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Step 4: Join Wing Panels:
Gather together the following items: Wing panels (2); dihedral brace; 2-part, 30-
minute epoxy; epoxy brush; mixing cup, clamps (4); rubber bands #64; 2 pieces of scrap
lite plywood (~ 1” x 8”). Be sure you have placed the wing servo-extension cables in the
wing as described in step 2.
Gather and Layout Wing Panel & Materials:
Assemble the materials as described above on a flat surface at least
60” long. You will need at least six (6) each # 64 or stronger rubber bands.
Also have handy the wing bolt backing strip (~ 1/8” thick lite-ply with two 1/
4” holes in it) and the 1/4” nylon wing mounting bolts.
Dry Fit to Check Fit & Alignment:
Measure and mark the center of the dihedral brace. Dry fit the
Dihedral Wing-Brace into the wing-box and push the two wing panels
together to check for proper fit and alignment. The beveled edges of
the wing-brace face forward. The top, bottom and wing edges should
align evenly and the root rib of each wing panel should fit perfectly flush
to each other. When you are satisfied with the fit, proceed to next step.
Apply Epoxy and Assemble:
Mix a generous amount of 30-minute epoxy and using the epoxy
brush, apply a liberal amount of epoxy into the wing-box, one-half of
the dihedral brace and fit the brace into the wing box up to the center
mark. Apply epoxy to the surface of the root rib. Repeat for the other
wing panel..... be sure to epoxy both rib roots. Slide the two wing
panels together
Check Fit and Secure Wing Panels:
Place at least six (6) rubber bands over the wing dowel pins to
draw the wing’s leading edge together. Check to make sure the fit is
correct and all surfaces align and match. Wipe off any squeezed out
epoxy using a rag and denatured alcohol as necessary.
Secure Trailing Edge:
Using the wing-bolt plate, insert the two wing-bolts through the
plate and then through the holes in the wing. This will bring the trailing
edge together. It may be necessary to push the panels together by
bracing one wing-tip against a solid object and applying pressure to the
opposite wing tip to push them together. Using the two scrap pieces of
lite-ply, place one on the top and one on the bottom of the wing at the
trailing edge. Clamp in place.
(See Optional Assembly Step:
“Fiberglass Wing Bottom” ... “WPFG-1”, on page 34)
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