D D 11. Insert the front ends of the ribs into the notches
in the LE. NOTE: Position the LE as shown in the following
sketch. CENTER L.E.
VERTICALLY ON
FRONT OF RIBS
D D 15. Lightly sand the tops of the ribs to blend with
the notched trailing edge; then glue one of the 3/32" x 1-1/4"
x 32" balsa trailing edge sheets in place. NOTE': The edge
of the TE sheet may not be exactly straight, but just position
the sheet so it slightly overlaps the TE, and any overlap can
be sanded off later.
D D 16. Before applying the leading edge shecting in
the next step, use your T-bar to lightly sand off the edges of
the shear webs and smoothly blend the ribs to the spar.
D D 17. Prepare the 3/32" x 2-5/8" x 30" balsa leading
edge sheeting by sanding the front edge to a slight bevel so it
will fit snugly against the back of the leading edge. (Check by
trial fitting)
D D 12. Make sure the ribs are fully down on the plan
and all ribs are inserted into the LE notches. Glue the W-2 and
W-3 ribs to the LE and bottom spar.
D D 13. Insert the top spar into the notches in the ribs.
From the excess 1/4" x 3/4" balsa (used in the fin & stab con-
struction), cut two pieces, 2-1/2" long. Insert one of these
1/4" x 3/4" x 2-1/2" balsa spar fillers between the top and
bottom spars in the area between W-l and W-2 (to hold the
spars apart at the proper spacing), then glue the top spar to the
ribs. Glue the spar filler to the spars.
D D 14. Glue five of the pre-cut 3/32" balsa vertical
grain shear webs to the rear edge of the spars in the locations
shown on the plan. NOTE: The webs must be securely glued
to the spars, but it is not necessary to glue the webs to the ribs.
NOTE: In the next steps, maintain straightness by
keeping the wing down on the Hat surface and on the
TE Jig.
NOTE: It will be helpful to have the following items
handy for the next step... thin CA, thick CA, a wet cloth,
masking tape and T-pins. Read through the following
step and go through a "dry run" before actually gluing.
D D 18. Position the leading edge sheeting at the rear
edge of the notched LE so it is just overlapping rib W-2.
Using thin CA, glue the front (beveled) edge of the leading
edge sheeting to the back edge of the LE. Now wet the top
surface of the sheeting so it will bend easier. Apply thick CA
glue to the top edge of the ribs and to the front half of the spar,
then immediately bend the sheeting down onto the ribs and
spar. Hold the sheeting down with masking tape, pins and
your hands until the glue has set.
11
Summary of Contents for Super Decathlon 40
Page 4: ...DIE PATTERNS Usethis drawing to help you identify the die cutparts 4...
Page 42: ...42...
Page 43: ...43...
