This is my first post so please bear with me. I have searched and browsed this forum but I cannot find what I need.
I have a HK450 (T-rex 450 clone) that I have converted to a flybarless setup. Also I have installed APM 2.5 with Arducopter 3.1. I have followed the manual and guides on the internet. Now I am ready for the PID tuning of the Arducopter.
When I spool up the helicopter main motor all is well. At the moment of lift off i notice that the swash plate tilt to the left and the helicopter wants to flip over. I then reduce engine thrust because else the helicopter would destroy it self. The swash is level at mid stick. It seems the swash plate becomes unlevel when engine thrust is near maximum. So it seems the swash plate is level at mid stick but at > 80% stick is not level anymore. I have no idea what is causing this and it prohibits me to tune the PID. I am so close to being able to fly this bird (finally).
Please hand me any advice you can. By the way the throttle curve and pitch curves in the TX are set like you would with a helicopter without APM.
Hope to hear. Regards.