Install The Elevator Pushrod - GREAT PLANES Extra 300S Instruction Manual

7. Mount the control horn to the aileron with two 2-56
x 5/8" screws and the nylon backing plate that was
attached to the control horn. Slide a silicone retainer onto
each clevis.
8. Use a felt-tip pen to mark the pushrod wire where
it crosses the holes in the aileron servo arm.
Servo Horn
9. Bend the pushrod at the mark you made. Cut the
excess wire as shown in the sketch and connect the
pushrod to the servo arm with a nylon Faslink.
10. Return to step 4 and connect the other aileron servo
to the other aileron the same way.
11. Turn the wing over. Use a piece of bent wire to fish the
string out of the 1/2" holes in the center section of the wing
and retrieve your aileron servo cords. Connect both aileron
servo cords to a "Y" harness.
FasLink
2-56 (.074") Pushrod Wire

Install the Elevator Pushrod

1. Cut one of the pushrod dowels to a length of 19".
Drill two 5/64" (or 3/32") holes in one end of the pushrod as
shown in the sketch. This is the aft end of the pushrod
dowel.
2. Drill another 5/64" hole 1" from the other end (front) of
the pushrod dowel.
3. (See the Pushrod Template #1, on page 4 for this
step.) Cut 1/2" from the threaded end of two .074" x 12"
wire pushrods. Make the elevator pushrod wires as
shown in the sketch from the two rods. Note that the sketch
shows two rods, one 1/4" shorter than the other. Save the
leftover pushrod wire to be used at the front of the
pushrods. You should have two scrap pieces of wire,
approximately 6" long.
4. Use a hobby knife to cut grooves in the aft end of the
pushrod dowel to accommodate the elevator pushrod
wires. Test fit the pushrod wires and adjust the grooves as
necessary for a good fit. Hint: Once you get the groove
started, use the threaded end of another pushrod as a file
to make the groove just the right size.
5. Cut a groove in the front end of the pushrod dowel
using the same procedure as in step 4.
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