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6. Disconnect the clevises from the control horns. Make
a 90° bend at the marks you made. Temporarily install a
nylon Faslink
™
on each pushrod and cut the wire so it
slightly protrudes out of the Faslink. Hint: If you prefer to
bend and cut the pushrods out of the fuselage, remove the
clevis, pull the pushrod out, make the 90° bends at the
marks and cut the rods. Reinstall the pushrods in the pushrod
tubes from the front and screw the clevises back on.
Note: If necessary, enlarge the holes in the servo arms with
a 5/64" [1.9mm] drill bit (or a #48 drill for precision).
Install the Aileron Pushrods
1. Remove the aileron servo hatch from one of the
wing halves. Position the servo on the hatch so that the
servo arm is centered in the hatch opening. From the 1/4" x
3/8" x 6" [6.4mm x 9.5mm x 152.4mm] basswood stick, cut
two servo mounting blocks 1/2" [12.7mm] long. Use 30-minute
epoxy to glue the servo mounting blocks to the servo hatch.
Note: Secure the servo mounting blocks by first drilling
several 1/16" [1.6mm] holes about 1/8" [3.2mm] deep into
the gluing surface of the basswood blocks. Roughen the
servo hatch where the epoxy will be applied. Pack epoxy
into the 1/16" [1.6mm] holes before clamping the blocks into
position.
2. After the epoxy has fully cured, insert a 1/32" [.8mm]
temporary shim between the servo and the plywood hatch.
Drill 1/16" [1.6mm] pilot holes and mount the servos to the
mounting blocks using the hardware that came with the
servos. Remove the shims.
3. Trim a servo arm so that only one arm remains.
Install the servo arm on the servo and reinstall the hatch in
the wing.
4. Connect a 12" [304.8mm] servo extension to the
aileron servo. Cut a small exit hole for the servo wires in the
top wing sheeting, at the center of the wing. Route the servo
wires through the wing and out the exit hole.
5. Thread a nylon clevis 14 turns onto a 2-56 x 4"
[101.6mm] wire pushrod. Attach the clevis to a small nylon
control horn. Position the control horn on the aileron control
horn mount. With the pushrod aligned with the servo horn,
mark the control horn mounting holes.
6. Drill a 1/16" [1.6mm] pilot hole at each mark. Attach
the control horn with two #2 x 3/8" [9.5mm] sheet metal
screws. Remove the screws and harden the screw holes
with a drop of thin CA. After the CA has cured, reinstall the
horn and screws.
34
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