Top Flite TOPA0400 - Manual (Page 32)

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7. Slide the die-cut 1/8" plywood tank floor
through the notches in former F-3 and align the
forward end of the tank floor with the line you drew
on the back of the firewall. Use CA to glue the tank
floor in position.
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8. Cut the 1-1/4" x 15" balsa triangle stick in
half. Bevel the aft ends of the triangle sticks to
match the angle of former F-3. Use medium CA to
glue the triangle sticks to the fuse sides, former
F-3 and the firewall.
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9. Before the chin blocks are installed, you may
want to fuelproof the tank compartment with
fuelproof paint or 30-minute epoxy thinned
with alcohol.
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10. Edge glue the two 1" x 4" x 5-5/8" balsa blocks
together to make a 1" x 8" x 5-5/8" chin block.
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11. Sand the fuse sides and the 1-1/4" triangle
sticks flush with the bottom of former F-3 and the
firewall. Use medium CA to glue the chin block to
the firewall, former F-3, the fuse sides and the
triangle sticks. Sand the aft edge of the chin block
at the same angle and flush with former F-3. Sand
the forward edge of the chin block and the triangle
sticks flush with the front of the fuse. Roughly
shape the sides of the chin block using the
cross-section on the plan as a guide.
MOUNT THE WING TO THE FUSELAGE
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1. Use a 3/8" drill bit to clean out the wing
dowel holes in formers F-8 and F-8C.
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2. Round the ends of the 3/8" x 3-1/2" wing
dowels and insert the dowels into the wing (do not
glue them yet).
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3. Test fit the wing on the fuselage. The fuse
dowel holes may have to be enlarged slightly to
allow the wing to fit smoothly.
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4. Adjust the parts until the wing fits well on the
saddle. The CLE (center LE) and the wing saddle
may require slight adjustments.
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5. Tape some leftover 1/32" plywood (from the
wing fillet base die-cut sheet) to the wing skin near
the trailing edge and over the spar to simulate the
die-cut 1/32" plywood fillet base being in place.
Again test fit the wing to the fuse. If there is much
interference preventing the wing from seating on
the wing saddle, shape the wing dowel holes
oblong until the interference is gone.
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6. Draw a centerline on the CLE to use as a
reference when aligning the wing.
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