Great Planes T-Craft 20 Kit - GPMA0155 - Manual (Page 13)

❏ ❏ 13. Hold the die-cut 1/8" plywood dihedral gauge
against the root end of the bottom main spar. With the root
end of the top main spar against the dihedral gauge, insert
and glue the spar into the notches in the top of the ribs.
❏ ❏
14. Center the 3/32" x 5/8" x 30" balsa sub LE on the front
of the ribs. Check that the jig tabs at the aft end of the ribs are
against the building board. Then, glue the sub LE in position.
❏ ❏
15. From the 3/16" x 3/16" x 24" basswood stick, cut two
forward spars 6" long. Align the dihedral gauge with the
centerline of the wing. Glue the forward spars in the top and
bottom of ribs W-2 and W-3 with the root ends against the
dihedral gauge. Make sure that these forward spars are
against the back edge of the slot in W-2.
❏ ❏
16. Cut the 3/32" x 7/8" x 24" balsa stick in half to make
the aileron bay TE. Glue one of the TE pieces, centered, on
the aft end of the W-4 through W-6 ribs and the sub TE.
❏ ❏
17. Cut one of the 1/16" x 1/2" x 24" balsa TE sheets in
half. Test fit the TE sheet in the recess at the aft end of the
W-4 through W-6 ribs and trim as necessary.
❏ ❏
18. From the 1/16" x 3" x 30" balsa sheet, cut and glue
vertical grain shear webs to the spars in the locations
13