If I understand it correctly, Aruplane only has stall prevention systems and no active stall recovery systems.
So what happened here?
I was gathering data in auto mission and logging airspeed vs watts. I reduced airspeed (by mavlink telemetry) and got to 11m/s. The air got a little turbulent and a wing stalled and entered a half spin.
It almost looks like arduplane first tried to keep the nose up with elevator and then detected a stall and put down elevator. If that’s not the case, why did it reverse the elevator (blue line)? Perhaps the TEC system. There seems to be a lot going on with TEC2 at that point.
file ‘stall at 1638’
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I just found this interesting post while diving into the TECS tuning topic. The answer is given in one of the dev talks. Basically Speed Control loop wins over Altitude Control loop and that’s why it drops the nose down. Must be a forgiving frame to recover from that 40m drop.
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