Great Planes Ultimate 3D E-Performance ARF - GPMA1546 - Manual (Page 13)

13
Install the Tail Servos & Pushrods
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1. Trim the covering from the elevator and rudder servo bays.
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2. Connect a 16" [406mm] servo extension to the rudder
and elevator servos. Feed the servo extensions into the servo
bays and through the length of the fuselage. To improve the
adhesion of the servos to the servo bays, trim away the
covering just beneath the servo mounting tabs. Glue the
servos into the servo bays with the splines facing forward.
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3. With the elevator servo centered, attach a double-sided
servo arm vertically. Determine which way the arm fi ts best.
Cut the unused side from the servo arm, leaving the bottom
side as shown. As you did with the ailerons, loosely thread a
2x4mm self-tapping screw into an adjustable clevis and slide
it on a 2x135mm carbon pushrod. Attach the clevis to the
outer hole of the elevator servo arm.
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4. Using the pushrod as a guide for the location of the
control horn, cut a slot in the left elevator half for the horn.
Install the control horn onto the underside of the left elevator
half and glue it into place (do not cut the control horn tab
shorter before installation). Clip a control horn backplate onto
the control horn tab and glue it into place. The control horn tab
extending beyond the backplate can now be cut off. Connect
the pushrod to the control horn with another adjustable clevis.
Center the elevator, carefully tighten the screws into the
adjustable clevises onto the pushrod, and cut off the excess
pushrod beyond the clevises. Be sure to secure the servo arm
to the servo with the arm screw.