Align T-REX 450SA ARF Manual page 33

For Hitec HS-65 Servo
Use the two-sided arm with the Z-bend placed in the hole 7.5mm from center.
9.5 With the tail rotor pushrod linkage Z-bend and servo arm installed, it will be necessary for you to
adjust the position of the servo and tail boom servo mounts to provide proper alignment of the
pushrod and tail pitch slider.
First, adjust the servo and tail boom servo mounts (by rotating them around the boom) until the
pushrod is running as straight as possible through the support and to the control ball on the tail
pitch control lever.
Then, adjust the servo and tail boom servo mounts (by sliding them fore or aft on the boom) until
the tail pitch slider is centered on the tail rotor shaft. When the slider is centered, the ends of the
brass bushing should be at equal distances from the tail rotor case and tail rotor hub.
9.6 After confirming that the tail rotor pushrod and tail pitch slider are properly aligned, secure the tail
boom servo mounts to the boom by tightening the screws that close the clamp. Be careful, however,
as tightening the screws too much can cause the mounts to snap. The mounts should only be tight
enough to prevent them from moving under moderate amounts of hand pressure.
9.7 Be sure to re-install the servo arm mounting screw in each servo before proceeding.
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