I could use some help to analyze my flight log.
As a new Ardupilot user, my first and maiden flight using auto launch was a success (yes I know I shouldn’t have use auto for the maiden but it’s a heavy plane). But the second flight resulted in a crash as the plane dived down right after completing the takeoff mission and initiating a RTL.
Looking at the log it seems I made a mistake uploading the mission as it had two takeoffs commands, one for a 15 m and a second one for 50 m takeoff. However they seem to have been executed properly as the dive happen right after it switched to RTL.
So my suspicion points toward a faulty airspeed sensor: before takeoff it was logging a 60m/s arspd which is nonesense. I remember pressing the Preflight_calibration command before takeoff (while covering the pitot tube) and it changed to around 0, but it stayed around 0 during the flight as well.
Could it have forced the autopilot to try to dive down to get some airspeed? Since throttle value remained at 100% even after takeoff complete message it makes me think that could be the case.
Airspeed sensor worked fine the previous flight and I didn’t do an auto calibration nor a manual one.
Ardupilot version 4.0.8
Matek F765 Wing
Analog Airspeed Sensor Matek ASPD-7002
Plane: MFD Crosswind Mini
Thank you for your help!