Top Flite TOPA0220 - Manual (Page 32)

❏ ❏ 6. From a 1/16" x 3" x 24" [1.6 x 76 x 610mm]
balsa sheet cut two pieces to a length of 11"
[279mm]. Use medium CA or aliphatic resin to glue
one piece to the top of the flap. Align the skin even
with the LE of the flap.
❏ ❏
7. After the glue dries, remove the flap from the
building board and trim the sheeting along the TE
and both tips.
❏ ❏ 8. Turn the flap over and use a sanding block
to sand the un-sheeted side flat. Use medium CA or
aliphatic resin to glue the second skin to the flap.
Align the skin even with the LE of the flap.
❏ ❏ 9. After the glue dries, remove the flap from the
building board and trim the sheeting along the TE
and both tips.
❏ 10. Build a second flap starting at step 2 above. The
flaps are symmetrical so you can build the second one
over the same plan.
❏
11. Use a file or a rotary tool with a cut-off wheel
to remove sharp edges or burrs on the ends of the
flap joiner. Position the flap joiner on the top of both
flaps as shown on the plan and in the photo. Mark
the leading edge of the flaps where the
arm portion
of the joiner will enter each flap. The center of the
hole will be about 3/8" [9.5mm] from the end.
❏ 12. Drill a 1/8" [3.2mm] hole 1-1/4" deep into the
leading edge of both flaps at the mark you made. Be
sure to drill the hole on the centerline of the leading
edge. Cut a groove in the leading edge to
accommodate the flap joiner. If necessary, remove the
joiner and
tweak it so both flaps are in the same plane.
Hint: Use a 1/8" [3.2mm] brass tube sharpened at
one end to cut the groove.
HINGE THE AILERONS AND FLAPS
Hinge the ailerons and flaps in exactly the same
manner as you did the elevators and rudder.
❏ 1. Use a straightedge to mark the centerline of the
ailerons and flaps as well as the TE of the wing with
a ballpoint pen. Mark the location of the hinge slots
on the ailerons, flaps and wing TE where shown on
the plan. Cut the hinge slots in the ailerons, flaps and
wing TE along the center lines with a #11 blade or
the Great Planes Slot Machine.
❏ 2. Cut twelve hinges to a size of 3/4" x 1" [19 x
25.4mm] from the CA hinge strip. Snip the corners
off so they go into the slots easier.
❏ 3. Test fit the hinges into the slots. If the hinges do
not slide into the slots easily, work your knife blade
back and forth in the slot a few times to provide
more clearance.
❏ 4. Drill a 3/32" [2.4mm] hole, 1/2" [12.7mm] deep
in the center of the hinge slots. Use a rotary tool with
a 3/32" [2.4mm] drill bit or a carbide cutter for the
best results. Reinsert your knife blade to
clean out
the slot after you drill the holes.
❏ 5. Test fit the ailerons and flaps to the wing with
the hinges. If any hinge slots are not wide enough or
are misaligned, make adjustments so the ailerons
and flaps accurately fit the wing.
❏ 6. Bevel the leading edges of the ailerons and
flaps to a “V” as shown on the cross section of the
plan. Use the centerline on the leading edges as a
guide. Test fit the ailerons and flaps to the wing.
Note: Make sure you can obtain the control throws
indicated in the back of the manual. If you cannot,
increase the “V” on the leading edges.
DO NOT glue the hinges until the model has
been covered.
JOIN THE PANELS
❏ 1. Locate both die-cut 1/16" [1.6mm] ply spar
joiners. Trial fit them in the right wing panel, cleaning
any excess glue that may be in the way. The joiner
should go all the way to W2. The angled edge points
to the front of the wing. DO NOT apply any glue.
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