Align T-REX 450SA ARF Manual page 32

9.4 With the tail servo in its neutral position, you will need to find a servo arm that, when installed on
the servo, is as close to perpendicular to the tail boom as possible. Be sure to test multiple arms and
arm positions (for example, if it is a two-sided arm, try both sides) on the servo to find an arm that
matches the intended position closest.
Please see the following photos and notes to help you select the correct servo arm for your chosen
servo, and the location in which the tail rotor pushrod linkage Z-bend should be placed. Be sure to
enlarge the mounting hole using a sharp hobby knife (if required) to provide smooth movement of
the Z-bend in the mounting hole, with no additional slop or free play. Also, be sure to remove any
unused portions of the servo arm to prevent binding:
For E-flite/Spektrum S75 Servo
Use the single-sided arm with the Z-bend placed in the mounting hole 7.0mm from the center.
For JR 3400G Servo
Use a shorter side of the four-sided arm with the Z-bend placed in the mounting hole 8.0mm from
the center.
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