Hi @thisistins, I have similar issue. I'm using Pixhawk on tricopter and when I arm and try to fly, the drone simply rotates in the clockwise direction. I don't know why. I've searched online and it says to reverse the servo channel which I have done via the RC4_REV parameter.
I also noticed that if I take the props off, then arm and put the throttle up a bit; when I push the yaw stick to the left, the servo tilts right (as expected looking from the back of the drone), and when I release the yaw stick, the servo still stays at the right position. Similar thing happens if I push the yaw stick to the right, the servo tilts left and stays there. Please any help or suggestions will be appreciated.