Align T-REX 450SA ARF Manual page 41

12.3 To test tail control, it is usually helpful to set the gyro to Standard Rate Mode (non-heading/tail lock
mode). If you are unsure of whether your gyro is in the standard rate mode, or if it does not offer
a feature that allows it to be used in a standard rate mode, you can disconnect the gyro from the
receiver and plug the tail servo directly into the rudder channel on your receiver.
Then, position the helicopter to view the tail pitch slider from above, with the tail boom pointed
toward you. Move the left-hand stick left and right to check rudder yaw control. When the stick is
pushed to the left, the tail pitch slider should move to the right, toward the tail rotor hub.
With the stick pushed to the right, the tail pitch slider should move to the left, toward the tail case.
If you find that the tail servo is responding opposite to rudder control inputs, simply reverse the
rudder channel in your transmitter.
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