Great Planes Super Chipmunk ARF - GPMA1303 - Manual (Page 17)

2-1/2" [64mm] piece of masking tape over the dimple and to
the side of the fuselage as shown. Do this on both sides of
the fuselage. Using a fine-tip felt pen, mark the dimple and
draw a line back from the dimple 2" [51mm].
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4. Install the cowl to the fuselage. Insert the cowl ring
onto the engine and the front of the cowl. Note: The cowl
ring is a useful tool for centering the engine to the opening
in the front of the cowl. It has been made to fit the O.S.
®
1.20. If you are using another engine it may or may not fit.
You may choose to make a ring to fit your engine or you can
center the engine without using the ring.
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5. Place the propeller onto the engine. Position the cowl
so that there is 1/8" [3mm] clearance between the cowl and
the propeller. Note: If you are planning to use some form of
a spinner, be sure you fit the cowl to the spinner backplate
instead of the propeller.
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6. With the cowl aligned to the fuselage sides, measure
forward 2" [51mm] from the reference mark you made on
the masking tape. Drill a 1/16" [1.6mm] hole though the cowl
and fuselage. Temporarily install a #2 x 1/2" [13mm] screw
into the cowl to hold it in position on the fuselage. Repeat
this step for the other side of the cowl.
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7. Drill a 1/16" [1.6mm] hole through the bottom cowl and
the fuselage as shown. Do this on both sides of the cowl.
Install a #2 x 1/2" [13mm] screw into the cowl and fuselage.
The screw exits out of the fuselage into the lower opening in
the fuselage.
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8. Back the screw out until it is no longer visible in the
opening of the fuselage. Glue a 1/8" x 1" x 1" [3 x 25 x 25mm]
plywood plate over the hole. After the glue has hardened
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