I need help figuring out what went wrong in stabilized flight:
This plane was flying relieably in Stabilize mode, but after flying straight and level at full throttle for a few seconds it suddenly pitches down and nosedives into the ground.
- The V-tail still works fine after the crash, so I assume it is not a mechanical failure.
- The controller setpoint is fine - my inputs were followed until the very last seconds of the flight
- no failsafe or warning except one where the GPS message is invalid, but the GPS should not influence stabilized flight
- The logged GPS position cuts off just before the nosedive