19. Glue W21 Dowel Guides to the top and bottom
spars as indicated on the plans. Install so that the
arrow faces up and inward. This will properly align
the hole for the dowel.
20. Slide F23 onto W1. This will provide a guide for
drilling the holes in the leading edge for the dowels.
Mark the holes, and drill or bore ¼” holes in the
leading edge. Remove F23.
21. Cut the dowels to size (approximately 5/8 to ¾”
should extend from the leading edge) and slide
them into the wing. Slide F23 onto the ends of the
dowels to align them. Epoxy the dowels in place
(DO NOT epoxy F23 in place! You’ll need it later)
Remove F23 and set it aside.
22. Sand the top of the center section smooth. Bevel
W2A to match the angle of the ribs.
23. Cut three 5” section from sheets of 1/16 x 4 x 36
balsa, and cut one 5” section from 1/16 x 3 x 36
balsa. Edge glue these sheets.
24. Trim the sheet to fit the outer panel of the center
section. Trim the leading edge to fit, but allow a
slight overlap on the edges; this will be trimmed
later. Allow for at least 1/2” overlap of the trailing
edge. Sheet the angled section. Repeat for the
other side.
25. Trim and sand the sheeting, and carefully trim the
sheeting flush with the inside edge of W2.
26. Cut three 3 1/2” pieces from 1/16 x 4 x 36 balsa
sheet, and one 3 1/2” piece from 1/16 x 3 x 36 balsa
sheet. Edge glue these sheets. Sand the edges
until the sheet lays in the slot between the other
sheets.
27. Cut short pieces from 1/8 x ¼ balsa stock. Glue
these pieces to W2, aligning them with the edge of
the rib. These pieces will form an edge for the
sheeting to lay on.
28. Sheet the center of the wing section.
29. Remove the wing from the board. Remove the tabs
on the ribs.
30. The trailing edge extends ½” past W15 and W16.
Mark this location and trim the trailing edge sheet-
ing. Bevel the sheeting to match the lower rib cam-
ber.
31. If you are building the fixed flap option, add a 3/8”
maple block to W4 in the location shown on the
plans. Glue it flush with the bottom of W4, and sand
to the angle of the ribs.
32. Mark the locations of the flap pushrod exits.
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