Great Planes Cosmic Wind Minnow 60 ARF - GPMA1321 - Manual (Page 15)

The following engine mounting instructions apply to both the
two-stroke and four-stroke engines. As mentioned earlier in
the instructions, the four-stroke engine leaves much more of
the cowl intact than will the two-stroke. Should you have to
cut a portion of the fuselage/ firewall to clear your muffler,
you may need to insert an additional hardwood block (not
included) inside the fuselage for mounting the cowl. You may
also wish to build a box inside of the fuselage to prevent fuel
residue from getting inside the fuselage.
❏
5. Position the engine on the mount so the distance from
the front of the firewall to the front of the thrust washer
measures 5-1/2" [140mm]. Mark the location of the engine
on the mount. The Great Planes
® Dead Center Hole Locator
(GPMR8130) works well for this. Drill through the marks you
have made on the engine mount with a #29 or 9/64" [3.6mm]
drill bit. Tap each of the holes with an 8-32 tap.
❏
6. Install the engine onto the mount with four each,
8-32 x 1" [25mm] socket head cap screws, #8 flat washers
and # 8 lock washers.
❏
7. Mark the location on the firewall where the throttle
pushrod will pass through. Drill a 3/16" hole on that mark.
Locate the 24" [610mm] gray plastic pushrod tube. Cut it to
a length of 20" [508mm]. Roughen one end of the tube with
220-grit sandpaper. Install the un-sanded end of the
pushrod tube into the front of the firewall through the hole
you drilled in the firewall and through the hole inside the
fuselage, in the fuselage former. Apply CA to the roughened
end of the plastic tube gluing it into the firewall.
❏
8. Locate a .074 x 36" [914mm] pushrod wire. Cut it to a
length of 24" [610mm] cutting off the threaded end of the
wire. Insert this wire into the plastic tube you installed for the
throttle. Install a brass screw-lock connector into the throttle
arm, locking it to the arm with the nylon retainer. Insert this
wire into the screw lock connector and the plastic tube you
installed for the throttle. Lock the wire to the connector with
a 4-40 x 1/4" [6mm] socket head cap screw.
❏
9. Install the throttle servo into the tray in the fuselage.
Drill a 1/16" [1.6mm] hole through each of the mounting
holes in the servo. Install and then remove a servo mounting
screw into each of the holes you have drilled. Apply a couple
of drops of thin CA into the holes to harden the threads. After
the glue has hardened install your servo.
❏
10. Install a brass-screw lock connector and nylon
retainer to the servo arm. Slide it onto the pushrod wire,
center the servo, install the servo arm onto the servo then
install the servo screw into the servo and a 4-40 x 1/4"
[6mm] socket head cap screw into the screw-lock connector.
15