Top Flite TOPA0410 - Manual (Page 39)

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Remove
❏ ❏ 5. Use a sanding bar to bevel the edge of the
outboard flap LE so that it fits tightly against the forward
edge of the ribs and flap skin. The LE will hang over the
forward edge of the flap skin. When satisfied with the fit,
glue it in position.
❏ ❏ 6. Use a razor plane and sanding bar to bevel the LE
and the flap skin to the same angle as the ribs.
❏ ❏ 7. From the 1/2" x 1/2" [12.7mm x 12.7mm] balsa
stick, cut 3/4" [19mm] long hinge point backups and glue
them to the back of the LE and the flap skin.
❏ ❏ 8. Glue the second balsa flap skin to the top of the
LE, ribs and bottom flap skin.
❏ ❏ 9. Sand the LE and flap skins flush with the end ribs.
❏ ❏ 10. Glue the die-cut 1/8" [3.2mm] plywood flap ends
to the ends of the outboard flaps, aligning the front of the
plywood flap end and the LE. The flap end with the two
punch marks goes on the inboard end. Use a leftover
piece of 3/32" [2.4mm] balsa to fill in the corner between
the LE and the flap skin.
❏ ❏ 11. Use a sanding bar to sand the LE and flap skins
flush with the plywood flap ends.
❏ ❏ 12. Drill a 3/32" [2.4mm] hole through the flap end, at
each punch mark. Use a hobby knife to finish making the slot.
❏ ❏ 13. If you are installing Robart hinge points, drill 3/16"
[4.8mm] holes into the wing TE approximately 1/4"
[6.4mm] above the bottom of the bottom wing sheeting at
the previously marked hinge locations. These holes
should angle slightly toward the center of the wing.
See the flap detail on the wing plan.
❏ ❏ 14. With the ailerons temporarily mounted on the
wing, tack glue a leftover piece of 1/16" [1.6mm] plywood
to the inboard end of the aileron.
❏ ❏ 15. Hold the outboard flap against the wing and the
1/16" [1.6mm] spacer on the aileron. Mark the hinge
locations on the flap. Drill 3/16" [4.8mm] holes in the LE of
the flaps in the same manner as the wing. Remove the
1/16" spacer and trial fit the flap on the wing making any
adjustments as necessary. As the flap moves down make
sure the hinges do not pull out. If they do, increase the
radius on the bottom of the flap LE.
❏ 16. Return to step 1 of Build The Outboard Flaps and
build the other outboard flap.