Great Planes Cirrus SR22 .46-55 ARF - GPMA1363 - Manual (Page 22)

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7. Insert the landing light wires through the hole in the
front of the fuselage. Position the cowl on the fuselage.
Install the spinner backplate on the prop shaft. Position the
cowl so that it is centered on the spinner backplate. Tape the
cowl in position.
Electric Only: With the RimFire .55 or O.S. .50 motor, the
center of the spinner backplate will need to be enlarged to
5/16" [8mm].
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8. Drill a 1/16" [1.6mm] pilot hole through the cowl and
cowl blocks. Remove the cowl and enlarge the holes in the
cowl with a 3/32" [2.4mm] drill bit.
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9. As you install the cowl, route the fi ll line out the bottom
of the cowl and install the fuel line plug (glow powered only).
Attach the cowl to the fuselage with four #2 x 3/8" 9.5mm]
sheet metal screws and #2 fl at washers. Be sure to harden
the screw holes with thin CA.
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10. Install a suitable propeller for the power system
being used. Secure it with the prop washer (included with
the engine) and the appropriate spinner adapter. Carefully
balance the propeller and any spare propellers before
installation. An unbalanced propeller can be the single most
signifi cant cause of vibration that can damage the model.
Not only will engine mounting bolts loosen, possibly with
disastrous effect, but vibration may also damage the receiver
and receiver batteries. Vibration can also cause the fuel to
foam, which will, in turn, cause the engine to run hot and quit.
We use a Top Flite Precision Magnetic Prop Balancer
(TOPQ5700) in the workshop and keep a Great Planes
Fingertip Prop Balancer (GPMQ5000) in our fl ight box.
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11. Install the spinner nose cone and secure it with 4 x
45mm socket head cap screw.