15
Step 3: 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 ea 6” bar clamps;
2 pieces of scrap lite plywood (~ 1” x 8”), wax paper. 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,
and the bar clamps. Make sure ailerons are removed from wing.
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 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 pan-
els together.
Check Fit and Secure Wing Panels:
Place at least six (6) rubber bands (or bar clamp) over the wing
dowel pins and the aileron shoulders to draw the wing’s leading edge
together. Check to make sure the fit is correct and all surfaces align
and match flush. Wipe off any squeezed out epoxy using a rag and
denatured alcohol as necessary.
NOTE:
Removal of covering to install belly pan
. You may
place the belly pan on the wing bottom, while the wing is on the fuse-
lage, draw a line along edge of pan, cut only through the covering and
remove covering material.
Secure Trailing Edge:
Using the wing-bolt plate, insert the two wing-bolts through the
plate and then through the holes in the wing. Use a bar clamp in the
aileron shoulder. 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)
