AAIB investigation to Velos Single Rotor, (UAS, registration n/a) 180919
ESC failure, Hangingstone Hill, Dartmoor, Devon, 18 September 2019.
Summary:
The single rotor UAS was being flown back to its landing site when it pitched up, uncommanded, and lost control. Assessment of the UAS flight data identified that an ESC fault caused one of the UAS’s motors to run down. The increased load required to maintain the aircraft in flight depleted the battery power rapidly, resulting in the loss of control. The telemetry screen, that would have alerted the pilot of the ESC failure, was not in the pilot’s field of view.
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Published 9 April 2020