Top Flite TOPA0155 - Manual (Page 29)

❏ ❏
17. If building flaps, use the remainder of the
3/8" x 3/8" x 30" [9.5 x 9.5 x 762mm] balsa stick
(used for the flap hinge blocks for the center section)
to make the flap hinge blocks for the outer panel.
Glue the hinge blocks into position. Remember that
the hinge blocks are to be even with the bottom of
the ribs.
❏ ❏
18. Sand the bottom main spar and the bottom
of the outer LE spar even with the bottom of the ribs.
Prepare a bottom wing skin the same as the top wing
skin, then sheet the bottom of the wing. Do not glue
the bottom skin to the hatch supports.
❏ ❏
19. Trim the top and bottom sheeting even with
both ends of the panel and the outer LE spar. Trim
the bottom of the mid and outer TE spars even with
the bottom sheeting. Trim the bottom of the aileron
spar even with the bottom of the ribs.
❏ ❏
20. Glue the 1/4" x 1" x 24" [6.4 x 25.4 x
610mm] leading edge to the LE spar and wing
sheeting. Shape the LE to match the wing, but do not
round until instructed to do so.
❏
21. Cut the right wing panel plan from the wing
plan and place it over the building board. Cover the
plan with Plan Protector and return to step 2 and
build the right wing panel.
Build the ailerons
❏ ❏
1. Build the left aileron first. Make a bottom
aileron skin from a 3/32" x 3" x 24" [2.4 x 76 x
610mm] balsa sheet using one of the die-cut 3/32"
[2.4mm] balsa top aileron skins (TAS) as a pattern.
❏ ❏
2. Glue together both parts of the die-cut 3/32"
[2.4mm] balsa outer flap skin (OFS). Sand both
sides of the flap skin flat. True the tip end by sanding
straight. Place the skin over its location on the wing.
Carefully examining the plan, note which end of the
skin is the tip and which end is the root (they may
easily be confused). Sand the inside of the outer flap
skin smooth for painting later.
❏ ❏
3. Test fit the outer flap skin to the top of the
wing. If necessary, trim the front of the skin so the TE
will be even with the aileron skin. Glue the flap skin
into position.
❏ ❏
4. Trim the top of the aileron spar even with the
tops of the ribs. Glue the top aileron skin into
position on the top of the aileron. Note that the skin
extends 1/8" [3.2mm] beyond rib W12.
❏ ❏
5. Glue the die-cut 3/32" [2.4mm] balsa aileron
rib (AF) to the aileron as shown. Make a half-rib for
the end of the outer flap skin from leftover 3/32"
[2.4mm] balsa and glue it to the end of the flap with
a 1/16" [1.6mm] gap between the aileron rib. Cut the
control horn mount from leftover 3/8" x 3/8" [9.5 x
9.5mm] balsa and glue it into position.
❏ ❏
6. Make the aileron tip rib from leftover 1/8"
[3.2mm] balsa and glue it into position.
❏ ❏
7. Using the aileron ribs as a guide, use a bar
sander with 80-grit sandpaper to bevel the TE of the
top aileron skin.
-29-