Install The Aileron, Flap Servos & Pushrods - GREAT PLANES RV-4 Instruction Manual

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7. Test fit the right flap to the wing with three hinges.
Using the same procedure used for the ailerons, join the
flaps to the wing.
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8. Repeat steps 1 to 7 for the left wing panel.
Install the Aileron, Flap Servos & Pushrods
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1. Remove the aileron servo cover from the wing. Position
the aileron servo and center the output shaft over the
opening in the servo cover. Glue a 5/8" x 3/4" x 5/16" [16 x 19 x
8mm] hardwood block to the cover on each side of the servo.
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2. Install the aileron servo into the aileron servo
opening. Drill through the servo mounting holes with a 1/16"
[1.6mm] drill bit. Remove the servo from the servo opening.
Install and then remove a servo mounting screw into each of
the holes you have drilled. Apply a drop of thin CA into the
holes to harden the threads. Once the glue has hardened
install the servo into the servo opening using the hardware
included with your servo. Center the servo, and then install
a servo arm as shown.
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3. Make a mark on the servo cover centered over the
servo mounting block. Drill through the cover into the servo
mounting block with a 1/16" [1.6mm] drill bit. Install a #2 x
3/8" [9.5mm] wood screw into the hole to secure the servo
block to the cover.
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4. Install a 12" [305mm] servo extension onto the
aileron servo lead. Secure the extension to the lead with
tape, a piece of heat-shrink tubing or some other method to
keep them from coming unplugged.
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5. Taped inside the aileron servo opening is a string.
Tie the aileron servo extension to the string in the aileron
servo opening. Pull the servo lead through the wing with the
string that is taped to the root rib. Untie the string from the
leads and tape the lead to the wing root to prevent it from
falling back into the wing.
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6. Drill through the holes in the corners of the aileron
servo cover with a 1/16" [1.6mm] drill bit. Install #2 x 3/8"
[9.5mm] SMS and #2 washers in each corner of the cover.
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