Hi I have an APM 2.6, DJI Flame Wheel F550, with the same motors, 920kv’s, and ESC’s, DJI 30A Opto’s, that came with it. Now having problem with the throttle. I just recently picked up the 2.6 and have not flown it yet, not for long anyway, a few seconds.
When I arm the motors, I don't get any pre arm check errors, it arms as usual. I wait for the gps lock, then start to increase the throttle all is good so far I take off and only seconds later the motors start to slow down and the copter hits the ground and at this point I don't have any control with the TX, Spektrum DX7, if I unplug the LiPo and plug it back in, I can do it again same thing. I check everything nothing is hot or even warm. In the setup I do everything except the ESC calibrating. I read somewhere that the dji opto's don't support or use calibrating. When I do the compassmot stuff the throttle seems to work fine during that procedure. Please help!