Originally Posted by fjante
maybe this will help you?
Q: How to reverse the yaw gyro for a tricopter?
A: Go to the "Mixer Editor" and change the channel (number to the upper right) to 4 where the yaw servo is connected. Then change the "rudder" mix value to -100.
This one really helps ! Thank you...my Tri has been flying now. I was using the Emax servo on it and when I set it to -100 the Tri flys ....decided to use a bigger servo on it and I have to set it back to +100 again but now I know that not all servos are plug n play for a tri tail .