Sheet The Top Of The Wing - GREAT PLANES Profile 38 Instruction Manual

3. Fit the R7A jigs under the W-7 ribs and the R1B jig
under the W-1 ribs so that the aft edge of the jigs are flush
with the trailing edge of the wing. Apply 30-minute epoxy to
the root ribs and use clamps to hold the wing halves
together. Apply epoxy to the front of the wing joiner and
insert it through W-1 as shown. The forward joiner is against
the shear web and the aft joiner is against the main spars.
Wipe off any excess epoxy and use clamps to hold the
joiner in position until the epoxy cures.
4. Use epoxy to glue the die-cut 3-ply sub-leading edge
joiner in the front of the W-1 ribs and the sub-leading edge.
5. Use a planer and bar sander to trim the sub-trailing
edge flush with the top of the ribs. Taper the tip of the sub-
trailing edge so that the trailing edge strip can be glued to
the wing tip.
6. Use a bar sander to taper the trailing edge sheeting to
match the taper on ribs W-1 through W-3. See the wing
cross-section on the wing plan.
7. From the 1/2" x 1/2" x 12" [13mm x 13mm x 305mm]
balsa stick cut six 1-1/2" [38mm] long hinge blocks. Glue the
hinge blocks in position against the sub-trailing edge.

Sheet the Top of the Wing

1. With the wing setting on the wing jigs, cut and glue 5/8"
[16mm] balsa sub-trailing edge strips to the top of the ribs
and the sub-trailing edge.
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