Top Flite TOPA0155 - Manual (Page 37)

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9. Still without glue, join the assembly to the fuse
top on the building board. Join the firewall and the
die-cut 1/8" [3.2mm] plywood fuse bottom (FB) to
the assembly.
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10. Now that everything is together and in
alignment, glue the firewall and the fuse bottom to
each other and to the fuse sides with 30-minute
epoxy. Glue everything else together with CA.
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11. Join formers F4 to the assembly and glue
them into position.
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12. Cut a notch in former F12-B where shown to
accommodate the tail gear pushrod.
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13. Glue formers F9-B through F12-B to the fuse
top. Use a builder’s square to hold the formers
perpendicular to the building board while gluing.
Note: Do not be alarmed if any of the formers are
slightly twisted. The formers will be put into
alignment as the stringers are added.
Refer to this photo for the following two steps.
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14. Cut a 1/4" x 1/4" x 36" [6.4 x 6.4 x 914mm]
balsa stringer to fit from formers F8-B to F12-B, then
glue it into position. As you do so, use a builder’s
square to set the formers perpendicular to the
building board.
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15. Cut two 1/8" x 1/4" x 36" [3.2 x 6.4 x 914mm]
balsa stringers to fit from former F7-B to 6" [152mm]
aft of former F12-B, then glue them into position. Cut
two additional 1/8" x 1/4" x 36" [3.2 x 6.4 x 914mm]
balsa stringers to fit from former F8-B to F12-B and
glue them into position (these stringers do not
appear in photos).
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16. Glue the die-cut 1/8" [3.2mm] plywood former
F13 to the aft fuse top and to the 1/8" x 1/4" [3.2 x
6.4mm] stringers. Use a builder’s square to make
certain F13 is perpendicular to the building board.
Trim the stringers even with F13.
Refer to this photo for the following two steps.
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17. Glue both 3/16" x 3/8" x 40" [4.8 x 9.5 x
1016mm] grooved balsa main stringers into
formers F5-D through F13. Note that the front of the
stringer is even with the front of F5-D.
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