Top Flite TOPA0110 - Manual (Page 47)

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2. Cut the flap loose using a razor saw and a
sharp knife. The plans show the proper cut lines.
3. Use a T-bar or sandpaper taped to a flat
table to even up the front edge of the flap.
4. Use a Dremel Moto Tool with a drum
sander or sandpaper wrapped around a dowel to
sand the ribs back to the shear webs inside the
TE. Use a T-bar to true up the aft edge of the
wing sheeting at the flap.
5. Study the flap cross-sections on the plans.
Notice the concave shape of the trailing edge of
the wing. Use dowels of appropriate diameters to
sand the proper hemispherical shape into the
trailing edge of the wing. Be careful not to sand
into the TE shear webs.
NOTE: Be sure to maintain the hinge
locations while shaping the flap
components.
6. Glue the 3/16" x 1" x 18" balsa Flap LE
Cap to the front edge of the flap. Sand the front
portion of the flap to the cross-section shown on
the plan sheet. Test fit the flap to the wing
frequently to check your progress. You should be
able to align the flap TE with the wing and aileron
TE and have a very slight hinge gap at the hinge
line.
7. When the fit is good, install the hinge point