Sorry for double posting this is also in the ardupilot 3.5 section but I was recommended to try here also.
Vehicle: octo running arducopter latest build 3.5.3. frame 910mm 6kg without payload. I’ve just swapped over to a Pixhawk 2 FC and i’ve noticed a strange behavior with Yaw before and after tuning and auto tuning. The copter keeps spinning after yaw command by about 80% of the initial, so say if I input yaw till the copter completes a full 360 degrees stop input, the copter won’t stop yawing until another 270 degrees. i’ve adjusted PID’s and ran several autotunes but no real change. incresing the I value to 1/10th of P and beyond yealds no discernible change. I’ve attached a snapshot of my current PID’s above.