Build The Wing; Build The Wing Panels - GREAT PLANES Profile 38 Instruction Manual

5. From the 1/4" x 1/4" x 30" [6mm x 6mm x 762mm]
and 1/8" x 1/4" x 24" [3mm x 6mm x 610mm] balsa sticks,
cut and glue ribs to the leading and trailing edges.
6. Remove the rudder from your building board. Inspect
all the glue joints and add CA to any joints that don't look
strong. Fill any gaps with balsa sanding dust and a drop or
two of thin CA. Use a bar sander to sand both sides of the
rudder flat and even.
7. Return to step 2 and build the second rudder.

BUILD THE WING

Build the Wing Panels

Start by building the left wing panel upside-down over the
left wing panel plan so your progress matches the photos.
1. Match the four 1/8" x 1/4" x 24" [3mm x 6mm x 610mm]
basswood main spars so any warps will counteract each other.
2. Cover the wing panel plan with waxed paper or Great
Planes Plan Protector.
3. Glue two of the die-cut 3-ply W-3 ribs together.
4. Glue the die-cut 3/32" [2mm] balsa W-3B ribs to
both sides of the aft end of the W-3 rib.
5. Position one of the main spars over the plan. Align
the end of the main spar with the outboard edge of rib W-7.
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