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63.
Now spray the entire top surface with 3M Super 77 (“multi-purpose”) spray adhesive and let
dry for 5 minutes (or until aggressively tacky).
64.
Apply cross-weave filament tape patches over the servos and receiver (if mounted flush with
the top surface) to help hold them securely in place.
65.
Apply strips of filament tape to the top surface of the wing as per illustration (same as
bottom surface). You may need to cut out little sections of the tape to allow for servo arm
movement and any protruding wires or switch.
66.
Lay a piece of cross-weave filament tape along the spar slot, positioned so that about 1/3 of
the width of the tape is behind the spar slot and 2/3 in front of it. Wrap around the ends of
the tape at the tips.
67.
Spray the leading edges of the wing with 3M Super 77 spray adhesive and let dry for 5
minutes (or until aggressively tacky).
68.
Using cross-weave filament tape, lay a length along each of the five wing panels’ leading
edges so that half of the width is on the top surface and half on the bottom surface. Split and
overlap the tape at the panel joins and split and wrap around at the noses and wing tips.
69.
Spray the underside of both balsa ailerons and balsa elevator and the underside of the foam
sub trailing edges with spray adhesive. Let dry for 5 minutes (or until aggressively tacky).
70.
Split a length of filament tape in half and cut into nine (9) 65mm (2 1/2”) long strips to be
applied shortly.
71.
The balsa ailerons are orientated so that
their narrower end is at the wing tip.
Position one of the ailerons so that there is
a 2mm (3/32”) gap between its end and the
end of the fixed balsa trailing edge and lay
it upside down on top of the wing so that
its leading edge is in line with the foam sub
trailing edge. Use the 65mm (2 1/2”) long,
25mm (1”) wide, strips of filament tape to
attach the balsa aileron to the foam wing
by wrapping around pieces at either end
and in the middle of the aileron.
72.
Now rotate the aileron around so that it is
in its correct position, butted up against the foam trailing edge with the 45 degree beveled
opening at the bottom.
73.
Repeat this process for the second aileron.
74.
Repeat this process for the elevator, ensuring that the elevator is centered between the
trailing edge pieces with an adequate gap at each end (around 2mm).
75.
Spray the top of both balsa ailerons and elevator and the rear portion of the adjoining foam
sub trailing edges with spray adhesive. Let dry for 5 minutes (or until aggressively tacky).
76.
Lay strip of cross-weave filament tape down the entire hinge line of one aileron on the top
surface, positioned so that 1/3 of its width is on the aileron and 2/3 on the foam.
77.
Repeat this same process for the second aileron and elevator.
78.
If you feel inclined, you can now iron down all the filament tape with very low heat, paying
particular attention to the tape edges. This helps it adhere to the foam a little better,
smoothes out minor wrinkles and can help make it less visible after covering.
