Great Planes Yak-54 1.60 ARF - GPMA1411 - Manual (Page 9)

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1. Installing the servos in the wing will require the use
of one 24" [610 mm] 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 with your particular model radio system.
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2. Attach the 24" [610 mm] servo extension to the
aileron servo and secure it with a piece of the included large
heat-shrink tubing. Only 1-1/2" [38 mm] of heat-shrink tubing
is required for each connector.
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3. 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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4. Temporarily position the aileron servo into the servo
bay. Drill a 1/16" [1.6 mm] 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 5 and 6.
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5.The aileron has a plywood plate for mounting the control
horn. You can see the outline of it underneath the covering by
looking at the aileron at a shallow angle. If you cannot see it, the
plate is approximately 1-5/8" [41 mm] wide and will be centered
with the servo arm. Use a T-pin to lightly puncture the covering
to be sure you are over the plywood plate.
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6. Place a heavy-duty nylon control horn on the aileron,
positioning it over the hinge line as shown in the sketch and
aligning it with the servo arm. Mark the location for the screw
holes. Drill through the marks you made with a 3/32" [2.4 mm]
drill bit. (Be sure you are drilling into the plywood plate mounted
in the bottom of the aileron.) Drill through the plate only. Do not
Install the Aileron Servos & Pushrods
9