tests both parameters under representative FCE+servo loads that represent real operating conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-126" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-021</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-032</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE subsystem mass budget verification">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-021 enforces the FCE mass allocation within the 250g total budget; mass must be measured at assembly level since individual components can individually comply while exceeding the subsystem budget.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-127" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-020</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-031</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Servo deflection speed test under 100 g-cm load">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-020 requires &lt;100ms full deflection under 100 g-cm load; VER-REQ-031 uses a test jig with load arm and contact switch to measure actual deflection time under the specified load condition.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-128" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-017</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-030</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="LED colour and visibility test at 1m in 1000 lux">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-017 requires red-during-charging and green-at-completion visible at 1m in 1000 lux; VER-REQ-030 tests both states with the specified lighting conditions and distance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-129" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-016</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-029</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Charge time measurement from depleted to 95% capacity at 0.5C">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-016 sets 90-minute charge time limit at 0.5C; VER-REQ-029 times the complete charge cycle with cell voltage verification at termination to confirm both timing and proper balance charging.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-130" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-014</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-028</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="PTC fuse interruption time test at 8A">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-014 mandates 1-second fuse trip at 8A to prevent LiPo wiring fire; VER-REQ-028 measures trip time with 3 repetitions to verify consistency of the polyswitch thermal mechanism.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-131" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-011</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-027</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="BEC voltage regulation and transient response test">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-011 requires 4.75-5.25V across 0-1500mA load range with 2ms transient recovery; VER-REQ-027 applies the full load sweep and a step load change with oscilloscope capture, testing both steady-state and dynamic compliance.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-132" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-026</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="PWM signal and motor-stop latency test for FCE-ESC interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-006 specifies PWM signal parameters and 200ms motor-stop acknowledgement; VER-REQ-026 measures both with oscilloscope at the ESC signal wire, verifying the complete FCE-to-ESC-to-motor response chain.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-133" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-025</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bench test for transmitter-receiver control link latency and frame rate">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-004 mandates &lt;=20ms latency and &gt;=50 Hz frame rate on the RF control link; VER-REQ-025 directly measures both parameters at the receiver PWM output, which is the only authoritative measurement point.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-134" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-023</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Airframe mass limit derives from overall flight performance mass budget">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires flight at 5-12 m/s; staying within the 250g all-up mass constrains the airframe to 80g per the mass budget in SUB-REQ-023.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-135" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-017</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Charge status LED signals charge completion per safe charging protocol">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 requires automatic charge termination; SUB-REQ-017 provides the visible indication that this termination has occurred, completing the safe charging feedback loop.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-136" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-021</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FCE mass limit derives from flight performance mass budget">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 flight performance requires all-up mass control; SUB-REQ-021 allocates 25g to electronics as part of the mass budget to achieve it.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-137" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-012</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery mass constraint derives from flight performance and total mass budget">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires flight at 5-12 m/s; achieving this at low power requires all-up mass to stay below 250g, which forces the 30g battery mass limit in SUB-REQ-012.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-138" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-020</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Servo response speed enables proportional control within loop timing">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires proportional control; SUB-REQ-020 specifies the servo speed that must be achieved for those control inputs to translate into flight manoeuvres within the aircraft's response envelope.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-139" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-014</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Short-circuit protection derives from battery safety requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 covers battery safety; SUB-REQ-014 addresses wiring short-circuit risk that exists because SYS-REQ-005 requires protection of the LiPo from all fault conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-140" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-024</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-024</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Calliper measurement verifies 10mm control surface deflection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct physical measurement is the most reliable method to verify a geometric requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-141" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-023</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-022</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="3-unit drop test verifies 10 m/s crash battery retention">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Drop from 5.1m is the practical method to achieve a controlled 10 m/s impact velocity for a test.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-142" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-024</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Control surface travel enables flight envelope manoeuvring">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires flight at 5-12 m/s; SUB-REQ-024 specifies the minimum control authority needed to manoeuvre within that envelope, and exists because the flight performance requirement demands sufficient aerodynamic control.