After hours of smooth flying with my APM 2.5 I started trusting in it when suddenly I observed this strange behavior of my tricopter. It was flying in circle mode, then did two loops and lost approx. 20m height while doing that. Here is the video:
loop drop (the copter loops at 10".)
That's no acro, it was in an assisted mode (circle) where loops were not possible. Also I did not flick a switch or touched a stick.
Luckily the copter was high enough for that stunt ;-))
I've attached the shortened log file. The drop occured between 13:23:41 and 13:23:47 (GPS time) and the log is from 13:23 to 13:24, with the parameters at the beginning of the file.
FW was 3.1.2 at that date.
Can anybody help me please to regain the trust in my APM? Would want to do aerial photography with it again...