Top Flite TOPA0155 - Manual (Page 34)

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3. Align the hole in the drill jig with one of the
reference lines on the wing. Using the drill jig as a
guide, drill a hole for the flap hinge with a 3/32"
[2.4mm] brass tube sharpened on the end. Remove
the brass tube from the drill. Use a piece of wire to
push the balsa plug out of the brass tube.
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4. Drill the rest of the holes in the wing for the
flap hinges the same way.
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5. Use a hobby knife or a rotary tool to enlarge
the openings of the holes to accommodate the
hinges. Test fit the hinges.
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6. Use the drill guide to drill the holes for the
hinges in the inner and outer flap and enlarge the
opening in the holes the same way. Test fit the flaps
to the wing with the hinges. Make adjustments where
required for a good fit.
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7. Bevel the LE of the flaps to allow for control
deflection. Test fit the flaps to the wing and make
certain the flaps can deflect 2" [50mm] as shown in
the control throws section.
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8. Return to step 1 and build the left outer flap the
same way.
Connect the inner flaps to the outer flaps
Start with the right side.
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1. Use a ballpoint pen and a straightedge to
draw a line across the bottom of the inner and outer
flap 1-1/2" [38mm] from the trailing edge. The line
should be parallel to the LE of the inner flap.
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2. Drill a 3/32" [2.4mm] hole through the ends
of the inner and outer flaps at the lines you marked.
The edge of the hole should contact the 3/32"
[2.4mm] balsa flap skin.
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3. Roughen the outside of two 3/32" x 1-1/4"
[2.4 x 32mm] brass tubes with coarse sandpaper.
Glue one of the tubes to the inside of the inner flap
with medium CA. Be careful not to get any CA inside
the tube.
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