Top Flite TOPA0150 - Manual (Page 43)

FINAL CONSTRUCTION
Mount the wing to the fuse
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1. Round one end of the 5/16" x 5" wing dowel. Test
fit the rounded end into the hole in former F-4. If
necessary, sand the end of the dowel so it snugly fits into
the hole, yet will not make removal of the wing difficult.
Glue the dowel into the wing with 30-minute epoxy.
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2. Trim the fuse sheeting even with the ply
crutches. Glue the 1/2" x 7/8" x 4-1/2" filler block to
former 8B and to the fuse sheeting. Sand the filler
block even with the fuse.
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3. Test fit the wing to the fuse. Trim sheeting on
both sides of the fuse until the wing is fully contacting
the 1/8" ply crutches.
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4. Use 30-minute epoxy to glue both 1/2" x 7/8" x
1-1/4" maple wing bolt blocks and both die-cut 1/8"
plywood wing bolt block braces to the fuse
crutches where shown on the plan. Hint: Use a
leftover balsa stick to hold the blocks tightly to the
crutches until the epoxy hardens.
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5. Use the pattern provided on the plan to make
two wing fillet bases from the 1/32" x 19" x 4"
plywood strip. Lightly score both sides of the fillet
bases where shown (at the TE of the wing), then
carefully bend the fillets upward. Add a few drops of
medium CA across both sides of the seam and allow
to dry. Don’t worry if the ends break off, just glue
them back on at the angle shown on the plan.
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6. Tape the fillet bases to the fuse crutches.
Position the wing on the fuse. You may have to trim
the fuse sheeting a little further to accommodate the
fillet bases.
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7. With the fillet bases taped to the fuse and the
wing in position, place the fuse upside-down in a
building cradle. Place weights on the wing to hold it
to the fuse.
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8. Stick a T-pin into the center of the bottom of the
fuse just ahead of the rudder. Center the wing using
the same “pin and string” technique we showed you
for centering the stab.
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9. Refer to the Hot Tip below. Using the wing bolt
plate inside the wing as a guide, drill #7 (or 13/64")
holes through the wing bolt blocks in the fuse.
Some modelers have difficulty drilling accurate
holes in the wing bolt blocks. Here are a few things
you can do to improve your results:
A. Use a #7 (or 13/64") drill or a 3/16" brass tube
sharpened on the end to cut holes through the top
sheeting in alignment with the holes in the wing
bolt plate in the wing.
B. Once the wing is positioned in the fuse as
described in the previous steps, mark the location
of the wing bolt holes on the wing bolt blocks with
a piece of wire dipped into some paint.
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