GREAT PLANES Super Skybolt Instruction Manual page 8

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4. Cut three arms from a four-arm servo horn and
install it onto the servo 90 degrees to the servo case.
Enlarge the outer hole of the servo horn using a 5/64"
[2 mm] drill bit.
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5. Position the servo onto the underside of the servo
hatch so that the servo horn is centered in the cutout and
the servo is square to the hatch. Place a servo mounting
block onto each side of the servo up against the mounting
tabs and mark their locations on the hatch.
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6. Mix up a small batch of epoxy to glue the servo
mounting blocks to the servo hatch using the marks you
made as a guide. Allow the epoxy to cure undisturbed.
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7. Drill 1/16" [1.6 mm] holes for the servo mounting
screws. Thread a mounting screw into each hole and back it
out. Add a couple drops of thin CA to each hole to harden
the wood. Secure the servo to the hatch using the hardware
that came with the servo.
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8. Attach a 9" [229 mm] servo extension to the aileron
servo and secure it with a piece of heat-shrink tubing or
tape. 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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9. Put the servo hatch into position and drill 1/16" [1.6 mm]
holes at each corner of the hatch. Be sure you are drilling
through the plywood servo hatch frame in the wing. Thread
a #2 x 3/8" [9.5 mm] SMS screw into each hole and back it
out. Add a couple drops of thin CA glue to each hole. Secure
the hatch with four #2 x 3/8" [9.5 mm] SMS screws. If the
servo hatch does not fit completely flush with the wing
sheeting, you may need to lightly sand down the servo
mounting blocks.
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