Great Planes Extra 300S 40 Kit - GPMA0235 - Manual (Page 14)

B. Use masking tape to tightly tape the two sheets together
joining the trimmed edges.
C. Turn the sheet over and place weights on top of the
sheet to hold it flat. Apply thin CA sparingly to the seam
between the two pieces quickly wiping away excess CA
with a paper towel as you proceed.
D. Turn the sheet over and remove the masking tape, then
apply thin CA to the seam the same way you did for the
other side.
E. Sand the sheet flat and smooth with your bar sander and
150-grit sandpaper.
❏ ❏
12. Cut the sheet as shown in the photo to make a
top and a bottom LE wing sheet.
❏ ❏
13. Fit one of the leading edge sheets to the bottom
of the wing panel by first sanding a bevel on the front edge
of the sheet so it matches the leading edge of the wing,
then trim the aft edge of the sheet so it “ends” at about the
middle of the main spar.
❏ ❏
14. Before you glue the LE sheeting in position,
remove the T-pins from the front jig tabs in the wing ribs.
Reinstall the T-pins through the top main spar and into your
building board.
❏ ❏
15. Wet the outside of the leading edge so it will bend
easier.
Hint: a 50/50 mix of water and alcohol or ammonia helps
soften the wood fibers so the sheet is even easier to bend.
Position the front of the sheet against the LE and glue it in
position with thin CA. Wet the sheet once more.
❏ ❏
16. Carefully lift the sheeting away from the ribs, then
apply a bead of medium or thick CA to the top of each rib.
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