Waco YMF-5D .91-1.20 ARF Manual

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3. Fit a screw-lock pushrod connector to the outermost

hole on short servo arm. Choose the arm that is 90° to the

servo case at 1/2 throttle. Clip off the unused servo arms.

Use a nylon retainer to secure the pushrod connector to the

servo arm. Place a drop of thread locking compound on the

screw threads and fit a 4-40 x 1/8" [3.2mm] SHCS. Fit the

servo arm onto the servo. Install the throttle servo in the

servo tray so that the end of the servo arm is in line with the

pushrod tube.

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4. Position the pushrod tube about 4" [102mm] from the

servo. Cut the pushrod tube 3/8" [9.5mm] forward of the

firewall. Fit the wooden pushrod tube standoff inside the

fuselage at the former that lines up with the leading edge of

the lower wing. Mark the position of the standoff with a felt

tipped pen. Remove the pushrod tube and sand the outside

of the tube at the place that you marked and at the firewall

end of the tube.

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Glue the pushrod tube in place at the firewall using epoxy.

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6. Thread a nylon clevis onto a 36" [914mm] pushrod and

fit a silicone retainer. Insert the pushrod into the pushrod

guide tube. Slide the pushrod into the screw lock pushrod

connector. Connect the clevis to the throttle arm. Secure the

clevis with a silicone retainer. Do not tighten the screw lock

pushrod connector yet.

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7. Turn on your radio and check to see that the servo

moves in the proper direction. With the throttle servo and

the throttle set to full, tighten the screw on the screw lock

pushrod connector. Cut off any excess pushrod and test the

operation of the throttle. Glue the wooden standoff to the

former as shown so that the pushrod tube is supported.

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8. Install the servo arm retaining screw. Use this

opportunity to set up a throttle cutoff and a flight timer on

your transmitter.