Top Flite TOPA0300 - Manual (Page 15)

❏
11. Remo
v
e
the fin from the b
u
ilding board
and tr
im off the jig tabs
. Blend the LE and TE to
the r
ibs on the r
ight side of the fin.
NO
TE:
If y
ou plan to r
oute wiring f
or a bea-
con thr
ough the fin, install a 15
”
length of
outer pushr
od tube (not supplied) thr
ough
the 3/16
”
holes y
ou drilled in step #2. Glue it
in position with medium CA, lea
ving the
e
xcess tube pr
otruding fr
om V
-1.
❏
12. Use medium or thic
k CA to glue on the
right side skin. Be sure to get a good bond betw
een the r
ibs and the skin.
❏
13. T
rue up the edges of the fin sheeting with
a sanding b
loc
k. Shape the LE to match the
cross section on the plans
. Don’t tr
im the bottom
edge of the sheeting at this time
.
❏
14. Glue the shaped 3/4” balsa
Fin Tip
to the
top of the fin. Shaping should be done later
, with
the fin taped to the r
udder
.
NO
TE:
If ad
ding a beacon light, drill a hole
thr
ough the top of the Fin Tip that aligns with the wiring tube bef
ore y
ou glue it in place
.
❏
1. Use one 1/16” x 3” x 30 balsa sheet to
mak
e tw
o
rud
der skins
, using the r
udder skin
patter
n on the wing plan. Y
ou will need to edge
glue a small w
edge shaped piece of sheeting to
the TE of the skin to pro
vide the correct width.
Y
ou should ha
v
e
more than enough mater
ial left
o
v
er from the pre
vious assemb
lies to accomplish
this step
.
❏
2. Pin one of the r
udder skins to the (w
ax
paper co
v
ered) plans and dr
a
w
the location of
each r
ib using the “tic” mar
ks as a guide
. Dr
a
w
a
line the length of the r
udder skin, 3/8” in from the
aft edge
, as y
ou did with the ele
v
ators
. Remo
v
e
the r
udder skin from the board and taper the aft
edge to 1/32”. T
aper the aft edge of the other
rudder skin to 1/32”. (See ne
xt photo
.)
❏
3. Locate the 3/8” x 3/4” x 12” tapered balsa
rud
der LE
. Cut the tips to match the s
w
eep
angle of the r
udder
. Lightly sand both sides of
the r
udder LE to match the angle to
w
a
rd the aft
edge of the r
udder
.
❏
4. Re-pin the r
udder skin o
v
er the plans
. Glue
the r
udder LE to the surf
ace of the r
udder skin,
flush with the front edge
, using medium CA. The
wide end of the r
udder LE is at the bottom end
of the r
udder
.
❏
5
. Slightly taper the f
orw
ard edge of the r
udder
ribs
R-1
through
R-6
to match the s
w
eep angle of
the r
udder LE, then glue them in position o
v
er
the location lines that y
ou dre
w in step #2.
❏
6. Shape one end of the 1/4” x 1/2” x 1-1/4”
balsa r
udder
T
o
rque Bloc
k
to match the angle
at the intersection of the r
udder LE and R-1.
Glue the T
orque Bloc
k in position when satisfied
with the fit.
❏
7
. Remo
ve
the r
udder assemb
ly from the board,
then lightly sand the fr
ame to b
lend all joints
. Glue
the second r
udder skin to the fr
ame with thic
k CA.
T
o
pre
vent twists
, be sure that the assemb
ly is held
on a flat surf
ace while the CA cures
.
EXCESS
30"
3"
Build the rud
der
15