I just had a very strange behavior with ArduPilot 4.1-beta2 (self compiled) using EKF2 on my 5" Quadcopter. I flew the whole day and everything looked fine, but during the last two flights, in Poshold, quickly after arming and starting, it went all over the place and I already thought I lost it in a tree.
In the logs you can see, shortly after starting, it suddently went from a stable flight in Poshold to full power and flew up into the air. I tried to figure out what’s wrong from the logs, unfortunately, I don’t understand it.
Purple line: throttle, other lines: Servo 1-4
Can anybody tell me what’s wrong? Is there a sensor broken?I didn’t change the configuration between the good flights and the ones where it went crazy. I use a Matek H743 for FC and Matek M9N-CAN for GPS.
I’m thankful for any help as I have no idea