Top Flite TOPA0290 - Manual (Page 57)

❏
8.
Remo
v
e
the wing.
T
ap 1/4-20 holes into the
holes dr
illed in the wing bolt b
loc
ks
.
Add a f
e
w drops
of thin CA to the threads
, allo
w to fully harden, then
retap the threads
.
❏
9.
Enlarge the bolt holes in the wing with a 17/64"
[6.7mm] dr
ill, then bolt the wing to the fuselage with
tw
o 1/4-20 x 2" [50mm] n
ylon wing bolts
.
Cut holes in
the bottom sheeting to accommodate the heads of the bolts
.
❏
10.
T
est fit the wing to the fuselage and bolt it do
wn
with tw
o 1/4-20 x 2" [50mm] n
ylon bolts
.
See ho
w it
looks and mak
e an
y adjustments where necessar
y.
B
U
ILD
THE BELL
Y P
A
N
❏
1.
Cut a 20" [510mm]
bell
y pan side
from a 1/4"
x 3/4" x 30" [6.4 x 19 x 760mm] balsa stic
k.
Mak
e
another belly pan side the same w
a
y.
Sa
v
e
both 10"
pieces f
or the front and bac
k.
❏
2.
Mar
k the middle of one of the belly pan sides
.
Place it on the bottom of the fuselage aligning the line with the glue joint in the middle of the bottom sheeting.
La
y a ballpoint pen on the bottom of the
wing and mar
k
the cur
v
ature of the wing onto the
belly pan side
.
Also mar
k the stic
k at the front and
bac
k of the wing saddle in the fuselage
.
❏
3.
Cut the belly pan side at the mar
ks on both
ends
, then cut it on the cur
v
ature line y
ou mar
k
ed.
Reposition the belly pan side and mar
k another
cur
v
ature line
, then cut again.
Once more
, mar
k,
then cut.
No
w the belly pan side should fit the wing
w
ell.
T
rim where necessar
y f
o
r a good fit.
❏
4.
Mak
e
the other belly pan side the same w
a
y.
❏
5.
Pin a lefto
v
er 3/16" x 3/16" [4.8 x 4.8mm] balsa
stic
k along one side of the fuselage under the wing.
This will re
v
eal the location of the belly pan side
making a smooth tr
ansition betw
een the front and
the bac
k of the wing saddle
.
Use a ballpoint pen to
dr
a
w
the location of the belly pan side along the
balsa stic
k.
Mar
k the other side of the bottom of the
wing the same w
a
y.
❏
6.
Glue the belly pan sides to the bottom of the
wing along the lines
.
Ref
er to this photo f
or the f
ollo
wing three steps.
❏
7.
Use the remaining tw
o 1/4" x 3/4" x 10" [6.4 x
19 x 250mm] balsa stic
ks to mak
e the front and bac
k
of the belly pan.
Glue the stic
ks into position.
Hint:
Use thin cardstoc
k to shim the front and bac
k
of the belly pan a
w
a
y
from the fuselage
.
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