Finish The Top Of The Wing - GREAT PLANES Giles G-202 Instruction Manual

Finish the Top of the Wing

1. Turn the wing right-side up on the building board.
(Notice the dihedral built into the wing, which is flat on top.)
Using a hobby knife, carefully cut the support jigs away
from each wing half. Be careful and take your time, trying
not to break the jig and keeping the cuts straight, even if
you have to cut through some small drops of dried glue
along the way. You will use these jigs for sheeting the top of
the wing, so do not break or discard them.
2. Cut the 5/8" x 5/8" x 6" balsa stick in half, making two
filler blocks. Position each filler block against R-2 and the
aileron web as shown in the photo. Carve and sand each
block to the shape of the rib airfoil. Glue them in place with
medium CA.
3. From a 1/4" x 1/4" x 12" balsa stick, cut eight 1-1/2"
long pieces. Center and glue them to the front of the TE
web at the eight hinge locations.
4. Remove the wing from the building board. Lay out
the right wing panel plan. Pin the jig (cut from the wing in
step 1) on the plans over the aileron web, being sure the
T-pins are at a shallow enough angle so that the pins will
not touch the sheeting when you lay the wing on the jig.
Note: Place the jig so that the narrow end of the jig is at
the tip of the wing plan.
5. Place the wing with the left wing panel right-side
up on top of the wing jig which is pinned to the right wing
plan. Pin the left bottom spar to the plans. You are now
ready to sheet the top of the wing as you did the bottom.
6. Align the 1/16" x 1/2" x 30" TE sheeting with the back
of the TE web, and the centerline of the wing. Glue it in place.
7. Select a piece of 1/16" x 2-3/4" x 24" balsa aileron
sheeting, and carefully true one edge of the sheeting.
Measure 2-3/8" in from the cut you just made and cut off
the excess sheeting, making a trued 1/16" x 2-3/8" x 24"
aileron sheet.
8. Position the aileron sheeting (which you just made)
flush with the leading edge of the aileron web and the
aileron end cap. Glue the sheeting to the aileron end cap,
the aileron web, the aileron ribs, and the trailing edge of the
bottom sheeting.
9. Use a sanding block to shape the LE web so it
aligns with the tops of the ribs and the shape of the airfoil.
Be careful not to gouge the ribs or LE web.
10. Weight the wing down directly in front of the
aileron LE web to keep it flat on the support jig.
11. Using medium CA, glue a LE sheet to the front
half of the spar. Note: Make sure the sheeting overhangs
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