.
87. Cut to length and glue on the bottom 3/32"x3/4"x21-1/4" balsa sheet for the rear edge of the aileron bay (remember step
79). When dry, use a sanding block sand the top and bottom sheets even with the 1/8"x1/4" wing spars.
88.
Trim to length the 1/8"x1"x24" balsa sheet that caps off the aileron bay. Glue it in place, using tape or pins to hold it until
dry. When dry, carve and sand off the overhanging excess 1/8" sheet flush with the rest of the wing.
89. Cut lengths of 3/32"x3" balsa to sheet over the bottom of ribs W-1 to W-2, from the main spar all the way back to the trailing
edge (remember step 81).
90.
Cut to length and glue in place all the 3/32"x1/4" balsa Cap Strips for the bottom of the wing (remember step 82a). Note,
that here on the bottom of the wing, the two Cap Strips on each side of the aileron servo bay should not be centered over
the ribs, as they were on top of the wing. These two cap strips should be glued along the edge of the ribs so they are
completely outside the servo bay.
91.
The trailing edge of the tip rib should be capped on the bottom with a short piece of the 3/32" sq. balsa (remember step
82b).
92.
Glue the 3/32" balsa Triangle (sheet 25) in at the inboard end of the aileron bay.
93.
When dry, unpin the wing panel from the building board. Use a large sanding block with 80 grit paper to carefully smooth
the entire wing panel. The goal is to only level out any mismatched areas, not to do the final sanding. Sand off any
overhanging balsa sheeting or spars flush with the root rib and the tip rib.
Wing Tip
94.
Locate parts TR-1 and TR-2 (sheet 11). These are small subribs that go on the
outside of the last W-4 rib at the tip end of the wing panel to help support the wing
tip sheet. Refer to crosssection W-4 one the plane to familiarize yourself with their
precise location. Then, glue them in place on the tip rib.
95.
Locate the plywood Wingtips (sheet 27) and balsa parts TS-1, TS-2, and TS-3
(sheet 11). Glue the balsa parts in place on the top and bottom of the plywood
Wingtip.
96.
Locate parts TB-1 (sheet 11), and TB-2
(sheet 5), and glue them in place on the
tip end of the wing panel. TB-1 goes
against the ends of the 1/4" sq. balsa
Main Spars, and TB-2 goes against the
ends of the 3/16" sq. balsa Rear Spars,
as shown on the plans. Make sure these
parts are 90O to the rib.
97.
Locate plywood rib W-6 (sheet 11) and set it in the notches in TB-1 and TB-2. Then, pin the Wingtip assembly (from step
24) in place to the ends of TB-1 and TB-2, to rib W-6, and to the leading and trailing edges of the wing panel. At the leading
edge, make sure the Wingtip lines up with the back edge of the shaped balsa leading edge piece. At the trailing edge, use a
90 deg. triangle to make sure that the tail end of the end rib doesn’t get pushed out of shape while you are gluing on the
wingtip. Once you have all the pieces in correct alignment, glue them together.