32
Ref
er to this photo while hooking up the rest of
the air system.
❏
3.
Connect appro
x
imately 2" [50mm] of air line
to the air tank that came with the retr
acts
. Slide the
air tank into the holes in the front tw
o f
o
rmers in the
fuselage
, b
u
t do not glue the tank in place y
e
t.
❏
4.
Glue the air control v
a
lv
e mount to the r
adio tr
a
y.
Mount y
our retr
act ser
v
o
.
Then, connect the ser
v
o
to
the v
a
lv
e with a 4" [100mm] pushrod cut to the correct
length, a n
y
lon ball link and a scre
w
-loc
k
connector
on the ser
v
o
with a n
y
lon retainer and a 4-40 SHCS
.
❏
5.
Cut the co
v
e
ri
ng from the hole in the left side of
the fuselage f
o
r the air v
a
lv
e mount.
Glue the fi
ll
v
a
lv
e
mount to the inside of the fuselage
.
❏
6.
Use the remaining
“T”
fi
ttings to connect the rest
of the air lines
. Glue one of the plyw
ood
guides
to
the r
adio tr
a
y
f
o
r k
e
eping the air lines and ser
v
o
wires
organiz
ed.
Y
o
u can glue another guide to one of the
fo
rmers f
a
rt
her aft inside the fuselage
.
❏
7.
If y
ou ha
v
e
n’t done so already
, cut the co
v
e
ri
ng
from the holes in both sides of the fuselage f
o
r the air
lines and ser
v
o
wires to come out.
Mak
e
sure the up
and do
wn lines going bac
k through the fuselage f
o
r
the main landing gear are long enough to come out of
the holes in both sides of the fuselage f
o
r connecting
to the lines coming from the inboard wing panels
. Use
quic
k
disconnects on the ends of the lines
.
❏
8.
Use R
TV silicone or epo
xy to glue the air tank
into position—be cer
tain the base
, or front of the tank
(f
acing the front of the fuselage) does not protr
ude
more than 1/8" [3mm] f
o
rw
ard of the front f
o
rmer
.
Otherwise
, it will interf
ere with the bac
k of the scale
nose-gunner cabin.
One Final Note About Retracts:
T
e
st the retr
act
system either no
w
, or later when y
ou ha
v
e
completed
the rest of the r
adio installation.
With all three landing
gears connected and oper
ating, fi
rst test the system
with the plane upside-do
wn in the b
u
ilding cr
adle
.
This will allo
w y
ou to identify and troub
le-shoot an
y
prob
lems
. Once the gear is w
o
rk
ing satisf
actor
ily
,
retest the system with the model upr
ight in the stand.
Pressur
izing the tank up to 120 psi.
should allo
w f
o
r
tw
o full cycles
, b
u
t w
e
ha
v
e
pressur
iz
ed ours up to
140 psi.
Use caution when using e
x
treme pressure
. If
the model sits in the sun f
o
r e
x
tended per
iods dur
ing
hot w
eather the lines can soften and pressure in the
system could r
ise
.
COMPLETE THE
RADIO
INST
ALLA
TION
Ref
er to this photo while mounting the receiver
and s
w
itc
hes.
❏
1.
Glue the plyw
ood
receiver mounts
to the r
adio
tr
a
y
to fi
t y
o
ur receiv
e
r.
Mount the receiv
e
r with R/C
fo
am r
u
b
ber and a couple of r
u
b
b
er bands
.
❏
2.
Cut the sheeting on the outside of the fuselage
o
v
er the mounting locations f
o
r the receiv
e
r on/off
s
w
itch and an e
x
ter
nal charging receptacle
. An Er
nst
#124 Charge Receptacle is sho
wn.
Bef
ore mounting
the charge receptacle
, slide the mounting bac
k plate
o
v
er the batter
y
charging wire coming from the on/off
