Great Planes Giant Extra 330L Kit - GPMA0250 - Manual (Page 21)

❏ ❏ 22. Position the main center sheet flush against the LE
sheet and the outboard edge of R3. Trim the center sheet
with the center line of the aileron spar. Glue the center sheet
to the LE sheet, ribs, and aileron spar.
❏ ❏ 23. Select the 3/32" x 1/2" x 42" wing trailing edge
sheet, and sand one end so it meets with the center sheet
when aligned with the aft edge of the trailing edge web. Glue
in place to the center sheet, ribs, and trailing edge web.
❏ ❏ 24. Position the die-cut 1/8" ply wing tube bolt block
(WBB) flush with the top of the outboard edge of R4 and the
top of the top spar. Glue it in place.
❏ ❏ 25. Use a small piece of leftover 1/8" ply to secure the
trailing edge of the bolt block to the wing tube socket.
❏ ❏ 26. Cut a 3/4" square from leftover 3/32" balsa. Use this
piece to sheet over the bolt block and R4, allowing sufficient
sheeting to hang over the inboard edge so that the cap strip
will line up properly.
❏ ❏ 27. Using a 7/64" drill bit, drill a hole centered on the bolt
block you just installed, being careful to drill close to but DO
NOT TOUCH the spar. NOTE: The aluminum tube IS NOT
drilled at this step. The tube will be drilled through the hole
you make now when the wing is mounted on the fuselage.
❏ ❏ 28. Using two 3/32" x 3/8" x 36" sticks, cut and glue cap
strips to ribs R4 through R14 between the LE sheet and TE
sheet only.
❏ ❏ 29. Remove the wing from the building board. Trim
everything flush with the root and tip ribs.
❏ ❏ 30. Pin the LE jig to the building board. Place the wing
upside-down on the jig.
❏ ❏ 31. Shape the bottom of the LE web to the airfoil shape
of the ribs as you did the top.
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