Hi-
I am doing tech support for a university group. Although I recently repaired their copters and ran successful test flights, the university group is running into toilet bowling when they try to fly.
I have attached log files. In both cases the copter seems to fly perfectly straight for the first few tracks of the mission, and then starts toilet bowling violently enough (pitch/roll past 45 degrees) that they put it in loiter (still toilet bowling) and cut the mission short.
I have not run into this before- usually if the compass settings are bad I can tell right off the bat, but this problem doesn’t seem to start until well into the duration of the flight. Any assistance would be greatly appreciated.