GREAT PLANES Old Timer, Instruction Manual

Page: 35 / 46

nylon FasLink
™
on each pushrod and cut the wire so it
slightly protrudes out of the FasLink.
Note: If necessary, enlarge the holes in the servo arms with
a 5/64" [1.9mm] drill bit (or a #48 drill for precision).
❏
1. From the 6-1/2" [165mm] white nylon inner pushrod,
cut three 1/8" long bushings.
❏
2. Slide the three bushings onto the 2-56 x 17-1/2"
[444.5mm] throttle pushrod as shown. 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.
❏
3. Thread a nylon clevis approximately 14 turns onto one
end of the pushrod.
❏
4. Cut the throttle outer pushrod approximately 3"
[76.2mm] from the throttle servo arm.
❏
5. Insert the throttle pushrod into the throttle outer
pushrod from the engine compartment. Connect the clevis
to the throttle arm.
❏
6. Remove the throttle servo arm from the throttle servo
and install the brass screw-lock pushrod connector on the
throttle servo arm and secure it with a nylon retainer.
❏
7. Slide the screw-lock pushrod connector onto the
throttle pushrod. Install the throttle servo arm on the throttle
servo. Install the 4-40 x 1/8" [3.2mm] socket head cap screw
in the screw-lock pushrod connector and adjust the throttle.
SPECIAL NOTE: Do not confuse this procedure with
“checking the C.G.” or “balancing the airplane fore and
aft.” That very important step will be covered later in
the manual.
Now that you have the basic airframe nearly completed, this
is a good time to balance the airplane laterally (side-to-
side). Here is how to do it.
❏
1. Temporarily attach the wing to the fuselage.
❏
2. With the wing level, have an assistant help you lift the
model by the engine propeller shaft and the bottom of the
fuse under the TE of the fin. Do this several times.
❏
3. If one wing tip always drops when you lift the model, it
means that side is heavy. Balance the airplane by adding
weight to the other wing tip. An airplane that has been
laterally balanced will track better in loops and other
maneuvers.
BALANCE THE AIRPLANE LATERALLY
Install the Throttle Pushrod
35