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back (or downward) all the way. Manually close the throttle
on the carburetor completely. Tighten the set screw on the
pushrod connector. Check throttle operation with the radio
and make adjustments to the linkage as necessary for
smooth operation from fully closed to fully open. Use the
appropriate holes in the servo horn and throttle arm to
provide the correct amount of throttle movement and to
prevent the servo from binding at its end points.
❏
8. Locate the 1/16" x 17-1/2" [1.6 x 444mm] non-
threaded wire pushrod and make a 90 degree bend 1/2"
[13mm] from one end. Drill a 5/64" [2mm] hole through the
center hole in the nose gear steering arm. Insert the
straight end of the steering pushrod into the pushrod tube
(from the firewall), into the pushrod connector on the
rudder servo. Don't cut the wire or tighten the setscrew yet.
Work the bent end of the wire into the steering arm as
shown in the photo.
❏
9. Turn the radio on. Check that the rudder trim is
centered. Align the nose wheel axle with the firewall by
moving the pushrod. When the axle is parallel with the
firewall, tighten the set screw on the pushrod connector.
❏
10. Use an epoxy mixing stick (or a Popsicle stick) to
make small stand-offs to secure the ends of the throttle and
nose wheel steering pushrod tubes. Glue them in place
with epoxy or medium CA. Avoid getting any glue inside the
tubes. Note the stick holding the receiver in place in the
photo. Once the model has been properly balanced, use
two more sticks between the fuselage sides to hold the
receiver and battery securely in place.
❏
11. Drill a 1/16" [1.6mm] hole through the bottom center of
the fuselage in front of the main landing gear block. Route the
receiver antenna through this hole. Put a small pin in the rear
of the fuselage. Use a rubber band tied around the antenna
wire and loop it around the pin to secure the antenna.
Note: Do not cut or shorten the antenna wire. Leave any
excess to hang free.
FINAL ASSEMBLY
Balancing the Propeller
❏
1. Carefully balance your propellers before flying. An
unbalanced prop is the single most significant cause of
vibration. Not only may engine mounting screws vibrate out,
possibly with disastrous effect, but vibration may also
damage your radio receiver and battery. Vibration may
cause your fuel to foam, which will, in turn, cause your
engine to run lean or quit. We use a Top Flite Precision
Magnetic Prop Balancer (TOPQ5700) in the workshop
and keep a Great Planes Finger tip Balancer
(GPMQ5000) in our flight box.
❏
2. Push the spinner backplate onto the prop shaft all the
way. The center hole may be enlarged with a prop reamer or
drill if necessary. Align a prop next to the "short" pins, but not
between the "long & short" pins on the backplate. Finger
tighten the prop nut and washer. Rotate the prop shaft
counterclockwise until the engine reaches its compression
stroke. Hold the prop shaft (or rear prop washer) while
rotating the spinner backplate and propeller to the two
o'clock position. Tighten the prop nut securely. Attaching the
propeller in this position allows easier flip starting.
❏
3. Attach the spinner to the backplate using the two
M3 x 15 screws.
18
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