I did a test run on my quad today (18" Prop, all carbon fibre, 3S, Pixhawk, FW3.3.3, autotuned on all axes), pushing it really hard with fast flights to see where the limits are.
Several times during the flight, when coming out of a fast forward or sideways move at max speed it started to oscilate for a moment, then caught itself and all was fine. I think this is a known behaviour that can be fixed with an increase of MOT_THR_MIX_MAX to 0.9 (which I did). However, at the last attempt it started to oscilate so badly it did not recover and crashed badly
I am not too worried about the damage, just parts, but I would like to understand what caused the behaviour so I can tune it out/prevent it from happening again.
I spent 2h today looking at the log files etc. and to me it looks as if for some strange reason the overall throttle output is abruptly reducing, especially on RC2, causing the loss of attitude control.
Do you have any idea what could be causing this?
Thanks so much,
FID109 - 2017-05-20 12-11-18.bin (3.1 MB)