I have APM2.5 with 3.01 firmware on a HK X525 quad frame with Turnigy Plush 18 amp ESC, 2212 1000KV motors and 10/4.7 props. All calibration by the book. Works well in Stab, Loiter and Auto but I still have severe wobble when the quad descends at above about 1 metre/sec.
I have read the PDF at the bottom of the 'coper manual that deals with this issue but did not quite understand it, it seems to refer to an earlier version of the firmware and because I am new to APM and multirotors I am not certain. All the PID Settings are at default - I think. Where should I be looking?
regards
Alan
Replies
No need for concern, this is standard behavior with any heli, single rotor, multi-rotor, full-scale or RC. When the heli descends into its own prop wash, there is always significantly more turbulence than in regular flight. This causes unpredictable arm drops that the motors struggle to correct. It's almost impossible to tune this out.
You can avoid it by descending at an angle like full-scale helis, or descend more slowly.