I’ve been running into severe issues with my APM 2.8 board. Since I upgraded my battery from a 5S to a 6S LiPo and went from an 4 in 1 ESC to 4 single LittleBee ESCs the copter suddenly turned out as unflyable.
If I arm the copter and give it a minimum amount of throttle (RC_PWM_Input ~5%) the motors immeadiately jump to 30% - but only motors 2 and 3, motor 1 is always lower than 2, 3 and no matter how much RC throttle input I give, motor 4 always remains at arm throttle. Motors 2 and 3 further accelerate without increasing RC input, until the drone starts to shake heavily.
I calibrated each ESC (and in calibration mode, they behave normal), RC and all sensors are calibrated. Motor and RC wiring is fine.
And I know, that a “spool up” state is defined in the ardupilot copter code, but this is far from normal, it looks like a jet-engine which is about to blow up…
Thanks in advance. If I’ve missed any required informaiton, please let me know.