Great Planes Profile 38 - GPMA0487 - Manual (Page 12)

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13. Position the die-cut 3-ply sub-leading edge over
the tabs on the front of the ribs. As you glue the sub-leading
edge to the ribs, make sure the sub-trailing edge and main
spar is down on your building board.
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14. Glue the two die-cut 3-ply wing tip pieces together
as shown on the plan.
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15. Glue the wing tip to the sub-trailing edge, shear web
and rib W-7.
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16. Using a sanding bar with 220-grit sandpaper, lightly
sand the top of the ribs, main spar, sub-leading edge and
sub-trailing edge all flush.
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17. Use epoxy to glue the hardwood landing gear rail in
the notches of ribs W-2 and W-3. Make sure that the landing
gear rail protrudes above the ribs by 1/16" [1.6mm] and is
flush with the side of rib W-3. Before the epoxy hardens,
wipe off any excess from rib W-2 using a paper towel
dampened with denatured alcohol.
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1. From one of the 1/16" x 3" x 30" [1.6mm x 76mm x 762mm]
balsa sheets, cut a 1/16" x 5/8" x 30" [1.6mm x 16mm x
762mm] trailing edge strip. Glue the strip to the sub-trailing
edge, ribs W-1 through W-7 and the wing tip.
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2. True one edge of a 1/16" x 3" x 24" [1.6mm x 76mm
x 610mm) balsa sheet to make a leading edge sheet. The
sheet is installed from the middle of the main spar to the
sub-leading edge by first applying medium CA along the
front half of the main spar, the edge of the ribs and the sub-
leading edge. Position the sheet on the main spar and
slowly press the sheet down onto the ribs and leading edge.
Use a sanding bar to press the sheet down evenly.
Sheet the Wing Panels
12