I am haveing a wierd problem that I have not seen in the troublshooting.
I am new to this. I set up everything and all seem right. I launch the plane in manual and fly a bit. I then try Stable mode. At first it seems good but then all of a sudden it goes full right and then pitch down with full power. I take over in manual and take it back. The next flight it went better after some changes to the gains. so I tried FBW B and for about 3-4 mins it went really well, but then it does it again. Then I can not get it in stable mode or FBW B again.
I have 2.2.8 ardupilot installed and GCS MP 1.1.30 to upload data. I don't have telemetry yet but will have it up and running next week.
Any help or insight in the direction I shoud go to correct would be greatly appreciated.