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-143" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-022</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery tray retention on impact implements system crash integrity">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-008 specifies the 10 m/s impact and battery retention outcome; SUB-REQ-022 is the direct decomposition of this to the airframe structural test requirement.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-144" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-022</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-019</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gimbal test verifies 45-degree bank limit and recovery">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gimbal test provides repeatable measurement of the stability augmentation function without flight-test risk.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-145" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-021</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-018</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="5x failsafe timing test verifies 500ms threshold">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Repeated oscilloscope measurement is the only way to confirm the 500ms threshold is met consistently across transmitter power-down scenarios.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-146" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-019</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gyro mixing algorithm implements system stability augmentation">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-003 requires gyro-assisted 45-degree bank limit; SUB-REQ-019 decomposes this to the MCU loop closure rate and axis coverage, which are the implementation parameters for that constraint.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-147" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-018</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Receiver failsafe implements system-level control-loss response">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 mandates failsafe descent on frame loss; SUB-REQ-018 specifies the 500ms threshold and output state at the receiver level, which is the mechanism by which that system behaviour is realised.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-148" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-020</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-022</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Oscilloscope test verifies PSU output voltage and ripple within spec">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Direct measurement under load confirms the interface parameters are met.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-149" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-019</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-015</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Three-cycle termination test verifies cell voltage cutoff at 4.20V +/-0.01V">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Repeated measurements confirm consistent termination accuracy, which is the safety-critical behaviour.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-150" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-016</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="0.5C charge rate within 90min derives from safe charging constraint">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 requires safe charging; SUB-REQ-016 specifies the 0.5C rate and 90-minute limit, which together define the safe operation envelope of the charger for the given cell chemistry.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-151" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-015</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Per-cell termination voltage implements the charge safety requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 mandates per-cell monitoring with auto termination; SUB-REQ-015 specifies the exact threshold (4.20V +/-0.01V) and conditions, directly deriving from the system safety constraint.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-152" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-021</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Connector polarity inspection verifies reverse-insertion protection">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Physical inspection confirms XT30 keying geometry.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-153" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-010</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Capacity discharge test validates 400mAh minimum usable capacity">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Constant-current discharge at 2.5A measures capacity directly against threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-154" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:REQ-SEKIDSREMOTECONTROLAIRPLANE-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-013</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bench LVC test validates 200ms response at 3.3V threshold">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-016 directly tests the LVC response time against 200ms pass criterion at 3.3V/cell threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-155" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-013</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="LVC safe state at cell level implements system LVC requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 mandates ESC LVC at 3.3V/cell; SUB-REQ-013 decomposes this to the Power System, specifying that the cell voltage sensing and signalling to the ESC must respond within 200ms, the mechanism by which the system requirement is fulfilled.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-156" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-011</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="BEC powers flight electronics enabling proportional control">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires proportional control on 3 channels; SUB-REQ-011 defines the regulated power that the receiver and flight electronics require to operate, making it a direct enabler of that control function.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-157" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-010</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery capacity enables minimum 8-minute flight time">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires sustained flight; SUB-REQ-010 specifies the battery capacity that delivers this endurance, and exists because of the flight duration performance constraint.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-158" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-014</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-014</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Connector polarisation interface derives physical inspection verification">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-014 specifies XT30 connector with polarisation markings; VER-REQ-014 defines the visual and physical mating inspection.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-159" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-013</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Power delivery interface derives loaded voltage measurement verification">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="IFC-REQ-005 specifies power delivery voltage and current; VER-REQ-013 defines the loaded voltage measurement procedure.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-160" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-009</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-012</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Failsafe configuration requirement derives functional bind test verification">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-009 specifies configurable failsafe output; VER-REQ-012 defines the bind-and-power-off functional test.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-161" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-011</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Propulsion mass limit derives assembly weighing verification">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-005 specifies 45g mass limit; VER-REQ-011 defines the assembly weighing procedure that validates this.