Top Flite TOPA0290 - Manual (Page 25)

SHEET THE
BO
TT
OM
OF THE
WING
❏
1.
T
rim the jig tabs from the r
ibs on the bottom of
the wing.
Sand the flap ba
y tr
ailing edge
, the aileron
ba
y sub tr
ailing edge and the sub leading edges
e
v
en with the bottoms of the r
ibs
.
❏
2.
If
not
b
uilding w
o
rking flaps
, cut out the
corr
ugations from a die-cut 1/16" [1.6mm] balsa
flap
skin
.
Glue the flap skin to the wing, then glue on the
1/8" x 1/4" x 30" [3.2 x 6.4 x 760mm] balsa
TE
suppor
t and the corr
ugation filler str
ips
.
U
se the r
ibs
on the bottom of the wing as a guide to sand the
TE
suppor
t and the top flap skin to accommodate the
bottom flap skin.
❏
3.
If b
uilding w
o
rking flaps
, cut three 1-1/2" [40mm]
flap hing
e b
loc
ks
from the 3/4" x 3/4" x 12" [19 x 19
x 300mm] balsa stic
k.
Shape the hinge b
loc
ks to fit
the flap ba
y tr
ailing edge
, then glue them into
position where sho
wn on the plan.
Sand the hinge
b
loc
ks e
v
en with the bottom of the wing.
❏
4.
If b
uilding w
o
rking flaps
, tr
im the r
ibs and top
sheeting aft of the flap ba
y tr
ailing edge as sho
wn.
❏
5.
Assemb
le the three die-cut 1/8" [3.2mm] plyw
ood
wing cradles
b
y
gluing the
“f
eet”
onto the suppor
ts
.
❏
6.
Use thic
k or medium CA to tac
k glue the cr
adles
to the top wing sheeting directly o
v
er the respectiv
e
ribs—just a drop of CA in a f
e
w areas is all that is
required.
❏
7.
Use lefto
v
er 1/16" [1.6mm] sheeting and a
lefto
v
er 1/8" x 1/4" [3.2 x 6.4mm] balsa stic
k to sheet
the
top
of the wing and the
TE suppor
t o
v
er the R9
ribs at the wing tip
.
Sand the sheeting and
TE
suppor
t e
v
en with the bottom of the r
ibs
.
❏
8.
T
rim one of the aft wing skins to fit the bottom of
the wing.
If b
uilding flaps
, the skin should e
xtend
slightly be
y
ond the flap ba
y tr
ailing edge f
or tr
imming
later
.
If b
uilding fix
ed flaps the skin should e
xtend
only to the
mid
dle
of the flap ba
y tr
ailing edge
.
In
both cases
, the front of the skin should align with the
middle of the bottom spar
.
Glue the skin into position,
b
ut do not glue the skin to the flap or aileron hatch
rails or to the r
ibs betw
een the r
ails
.This will f
acilitate
the cutting of the sheeting f
or the hatch co
v
e
rs later
.
Glue another piece of lefto
v
er 1/16" [1.6mm]
sheeting to the bottom of the wing o
v
er the R9 r
ibs
.
❏
9.
If b
uilding fix
ed flaps glue the corr
ugations to
the inside of another flap skin, test fit, then glue the skin into position.
❏
10.
Fit, then glue the f
orw
ard wing skin into position.
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