Great Planes SU-31 3D ARF - GPMA1412 - Manual (Page 10)

10
Install the Ailerons Servos & Pushrods
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1. Installing the servos in the wing will require the use
of one 24" [610mm] servo extension for each aileron servo.
One Y-harness connector is required and is used to allow the
aileron servos to plug into one slot in your receiver. You may
have a computer radio that allows you to plug the servos into
separate slots and then mix them together through the radio
transmitter. If you choose to mix them together with the radio
rather than a Y-harness, refer to the manual included with
your particular model radio system.
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2. Attach the 24" [610mm] servo extension to the
aileron servo and secure it with a piece of the included large
heat-shrink tubing. Only 1-1/2" [38mm] of heat-shrink tubing
is required for each connector.
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3. Cut the covering 1/8" [3mm] inside the opening in
the underside of the wing for the aileron servo. Use a trim
iron to seal the covering to the inner edges of the opening.
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4. Tie the string from inside the opening for the aileron
servo to the end of the servo extension. Remove the tape
holding the other end of the string to the wing root rib and
pull the servo wire and extension through the wing.
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5. Temporarily position the aileron servo into the servo bay.
Drill a 1/16" [1.6mm] hole through the four mounting holes of the
servo, drilling through the plywood mounting plate in the wing.
Install and remove a servo mounting screw into each of the four
holes. Apply a drop of thin CA into the holes to harden the wood.
After the glue has cured, install the servo into the opening using
the hardware that came with your servo. Center the servo with
your radio system and install a servo arm as shown.
The next three images are used for steps 6 and 7
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6. The aileron has a plywood plate for mounting the control
horn. You can see the outline of it underneath the covering by