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-162" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-020</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery-based failsafe trigger derives FCE voltage monitoring interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 requires controlled descent when battery is low; IFC-REQ-020 defines the voltage monitoring interface through which the FCE detects the low-battery condition that triggers descent.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-163" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-019</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Balance charger capability derives mains power input interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 requires balance charging capability; IFC-REQ-019 defines the mains power input interface that the charger must accept to function globally.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-164" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-018</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gyro stability control loop derives IMU-to-MCU sensor bus interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-003 requires gyro-assisted stability at 250Hz control loop; IFC-REQ-018 defines the IMU-to-MCU sensor data interface at 1kHz that feeds rate data into that control loop.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-165" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-017</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Proportional pilot control derives transmitter joystick HMI interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires 3-channel proportional control; IFC-REQ-017 defines the joystick HMI that a pilot uses to generate those proportional stick position inputs.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-166" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-016</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gyro stability augmentation derives FCE vibration-damped mounting interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-003 requires gyro-assisted stability at 250Hz; IFC-REQ-016 defines the vibration-damped mounting interface that protects the gyro IMU from structural vibration that would corrupt that control loop.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-167" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-015</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Per-cell balance charging derives balance tap connector interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 requires per-cell voltage monitoring during charging; IFC-REQ-015 defines the JST-XH balance connector that provides that per-cell access to the charger.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-168" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-014</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC battery protection derives battery-to-ESC connector interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 requires ESC battery protection; IFC-REQ-014 defines the physical connector interface that determines maximum continuous current and polarisation safety.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-169" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-013</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="3-channel proportional control derives rudder servo PWM interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires 3-channel proportional control including rudder; IFC-REQ-013 defines the PWM interface for the rudder servo channel.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-170" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-012</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Sustained flight requirement derives FCE power supply interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires sustained flight; IFC-REQ-012 defines the regulated BEC power interface that keeps the FCE operational throughout the flight envelope.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-171" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-011</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Proportional elevator control derives elevator servo PWM interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires proportional elevator control; IFC-REQ-011 defines the 50Hz PWM interface that actuates the elevator servo for that control.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-172" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-010</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC thermal limit derives sustained-run temperature measurement procedure">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-006 specifies 85°C ESC thermal limit; VER-REQ-010 defines the sustained-run thermal measurement procedure that validates this limit under worst-case conditions.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-173" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-009</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Motor thrust specification derives load-cell verification procedure">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SUB-REQ-002 specifies minimum 80g thrust; VER-REQ-009 defines the bench test procedure that validates this specific performance threshold.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-174" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-003</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Airframe impact requirement derives propeller fragmentation specification">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-008 specifies airframe impact survivability; SUB-REQ-003 derives the propeller fragmentation behaviour required to prevent secondary damage during the same impact event.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-175" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-008</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Commercial material constraint derives airframe impact performance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-007 constrains airframe to commercially available EPP/EPS foam; SYS-REQ-008 defines the impact resistance this material must provide to be a valid choice.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-176" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-006</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC protection requirement derives thermal operating limit">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 requires ESC to reduce power on battery undervoltage to protect the battery; SUB-REQ-006 specifies the thermal limit that protects the ESC itself from a separate failure mode during high-load operation.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-177" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-005</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Flight performance mass budget derives propulsion subsystem mass limit">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 specifies sustained level flight performance implying a 250g total mass budget; SUB-REQ-005 allocates 45g of that budget to the propulsion subsystem.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-178" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-010</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FHSS range performance derives RF module-to-antenna impedance interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-007 specifies &lt;1% frame loss at 150m; IFC-REQ-010 defines the RF module-to-antenna impedance match that is critical to achieving adequate TX power and pattern for that range.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-179" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-009</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="ESC battery protection derives MCU-to-gate-driver control interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 requires ESC to implement battery protection cutoff logic; IFC-REQ-009 defines the ESC MCU-to-gate-driver signal interface through which that cutoff is executed.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-180" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-006</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Proportional throttle control derives FCE-to-ESC throttle PWM interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires proportional throttle control at &lt;50ms latency; IFC-REQ-006 defines the PWM interface from FCE to ESC that carries the throttle command.