Great Planes Super Skybolt 60 Kit - GPMA0170 - Manual (Page 61)

NOTE: If you are going to use a spinner
that has a backplate that extends
behind the face of the thrust washer,
you will need to allow for the additional
space required.
D 9. When satisfied with the fit of the cowl, re-
mount the engine Remove the needle valve and
muffler, and stuff pieces of paper towels into the
openings to keep dust out of the engine.
D 10 The cowl must now be cut out to clear the
engine head and muffler You also need to drill holes
for the needle valve, idle adjustment and choke (if
it's a 4-cycle) This is purely a "cut a little and test fit
it" type of operation that requires patience It may
seem like an impossible task, but take your time and
cut only a little at a time and you will end up with a
nice looking cowl A Dremel Moto-Tool with a
conical pointed bit works well for this.
of the cowl, approximately 3/8" in front of the cowl
aft edge The holes should be somewhat centered
on the sides and go through the balsa fuselage
D 13. Remove the cowl, and locate the four 1/8" x
3/4" x 3/4" ply screw plates (SKY6F29) Center a
screw plate over each 1/16" hole on the inside of
the fuselage, and glue them in place.
D 14. Using the holes already in the fuselage as
guides, drill 1/16" holes through the four 1/8"
ply plates.
D 11 Once you get the cowl to fit over the engine,
place the spinner backplate on the engine The
cowl is correctly positioned when the spinner
backplate is centered in front of the cowl and there
is approximately 1/16" between the backplate and
the cowl.
D 15. Enlarge the holes in the cowl only to 3/32",
and glue a #2 washer (WSHR001) at each hole
with CA (See photo at step 16).
NOTE: This step is purely a "cut-
and-fit" step that w i l l vary on every
k i t ; therefore, we can only tell you
what worked for us. Even if you use
the same engine/mount combination,
your particular installation may vary
quite a bit.
D 12. Tape the cowl in position on the fuselage, and
drill a 1/16" hole on the top, bottom and both sides
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