Mount The Engine - GREAT PLANES Ryan STA-M Instruction Manual

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.

Mount the Engine

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.
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