Top Flite TOPA0290 - Manual (Page 40)

❏
5.
The same as w
as done f
or the main landing gear
,
reinf
orce the inside of the bottom sheeting with 3/32"
plyw
ood (not supplied) or lefto
ver balsa.
Cut an opening
in the bottom of the fuselage to accommodate the nose gear
.
Proceed slo
wly to get a nice-looking cutout, b
u
t
mak
e sure y
ou lea
ve
enough room all the w
a
y around so
the gear will ne
ver
“hang up
.”
MOUNT THE
ENGINE
❏
1.
Glue together the three die-cut 1/8" [3.2mm]
plyw
ood f
o
rmers
F1T
.
After the glue dr
ies dr
ill 7/32"
[5.6mm] holes through the tw
o punchmar
ks f
or the top
engine mount b
lind n
uts
.
Install the b
lind n
uts
, then
per
manently glue them in with thin or medium CA.
❏
2.
T
est fit, then glue in F1T into position.
❏
3.
T
empor
ar
ily bolt the engine mount to the fire
w
all
with f
our 8-32 x 1-1/4" [32mm] soc
k
et head cap
scre
ws
, #8 loc
k w
ashers and flat w
ashers
, b
ut don’t
tighten the bolts all the w
a
y.
Adjust the engine mount
to fit y
our engine
, then tighten the bolts
.
❏
4.
Use small C-clamps to hold the engine on the
mount so the bac
kplate of the spinner will be 6-1/8"
[155mm] from the fire
w
all.
❏
5.
Use a Great Planes Dead Center™ Engine
Mount Hole Locator (GPMR8130) or another method to mar
k the engine mounting hole locations on the
engine mount.
❏
6.
Remo
v
e
the engine and dr
ill #29 holes at the
mar
ks
.
Use an 8-32 tap to cut threads into the holes
.
Bolt the mount to the fire
w
all, b
ut don’t tighten the
bolts y
et.
Mount the engine to the mount with f
our 8-
32 x 1" [25mm] soc
k
et head cap scre
ws and #8 loc
k
w
ashers
.
Sug
g
estion:
Use a dr
ill press to dr
ill the
holes in the engine mount if y
ou ha
v
e
access to one
.
❏
7.
Center the engine mount v
e
rtically on the
engine mount bolts
, then tighten the bolts the rest of
the w
a
y.
CONNECT
THE NOSE STEERING AND
THR
O
TTLE
❏
1.
If installing retr
acts
, cut tw
o 4-1/2" [115mm] pieces
from the 12" [300mm] white
, plastic
guide tube
.
Roughen the outside of the tubes with coarse sandpaper so glue will adhere
, then glue them into the
holes pre
viously dr
illed in the fire
w
all and f
o
rmer F2.
Ref
er to this photo f
or the f
ollo
wing three steps.
❏
2.
Mount the throttle and nose wheel steer
ing
ser
v
o
as sho
wn.
If installing retr
acts
, also mount the
air v
alv
e ser
v
o
and the air control v
alv
e with the 1/8"
[3.2mm] plyw
ood
air contr
ol v
a
lve mount
.
❏
3.
If installing retr
acts
, connect the nose wheel
steer
ing cab
les/lines to the ser
v
o
ar
m as sho
wn.
A
Sulliv
an #521 K
e
vlar Pull-pull control cab
le set
(SULQ3121) w
as selected because the K
e
vlar lines
are strong, easy to w
o
rk
with and the s
wiv
el
connectors are pref
erred.
Rather than using the
cr
imp tubes
, knots w
ere tied in the lines and secured
with a small drop of thin CA.
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