the pushrod into the pushrod tube, then bend it as
necessary to connect to the steering arm. Mount a screw-
lock connector to the rudder servo arm with a nylon retainer.
Temporarily fit the pushrod into the connector.
❏
9. Make a brace for the front of the tail wheel pushrod
tube from the 1/4" x 1/2" x 6" [6 x 13 x 150mm] balsa stick.
Drill a 3/16" [4.8mm] hole through the brace, then slip the
brace over the tail steering pushrod tube. Glue the brace in
the fuse so the pushrod aligns with the screw-lock connector
on the rudder servo. Glue the pushrod tube to the brace.
Center the tail wheel, then secure the pushrod to the screw-
lock connector with a 4-40 x 1/8" [3.2mm] screw.
❏
1. Mount the engine mount to the firewall with four 8-32
x 1" [25mm] SHCS, #8 lock washers and #8 flat washers,
but do not tighten the screws. Adjust the mount to fit your
engine and tighten the screws.
❏
2. Mount the back plate of the spinner to the engine.
Position the engine on the mount so the back plate will be 5-
7/8" [150mm] from the firewall. Temporarily hold the engine
to the mount with a small “C”-clamp. Use a Great Planes
Dead Center
™
Hole Locator (GPMR8130-shown in the
photo) or another method to mark the locations of the holes
for mounting the engine.
❏
3. Remove the engine mount from the firewall. Drill #29
(or 9/64" [3.6mm]) holes through the mount at the marks.
Tap 8-32 threads into the holes. Mount the engine mount to
the fuse, then mount the engine to the mount with 8-32 x 1"
[25mm] screws and #8 lock washers. Center the mount on
the vertical line on the firewall, then tighten the bolts that
hold the mount.
❏
4. Drill a 3/16" [4.8mm] hole through the firewall for the
throttle pushrod in alignment with the carburetor arm.
❏
5. Cut the 3/16" x 12" [4.8 x 300mm] pushrod tube to the
correct length, then roughen one end and guide it through
the hole you drilled. Thread a nylon clevis twenty full turns
onto the 2-56 x 18" [460mm] pushrod. Bend the front of the
pushrod as necessary, then connect the clevis on the
pushrod to the carb arm.
❏
6. Cut the other end of the pushrod to the correct length,
then bend it as necessary to connect to a screw lock
connector on the throttle servo arm. Similar to the brace
used for the tail wheel steering pushrod tube, make a brace
for the throttle pushrod tube from the piece of leftover
1/4" x 1/2" [6 x 13mm] balsa stick and glue it into position.
Mount the Engine
21
