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Finish the Model
❏
1. Before fi tting the cowl,
make any cutouts necessary
for your power system. If you
are installing a glow engine, a
cutout must be made for the
engine head, exhaust, needle
valve access, and cool air
exit. A rotary tool such as a
Dremel works very well for
cutting holes in fi berglass. We
suggest proceeding slowly
with this step to achieve a
clean, accurate hole around
the engine head. Gradually
enlarge the hole as needed
checking your progress frequently. A paper template of the
engine head can be made. However, the cowl cheeks will
make a template more diffi cult to use.
❏
2. Put 5" [127mm] strips of masking tape on the sides of
the fuselage parallel to the fuselage length (two per side) as
shown (reference the cowl blocks glued inside the fuselage
for placement of the tape). Make a mark 1/4" [6mm] behind
the front of the fi rewall on each piece of tape. Use a ruler to
accurately draw a 4" [102mm] line from the mark onto the
tape. Make a mark at the aft end of each line.
❏
3. Fit the cowl onto the fuselage. Use the spinner backplate
(you may need to enlarge the hole in the backplate to match
the size of your motor shaft) to center the position of the front
of the cowl 1/8" [3.2mm] behind the backplate. Be sure that
the colors on the cowl and fuselage are aligned. Temporarily
tape the cowl in place or have a helper hold the cowl. Measure
4" [102mm] along the lines from the aft marks on the tape and
mark the cowl where to drill the four cowl mounting holes.
❏
4. Drill 3/32" [2.4mm] holes at the marks you made on
the cowl through the cowl and fuselage (take care not to drill
into the fuel tank). Remove the cowl and thread a #4 x 3/8"
[9.5mm] self-tapping screw into each hole in the fuselage
and back it out. Apply a couple drops of thin CA to each
hole. Enlarge the four holes in the cowl with a 1/8" [3.2mm]
bit. Install the cowl onto the fuselage using four #4 x 3/8"
[9.5mm] self-tapping screws and four #4 fl at washers.
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