Great Planes Extra 300S 60 Kit - GPMA0236 - Manual (Page 34)

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5. Bend and cut the 36" throttle pushrod wire (the one
that is threaded on one end) to fit your engine installation,
using the drawing on the fuselage plan as a guide. Install a
nylon clevis and insert the pushrod through the guide tube.
Make adjustments to the bends in the wire so the pushrod
aligns with the carburetor arm on the engine. Then, temporarily
connect the clevis to the carb arm. Temporarily mount the
muffler and make sure the throttle pushrod will not interfere
with the muffler. Make adjustments to the bends in the wire
if necessary.
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6. Temporarily install the brass Screw-Lock Pushrod
Connector into the throttle servo arm, then adjust the bend
in the throttle pushrod if necessary and fit it into the
connector. When satisfied with the fit of the pushrod, mount
the servo to the servo tray with the screws provided with
your radio system.
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7. Cut 8-1/4" off one end of one of the 35" wire pushrods
(the ones that are threaded on both ends). Cut 9-3/8" off
the end of the other 35" wire rod. Set the short pieces aside
and save them for the aileron pushrods. Thread a nylon
clevis about 20 turns onto the end of the long rod. Then,
remove the backing plate from a nylon control horn and
connect the horn to the clevis in the outer hole. Make
another pushrod assembly from the other long rod with a
clevis and control horn in the same manner.
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8. Insert the elevator pushrods into the pushrod tubes.
Position the control horns on the elevators as shown in the
sketch and on the plan. Use a ballpoint pen to mark the
location of the control horn mounting holes and drill 3/32"
holes at the marks. Temporarily mount the control horns to
the elevators with the backing plates and 2-56 x 5/8" screws.
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9. With the elevator servo set in place, make sure the
servo arm is perpendicular to the pushrod and the control
surfaces are in the neutral position. Use a felt-tip pen to
mark where the longer pushrod crosses the mounting holes
in the servo arm.
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10. Disconnect the clevis from the control horn on the
wire you marked. Make a 90° bend at the mark you made.
Temporarily install a nylon Faslink on this pushrod, then cut
the wire so it slightly protrudes out of the Faslink. Hint: If
you prefer to bend and cut the pushrod outside of the
fuselage, remove the pushrod, then make the 90° bends
and cut the wire. Unscrew the clevis and reinstall the
pushrod in the guide tube from the front, then screw the
clevis back on.
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11. Fit the 1/8" die-cut ply pushrod support (part #36)
over the pushrod tubes. Glue the pushrod support to former
8 taking care to keep the pushrods straight.
Correct Incorrect
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