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-181" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-005</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Flight performance derives power-to-propulsion delivery interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires 100g thrust margin at 15 m/s; IFC-REQ-005 defines the power delivery interface that must supply adequate voltage and current to achieve that thrust.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-182" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-004</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Proportional control requirement derives TX-to-FCE signal interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires 3-channel proportional control at &lt;50ms latency; IFC-REQ-004 defines the PWM signal interface that carries those proportional channel values.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-183" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-003</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FHSS link performance requirement derives 2.4GHz spectrum interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-007 specifies FHSS link at &lt;1% frame loss at 150m; IFC-REQ-003 defines the spectral interface constraint within which that link must operate.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-184" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-002</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Flight performance requirement derives aerodynamic lift/drag interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 specifies 5-15 m/s flight and 100g thrust margin; IFC-REQ-002 defines the aerodynamic interface that must generate sufficient lift to achieve those flight parameters.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-185" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-001</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Balance charger system requirement derives USB power interface">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Wind resistance requirement derives from flight performance specification">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-013 requires controllable flight up to 15 knots wind; SYS-REQ-001 specifies the 5-15 m/s airspeed range and 100g thrust margin that give aerodynamic authority in crosswind conditions.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Safety labelling requirement derives from complete system readiness">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-012 requires age-rating and safety labelling; SYS-REQ-009 captures the complete system readiness including documentation that labelling supports.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Toy safety compliance derives propeller material safety specification">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-009 requires EN 71/ASTM F963 compliance; SYS-REQ-006 specifies the propeller fragmentation behaviour required under toy safety standard mechanical hazard tests.">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Field repairability derives airframe structural impact specification">
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          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-008 requires field-repair of crash damage; SYS-REQ-008 specifies the airframe impact behaviour that determines what constitutes repairable versus write-off damage.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Commercial material constructibility derives airframe impact specification">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-007 requires EPP/EPS foam construction; SYS-REQ-008 defines the impact resistance that EPP foam must satisfy to be a valid material choice.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
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        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
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      <SPEC-RELATION IDENTIFIER="rel-192" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-003</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Battery charge verification derives charger monitoring requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-003 requires parent to verify battery charge; SYS-REQ-005 defines per-cell balance charger monitoring as the mechanism.">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
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      <SPEC-RELATION IDENTIFIER="rel-193" LAST-CHANGE="2026-04-24T18:45:42.106Z">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Parent safety verification derives failsafe behaviour requirement">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-003 requires parent-verifiable safe operating state; SYS-REQ-004 defines the receiver failsafe as a directly observable safe state.">
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          </ATTRIBUTE-VALUE-STRING>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Parent safety verification derives battery charge monitoring requirement">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="STK-REQ-003 requires parent to verify battery charge level; SYS-REQ-005 defines the per-cell balance charger monitoring that ensures safe charge state.">
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          </ATTRIBUTE-VALUE-STRING>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Integration test validates motor response under operational range conditions">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 150m range adds RF path loss to the test scenario, proving SYS-REQ-001 motor performance at worst-case normal operating range">
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        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></SOURCE>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="End-to-end integration test proves proportional control latency">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Only full-chain integration test can prove the combined TX+RF+FCE latency budget meets SYS-REQ-002 50ms requirement">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Variable supply LVC threshold test">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-003 proves SIL 2 safe state transition for H-003 LiPo deep discharge">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="Bench test for ESC throttle response">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-001 proves SUB-REQ-001 via optical tachometer measurement">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-007 provides the system integration test — the only method that proves the full TX-RX link budget including antenna gain, path loss, and interference margin at the specified range">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER-REQ-006 proves SUB-REQ-007 via direct logic analyser timing measurement — the only accurate method for sub-20ms latency verification">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-007 sets &lt;1% frame loss at 150m for the full link; SUB-REQ-008 assigns this requirement to the transmitter RF module as the TX half of the end-to-end budget">
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="TX control latency derives from proportional control requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
