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WING CONSTRUCTION
1.
Prepare the wing sheeting and spars.
Cut 4 spars from the
1/8"x3/16"x24" (3.2x4.8x610mm) spruce
23-1/8" (587.4mm) long.
Cut 4 spar doublers 7" (177.8mm) long
from the 36" (914 mm) long piece of the
same material.
Glue a doubler to the top of each spar
at one end then taper the last
2" (50.8mm) of the opposite end on the
bottom as shown.
2.
Cut the four trailing edge sheets from
the 1/16"x2" (1.5x50.8 mm) sheets 24"
long. Save the 12" (304.8mm) cut-offs
from the ends of these sheets for the
center sheeting.
Taper these from 2" (50.8mm) wide at
the root to 1-1/2" (38.1mm) wide at the
tip.
Taper the back edge of the sheet down
to about 1/64" (.4mm) over about
3/8" (9.5 mm). Make 2 top and 2 bottom
sheets.
3.
Cut the two leading edge sheets from
the 1/16"x3" (1.5x76.2mm) sheets
24" (609.6mm) long. Save the
12" (305mm) cut-offs from the ends for
the center sheeting. Taper these from
3" (76.2mm) wide at the root to 1-
3/4" (44.5mm) wide at the tip. Cut two
holes in each for the motor power wires
1" (25.4mm) forward of the spar and
1/2" (12.7mm) and 5" (127mm) from the
root. You can make a neat circle cutter
with a piece of 1/2" (12.7mm) brass
tube sharpened at the end.
4.
Cover the plan over the right wing panel with wax paper and pin the leading and
trailing edge sheets down to the plan in their proper place. Glue the W-12 piece
between them at the tip where shown. Place a 1/8" (3.2mm) shim under W-12
and the tip sheeting. Glue the bottom spar to the rear edge of the leading edge
sheet and pin down just outside of W-9. Make sure the doublers are towards the
center of the wing.
5.
Place ribs W-2 through W-9 down on the spar making sure the ribs are vertical to
the sheeting. The W-1 rib is set with the top angled towards the tip slightly using
the dihedral gage to set the angle. Glue the ribs only to the trailing edge sheeting
and the spar for now.
6.
Fit and glue the top spar in place. Do not glue the spars together at the tip at this
time. Fit and glue the W-14 aileron spar to the trailing edge sheeting between W-
5 and W-9 and to the rear of ribs W6, 7, 8, and add the 1/8"x1/4" (3.2x6.4mm)
trailing edge doublers between ribs W-5 and W-6, next to W-7, and next to W-9.