GREAT PLANES Ultra Sport 40 Plus, Instruction Manual

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1. Locate the two cowl halves. Cut the two cowl halves
at the cut marks with Hobbico’s Curved-Tip Canopy scissors
(HCAR0667).
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2. Glue the two halves together with medium CA. Work on
one side first, applying glue to a small section at a time,
working your way around the cowl. Do not use CA accelerator
as it will make the ABS brittle and susceptible to cracks.
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3. Fit the cowl to the fuselage and to the engine you are
going to use. Make the clearance opening you need for the
engine cylinder. Note: This clearance opening needs to be
as small as possible. Its exact shape and size can be
adjusted later, when the cowl position has been fixed with
the cowl screws.
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4. Position the spinner backplate against the engine’s
drive washer. Position the cowl so that it is 3/32" [2.4mm]
behind the spinner backplate. Draw a line parallel to the
cowl edge 1/4" [6.4mm] away from it. Make a mark 3/4"
[19mm] up from the bottom of the cowl up on this line. Make
another mark 2-1/2" [63.5mm] higher than the first one. Do
this on both sides of the cowl.
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5. Hold the cowl in place with tape. Make sure it does not
move. Drill a 1/16" [1.6mm] hole at the marks into the
fuselage sides. Remove the cowl and wick thin CA into the
holes in the fuse.
❏
6. Remember that you need clearance holes for the
carburetor needle valve and glow plug. To do that, mark the
location of the holes you need to drill with paper strips
attached to the airplane and then install the cowl in place
and mark the holes on the cowl. Use a high speed rotary
tool to drill the holes.
ASSEMBLE THE COWL
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