Top Flite TOPA0290 - Manual (Page 12)

❏
14.
Prepare the die-cut 1/16" [1.6mm] balsa
rud
der
skins
b
y
cutting out the corr
ugations and gluing on the
corr
ugation fillers the same as the fin skins
.
❏
15.
Remo
v
e
most of the
T
-pins holding the fin
fr
ame
w
o
rk
to the b
uilding board, b
ut lea
v
e
a f
e
w of
them in R1 and R6 to hold the str
ucture do
wn.
Mak
e
sure none of the pins will be concealed under the skin after it has been glued into position.
Ref
er to this photo f
or the f
ollo
wing tw
o steps.
❏
16.
T
est fit the left fin skin to the fr
ame
w
o
rk
and
see ho
w it lines up
.
The bottom of the skin should
align with the dashed line indicating the bottom of the skin on the plan.
After y
ou see ho
w the skin fits
, glue
it into position with medium or thic
k CA.
❏
17.
Glue the left r
udder skin into position the
same w
a
y.
❏
18.
T
a
k
e
out an
y remaining
T
-pins and remo
v
e the
fin/r
udder assemb
ly from the b
uilding board.
❏
19.
T
rim off the jig tabs with a hob
b
y
knif
e
, then use
a r
a
z
o
r plane f
ollo
w
e
d b
y
a bar sander with 80-g
rit
sandpaper to tr
im the leading and tr
ailing edges e
v
en
with the r
ibs
.
U
sing the r
ibs in the r
udder as a guide
,
be
v
el the tr
ailing edge of the left skin to accommodate
the r
ight skin as sho
wn in the sk
etch and on the cross
section of the fin dr
a
wing on the plan.
❏
20.
Ref
err
ing to the plan, cut the
hing
e b
loc
ks
from a 1/2"x 1/2"x 24"[12.7 x 12.7 x 610mm] balsa stic
k.
T
rim the b
loc
ks so that when in position, the
y
will be 1/16"[1.6mm] belo
w the surf
ace of the r
ibs to
accommodate the 1/16"[1.6mm] balsa corr
ugation
filler str
ips on the r
ight side of the fin and r
udder
skins
.
Glue the hinge b
loc
ks into position.
Ref
er to this photo f
o
r steps 22 thr
ough 26.
❏
21.
T
est fit, then glue the r
udder and fin skin into
position on the r
ight side
.
Align them the same as w
a
s
done f
or the skins on the left side of the assemb
ly
.
❏
22.
Sand the leading edge of the skins e
v
en with
the sub leading edge
.
T
rim the bottom of the skins
and the spars e
v
en with r
ib R1 and R1A.
- 12
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