The original question was about the erratic behaviour after repair. However, here my thoughts about the crash flight:
Would you take a look at the telemetry when low voltage 2 is triggered and the AC starts climbing. The Remote shows Ch0 throttle being in throttle down position but the aircraft continues to climb. Curious what your take is on that.
- The unexpected climbing starts at the same time as the compass calibration errors starts to appear. But may be a coincidence. I prefer your theorie that the aircraft raises RTH due to low battery.
- I do not believe that the battery was changed for the second (short) flight in the 00042 flight log. The voltage fell down fast to the previous value. For this flight battery problems are not unusual.
- I'm pretty sure that Motor error (Motor 5) and Emergency flight mode occur after the aircraft hits the the ground.
- If there was a lost prop, this may happen at 16:18:25 when the voltage drops. Reason is more power needed after this incident and the battery was already low before. Then all comes together, compass error, RTH, extremly low batt and the aircrafts decline with ~7m/s wich is pretty fast (should be limited to 3m/s). No more power to work against that available.
- I saw in many other flight logs that during extremly low battery often many Compass Calibration Flags are set. Maybe this is caused by under-voltage. Same here in this case.
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Now to the behaviour after repair. I think the first test flight is number 00045.
- A lot of compass errors at this place. This may result in erratic flight behaviour but there is not much visible in roll/pitch/yaw according that.
- Roll is at -3% all the time. This leads to a mild side drift which is seen in roll.
- Altidude follows throttle stick, All other sticks have no significant movements.
- Flight duration is less than 1min but voltage goes down to ~60%. I don't like this battery.
- GPS is good.
- Altitude measurement is strange (hpefully it will be better when acc cali was done).
What I would do now in this case before fiddle around with the HW:
- Clean and calibrate stick potis at ST16. Check if all at zero value in middle position.
- Repeat a proper compass calibration. Start it with aircraft directed to north.
- Connect the aircraft to the GUI and make a accelerometer calibration. This is easy.
- Check in GUI if the icon points to north whet the aircraft is directed to north. If not (more than 20° difference), there is still a compass problem.
- Do another test with speed slider on rabbit (fast) without camera.
- If OK do tests with camera.
- Grab flightlog from this tests, remember when it was so that you/we can assign the tests to the log files.
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