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          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-002 requires 3-channel proportional control; SUB-REQ-007 quantifies the TX-side latency contribution (20ms) ensuring end-to-end 50ms budget is maintained">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-205" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-008</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-005</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Static load test for motor-propeller retention">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER proves IFC-REQ-008 motor-prop interface retention under static loads representing worst-case flight conditions">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-206" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:IFC-REQ-007</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:VER-REQ-004</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="verifies">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Integration test for ESC-motor 3-phase interface">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="VER proves IFC-REQ-007 through direct oscilloscope measurement of switching parameters and dead time">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-207" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-004</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="LVC safe state derives from system LVC requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 mandates LVC; SUB-REQ-004 adds SIL 2 deterministic timing required for H-003 safety case completeness">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-208" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-003</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Frangible propeller design requirement derives from SYS propeller safety">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-006 mandates frangible propeller; SUB-REQ-003 quantifies EN 71 energy threshold proving compliance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-209" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-002</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Motor thrust floor derives from flight performance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires sustained level flight; SUB-REQ-002 sets 80g minimum thrust enabling &lt;250g airframe flight">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-210" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-001</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Thrust performance requirement derives from flight endurance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires 5-15m/s flight capability; SUB-REQ-001 quantifies ESC throttle response enabling that performance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-211" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-004</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="LVC safe state derives from system LVC requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-010 mandates progressive LVC and hard cutoff; SUB-REQ-004 adds SIL 2 deterministic timing (100ms transition) required for safety case completeness under H-003">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-212" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-003</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Frangible propeller design requirement derives from SYS propeller safety">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-006 sets the propeller frangibility mandate; SUB-REQ-003 quantifies the EN 71 energy threshold that proves compliance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-213" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-002</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Motor thrust floor derives from flight performance">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires sustained level flight — SUB-REQ-002 sets the 80g minimum thrust floor that enables that at &lt;250g airframe mass">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-214" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SUB-REQ-001</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Thrust performance requirement derives from flight endurance requirement">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-001 requires 5-15m/s flight capability; SUB-REQ-001 quantifies ESC throttle response as the mechanism enabling that performance — insufficient response means altitude loss in gusty conditions">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-215" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-006</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Frangible propeller from kinetic energy safety">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-006 addresses the laceration aspect of the kinetic energy hazard in STK-REQ-005 — even at safe energy levels, a rigid prop can cut">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-216" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-014</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-007</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="FHSS link performance under interference">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-007 quantifies the frame loss rate and range threshold under WiFi interference that satisfies the RF coexistence mandate in STK-REQ-014">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-217" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-010</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Regulatory 250g mass constraint on flight envelope">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="The 250g ceiling in SYS-REQ-001 is directly mandated by the FAA/EASA registration exemption threshold in STK-REQ-010">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-218" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-006</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-004</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Failsafe timeout and descent rate parameters">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-004 specifies the 500ms timeout and 3 m/s descent rate that implement the controlled descent demanded by STK-REQ-006">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-219" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-005</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-001</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Mass and speed envelope from kinetic energy constraint">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="250g at 15 m/s yields 28J kinetic energy — SYS-REQ-001 constrains the flight envelope to stay within the energy budget of STK-REQ-005">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-220" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-004</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-005</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Per-cell monitoring and thermal cutoff parameters">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-005 specifies the exact voltage and temperature thresholds that implement the safe charging need in STK-REQ-004">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-221" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-003</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Gyro-assisted attitude limiting for novice pilot safety">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Without gyro limiting, a novice child induces unrecoverable attitudes on first flight — STK-REQ-002 is unachievable without stability augmentation">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-222" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-002</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-002</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="Control latency threshold for novice usability">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="50ms latency ceiling ensures the controls feel responsive to a child with no RC training">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      <SPEC-RELATION IDENTIFIER="rel-223" LAST-CHANGE="2026-04-24T18:45:42.106Z">
        <SOURCE><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:STK-REQ-001</SPEC-OBJECT-REF></SOURCE>
        <TARGET><SPEC-OBJECT-REF>uht-bot:se-kids-remote-control-airplane:SYS-REQ-009</SPEC-OBJECT-REF></TARGET>
        <VALUES>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="derives">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkType</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="10-minute setup budget derived from 25-minute total session">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkDescription</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
          <ATTRIBUTE-VALUE-STRING THE-VALUE="SYS-REQ-009 quantifies the setup portion of the total session time budget in STK-REQ-001">
            <DEFINITION><ATTRIBUTE-DEFINITION-STRING-REF>attr-linkRationale</ATTRIBUTE-DEFINITION-STRING-REF></DEFINITION>
          </ATTRIBUTE-VALUE-STRING>
        </VALUES>
        <TYPE><SPEC-RELATION-TYPE-REF>trace-link-type</SPEC-RELATION-TYPE-REF></TYPE>
      </SPEC-RELATION>
      </SPEC-RELATIONS>
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