I'm hoping someone out there can help this pilot get his wings. I just received my new 3DR Quad with APM 2.6 (soo excited!) and using a Turnigy 9x stock radio. I've got the latest version of Mission Planner and have uploaded the quad straight to v3.01.
When taking off, the motors spin up at the same time, when gently applying throttle it weebles and wobbles while still having a leg on the ground. As soon as I apply a bit more throttle, it wants to flip back. I put it in some deeper grass to see the grass blowing... when I push for a left roll, the right two motors apply more thrust and when I want to roll right, the left two motors apply thrust (which makes sense to me). However what's weird (but maybe it's normal?) is when I pitch forward the two diagonal motors apply force (the diagonal motors switch when pitching forward and back).
I've checked the power distribution board and make sure the motors are aligned right (which I had wrong the first time). I've re-calibrated the sensors and radio according to documentation and Youtube videos. I've re-calibrated the ESCs and the motors spin up simultaneously. The radio calibration page in M.P. does show the controls seemingly working ok. I've seached google and the forums and the closest I've come is http://www.diydrones.com/forum/topics/new-firmware-3-0-1-for-ardu-copter-in-x-config-flips-nose-up-upon. I might try and downgrade the firmware to 2.9 something or other to see what happens thing.
Any and all help would be most welcome! Having a new baby and a new farm only leaves me about 1/2hr daylight to work with haha
Sob story aside... my sincere hats off to all the developers/contributors to the APM/opensource community... simply amazing work!