GREAT PLANES Waco YMF-5 Instruction Manual page 17

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5. Install a nylon clevis and a silicone retainer on each
elevator pushrod. Be sure to screw the pushrod into the clevis
far enough so that at least 1/8" [3.2mm] of the threaded end
extends into the clevis barrel. If you removed the pushrods,
slide them back into the pushrod guide tubes. Fit the clevises
to the outer hole of the elevator horns. Slide the silicone
retainer into position.
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6. Use the last 36" [914mm] pushrod to mark the position
of the rudder control horn. Position a control horn over the
mark you made and drill two 1/2" [12.7mm] deep holes using
a 1/16" [1.6mm] drill bit. Install the control horn using two #2
x 1/2" [12.7mm] sheet metal screws.
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7. Install a nylon clevis and a silicone retainer on the
rudder pushrod. Fit the clevis to the outer hole of the rudder
horn and slide the silicone retainer into position.
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8. Use a piece of masking tape to tape each elevator
counterbalance to the stabilizer so that the elevators will
remain centered for the next few steps.
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9. Prepare one servo so that the servo arm is 90° to the
servo case. Clip off the unused arms so that your servo looks
like the one shown above. Align your servo so that the second
outermost hole (or the hole that is 1/2" [12.7mm] from the
center of the servo output shaft) is centered between the two
elevator pushrods. Install the servo in that position using a
1/16" [1.6mm] drill and the screws that came with your servo.
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10. Make an equal bend in each pushrod wire 1-1/2"
[38mm] back from the holes in the servo arm so that each
wire points straight forward. Cut the left elevator pushrod 3/4"
[19.1mm] forward of the bend. Cut the right elevator pushrod
1/2" [12.7mm] forward of the servo arm holes.
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