Install The Engine; Radio Installation; Mount The Servos - GREAT PLANES Old Timer Instruction Manual

apply a drop of thin CA in each hole to harden the threads
in the wood.
6. Trim the windshield along the cut line. Test fit the
windshield on the fuselage and trim it as necessary.
7. With the windshield temporarily in position, test fit the
wing on the fuselage. The gap between the windshield and
the wing should be approximately 1/32" to 1/16" [.8mm to
1.6mm]. If it is less, lightly sand the wing until it fits. If it is
larger, use leftover balsa to fill the gap.

Install the Engine

1. Test fit your engine to the engine tray. If necessary,
widen the mount to accommodate the engine.
2.Use a Great Planes Dead Center
or something similar to mark the location of the mounting
holes onto the engine tray. Make sure that the front of the
engine's drive washer is in front of the engine tray. If you will
be using a spinner that is recessed for the drive washer,
make sure that the back of the spinner is in front of the
engine tray.
3. Drill 1/8" [3.2mm] holes through the engine tray where
you marked the holes. Use a 4-40 x 3/4" machine screw
with a #4 washer to draw four 4-40 blind nuts into the
holes in the bottom of the engine tray. Use a few drops of
CA to permanently glue the blind nuts into position. Harden
the top of the engine tray where the engine mounting lugs
rest by applying thin CA to the area and allowing it to fully
harden before mounting the engine.
4. Set the engine in position and mark the firewall for the
throttle pushrod, inline with the throttle arm. Remove the
Hole Locator (GPMR8130)
™
engine and drill a 3/16" hole at the mark. Also, drill a 7/32"
[5.5mm] hole for the fuel line and pressure line to pass
through the firewall.
5. Temporarily mount the engine to the engine tray with
four 4-40 x 3/4" machine screws and four #4 washers.
6. Insert a leftover outer pushrod tube through the 3/16"
[4.8mm] hole in the firewall. Glue the outer pushrod tube so
that the pushrod extends 1/4" [6.4mm] out of the firewall.
7. Test fit the muffler on the engine. Most 2-strokes will
require an extension to get the muffler out past the fuse
side. You may also need to trim the fuse side to clear the
muffler.

RADIO INSTALLATION

Mount the Servos

1. Prepare the servos by installing the rubber grommets
and brass eyelets that came with them, on each servo.
2. From the 6-1/2" [165mm] white nylon inner pushrod,
cut eight 1/8" long bushings.
3. Slide four bushings evenly spaced onto both 2-56 x
36" [914.4mm] pushrods. Adjust the bushings nearest the
ends of the rods so they will not interfere with the ends of
the outer pushrod tubes and possibly become jammed
during flight. If the bushings slide onto the rods without much
resistance, use a drop of thin CA to hold them in position.
Hint: Before installing the bushings, wipe off the pushrods
with a paper towel dampened with rubbing alcohol to
remove any oil left on the rods during manufacturing.
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