Top Flite TOPA0300 - Manual (Page 18)

❏
12. Chec
k the fit of the
1/4” x 1-7/8”
Do
wels
and the
Wing Bolt Plates
. Mix up a small batch of
6-Min
ute Epo
xy
, then glue these par
ts in position.
NO
TE:
The Wing Bolt Plates m
ust be flush
with the outside surface of the W
-3
’s.
❏
13. T
rim and sand only the bass
w
ood Center
Spar ends flush with the W
-3’
s
. Be sure to
lea
v
e
the
tips
of the Center Aft Spar and the Center
LE in place
as the
y will be used when joining
the center section to the outer wing panels
.
❏
14. Cut a 9-1/4” length from a 3/32” x 1/2” x
30” tapered balsa
TE
stic
k. Look at the cross
section on the fuse plan f
or the angle of the TE.
Center the TE on the aft edge of the center sec- tion r
ibs
, then glue it in place with thin CA.
Carefully sand the ends flush with the W
-3’
s
.
❏
15. T
rim f
o
ur of the pre-cut 1/16” x 2-3/4” x 1-
1/2”
Shear W
e
bs
to fit betw
een the W
-1 and W
-
2 r
ibs at the f
o
rw
ard Center Spars
. Glue the
Shear W
ebs to
both sides
of the Center Spars
with medium CA This completes the wing center section fr
ame
,
so
, zipping r
ight along, let’
s mo
v
e
on to the outer
wing panels
.
HINT
:
Y
ou will speed up the b
uilding process if
y
ou prepare tw
o “wing panel kits” bef
ore y
o
u
star
t gluing. W
e
also suggest that y
ou assemb
le
all f
our spars e
v
en though y
ou ma
y only be
b
uilding one half of the wing at a time
.
❏
1. Place a
wing panel plan on y
our b
uilding
board and co
v
e
r it with w
a
x
ed paper
.
❏❏
2. Cut f
our 1/8” x 3/8” x 24” hard balsa
Outer Spar Doub
ler
s
to 22-3/4”. Sand a chisel
point on
one end
of each piece star
ting
2
”
from
the end.
❏❏
3. Use medium CA to glue the Outer Spar
Doub
lers to the 1/4” x 3/8” x 36” balsa
Outer
Spar
s
. The un-tapered end of the Outer Spar
Doub
ler m
ust be flush with one end of the
Outer Spar
.
❏❏
4. Pin an
Outer Spar assemb
ly
to the
b
u
ilding board at three or f
our locations using
the cross-pinning technique
.
NO
TE: Do not
appl
y glue to Ribs until Step 7.
❏❏
5. P
osition the die-cut 3/32” balsa r
ibs
W-
4
through
W
-14
on the spar
. These should be v
e
r-
tical and aligned o
v
er their appropr
iate locations
as indicated on the plans
.
The
jig tabs
located
near the aft end of the r
ibs should all
contact
the w
ork surface
.
OUTER SPAR
SPAR DOUBLER
2"
Build outer wing panels
WING TE
18