Top Flite TOPA0290 - Manual (Page 23)

FIT
THE FIXED LANDING GEAR
Skip this section if installing retracts.
Note:
Ev
en though the landing gear assemb
ly f
or the
left
wing is sho
wn in the photog
raphs
, both landing
gear assemb
lies could be installed sim
ultaneously
.
❏
1.
Use 30-min
ute epo
xy to glue a 3/4" x 1" x 1" [19
x 25 x 25mm] bass
w
ood
main landing g
ear tor
que
b
loc
k
to one end of a 1/2" x 1" x 2-11/16" [12.7 x 25
x 68mm] g
roo
v
ed bass
w
ood
main landing g
ear rail
.
After the epo
xy has hardened dr
ill a #11 (or 3/16"
[4.8mm]) hole in the middle of the g
roo
v
e
through the
rail and the b
loc
k 1/2" [13mm] from the end.
Be
v
e
l
the opening of the hole to accommodate the bend in the wire
, then test fit the
left
landing gear wire
.
Ref
er to this photo f
or the f
ollo
wing tw
o steps.
❏
2.
Glue together tw
o die-cut 1/16" [1.6mm] plyw
ood
fix
ed landing g
ear plates
.Note that the g
rain direction
of each plate r
uns in the opposite direction.
Use 30-
min
ute epo
xy to glue the plates to the r
ail, b
u
t use care
not to inadv
er
tently glue in the wire gear
.
❏
3.
Secure the gear with tw
o n
ylon landing gear
str
aps and f
our #2 x 1/2" [13mm] scre
ws
.
D
rill 1/16"
[1.6mm] holes f
or the scre
ws
.
D
on’t f
orget to harden
the threads with a f
e
w drops of thin CA.
❏
4.
Install the assemb
ly in the wing betw
een the
landing gear r
ails
, then dr
ill six 7/64" [2.8mm] holes
through the landing gear plates and the r
ails in the
wing f
or the mounting scre
ws
.
R
emo
v
e the landing
gear from the wing and enlarge the holes in the landing gear plate with a 9/64" [3.6mm] or 5/32" [4mm] dr
ill.
Mount the landing gear assemb
ly to the
wing with six #6 x 1/2" [13mm] scre
ws
.
FIT
THE RETRA
CT
ABLE LANDING GEAR
Skip this section if installing fix
ed landing g
ear
.
❏
1.
Remo
v
e
the par
tial cutout in r
ib 3 to
accommodate the wheel.
❏
2.
T
est fit the landing gear into the r
ail.
If the fitting
for the air line on the side of the air cylinder pre
v
ents
fitting the retr
act, the cylinder ma
y be rotated so the
fitting is f
acing at a do
wnw
ard angle
.Then the retr
act
unit should fit betw
een the r
ails
.
A
small cor
ner of the
aft r
ail will ha
v
e
to be tr
immed to accommodate the
oleo str
ut.
❏
3.
Center the landing gear in the r
ails from side-to-
side
.
Mar
k the center of the f
our mounting holes on
the r
ail.
Dr
ill 7/64" [6.7mm] holes through the r
ails at
the mar
ks f
or the mounting scre
ws
.
Mount the retr
act
to the r
ail with the #6 x 1/2" [13mm] scre
ws that
came with the retr
act.
❏
4.
Fit a piece of 3/16" [4.8mm] br
ass tubing into
the str
ut where the axle goes
.
Place a str
aightedge
on the wing par
allel with the spar
.
Adjust the str
ut so
the tubing is par
allel with the str
aightedge and
tighten the str
ut.
❏
5.
Cut the axle to the correct length and mount a
3" [75mm] wheel to the str
ut.
❏
6.
Retr
act the gear into the wing.
T
rim r
ib R3 as
necessar
y so the wheel will fully retr
act.
❏
7.
Remo
v
e
the retr
act unit from the wing.
Add
se
v
e
ral drops of thin CA to the scre
w holes to harden
the threads
.
- 23
-