Retlactable
undercartiagc
It
you
intend
installing a
retractable undercarriage
or a
fixed wheel,
its
axle
should
be vertically
below the
wing r00t leading
edge. Place
the
luselage on
a flat surface
and hold a set
square against
the
wing root
fairing.
Now sight along
the underside
of the
fuselage; this
will
enable
you
t0 establish
the correct
position
ol
the wheel
with reasonable
accuracy.
The full-size
aircralt
has a 350
m.m.0 wheel,
which
corresponds
to a
diameter ol about
90 m.m.
for the model.
ll
you
are
fitting a retractable
undercarriage,
be sure
t0
provide
adequate
clear-
ance to
the servo
located above
it.
Complcssion
strut
The compression
strut,
part
7, is fitted between
the wing
leading
edges
in lront ol
the wing
joiner
unit
t0
prevent
the luselage being
crushed
by
the wings in a
hard landing. Please
reler to the drawing
for
its exact
location.
The compression
strut
is litted in the lorward
part
of the
wing ro0t
lairing, but
it is not
glued
in
place.
The exact
position
ol the strut
varies
according
to the servos
in use, but
it
should
be located as
far forward
as Dossible.
An 8 m.m. 0
hole has to be drilled
in both sides 0f
the wing
fairing;
we recommend
that
you
drill
7 m.m.
pilot
holes, and then
carefully
file them out until
the compression strut
is a tight
fit. This
should
avoid
the strut
lalling 0ut and
getting
lost. Cut the compression
strut
to exact
length;
it must end up
flush with the outside of
the
fuselage
wing root fairings.
Position
the canopy
frame and
hold it down
firmly onto
the luselage
by
tying thin
thread
(sewing
cotton)
round it; don't
worry,
the thread can
easily be
removed again
later.
lf necessary,
tape the ends ol
the thread
to the
fuselage.
Place the canopy
on
the lrame and
position
it
accurately,
then apply
a short strip
of coloured
sticky
tape across
the
canopy/fuselage
joint
at
front and
rear,
parallel
with the
luselage
centreline.
Now slit
the tape along
the
joint.
This
provides you
with
precise
alignment
marks
for the location
of the canopy.
This
is very
important, as
there is
little room for error
when
gluing
it in
place
later'
Clean
the canopy and
the canopy
lrame, then apply
contact cement
t0
the edge of the canopy
frame only.
lt is essential
to work
fast here, as
the contact
glue
must not be allowed
t0 dry.
ote: Do
not apply contact
cement to
the canopy.
Place the canopy on
the
trame, using
the
pieces
ol coloured
tape
to align
it. Hold the
canopy
in
place
with strips
ol tape, and
carefully
wipe excess
glue
onto
the fuselage.
The contact
glue
is now
lelt to dry out overnight,
instead
of being lefl
t0
air-dry
first.
This method
guarantees
a
perfect
joint
between
frame
and
canopy.
Once
the
glue
has set
hard
(at
least
12 hours), cut
the retaining
thread
on
the underside
of the
fuselage, and carelully
pull
it
through under
the canopy.
Press the canopy
onto the
lrame once
more all round,
then
remove the marking
tapes. Check
that the canopy
fits
really well, and
carefully
carry out
any
minor adjustments
needed.
The canopy
latch actuating
pin
can
now be cut down
carefully
to
a
minimum
length. so that
it is less conspicuous.
Aero-tow
coüpling
We recommend
the
Multiplex aero-tow
coupling Order
No.
73
3155
(not
included in the
kit). The
position
0f the release servo
is
shown
0n
the
servo Dlate
9.
lt is essential
that the bowden
cable should
be routed
so
that an
inside hole on
the
servo
output arm
can be used
t0 operate
the release.
A high{orque servo
(at
least
2.0 cm/kp) should
be used.
The
bowden
cable
is held
in
place
with
the
support
1 1. Please follow
the instructions
included
with the aero{ow
coupling.
Tailplane
The
next stage
in
building
the
fuselage
tailplane.
requires
the compleled
Divide
the leading edge
26 in hall, and
glue
one strip
to the tailplane.
Sand
the
leading edge strip
to follow the sweep
of the
panel
on
the
other side,
and
glue
the second
hall ol
the leading edge
in
place.
This
results in a scarf
joint
at the centre.
Round olf
the leading edge as shown
in the drawing
and sand
the ends
flush at
the tips.
Cut the tip block
27 in half, and
glue
the two
tips in
place.
Sand
the tips
to the shape
shown
in the drawing.
Separate
the elevator
by continuing
the milled slot
out through
the
tips. Sand
the
cut
edges of
the the tailplane and
elevator
flush with the
milled edges, using a
long flat sanding
block, to ensure
that the
piv0t
lines are straight.
Seal otf
the rear edge of
the tailplane and
the front edge
ol the elevator
with sealing
strips
25.
Sand
back the edges
of the sealing strips
until
they are tlush,
taking
care to
leave the top edge of
the sealing strip-
later to be the
hinge line
of
the elevator
-
sharp.
There
must be no radius
at this
point,
otherwise
the
elevator
will not be able to
move lreely. Check
that the
elevator
is an accurate
lit against
the tailplane and
sand back
if
necessary.
Sand the
trailing edge down
to a maximum
thickness of
1 m.m.
Cut
the recess
in the elevator to clear
the rudder, as
shown
in the
drawing,
and seal the cut
edges with scrap
balsa. Sand
the sealing
pieces
flush
with the surface of
the elevator.
Canopy
This stage calls
for
neat,
precise
work; the lit of
the canopy
is
a
very
imp0rtant
lactor in
the overall
imression ol the
model.
Please allow
yoursell
the
time to do a
good
job;the
result will be
worth the
trouble.
First
check
that the canopy
lrame
1 is an accurate
fit on the
fuselage
(1
m.m. smaller
all
round than
the luselage
).
Fix the
frame 0n the
fuselage
with strips
0f tape.
Drill the
hole for the
locating dowel
3
centrally
through
the canopy
lrame and
the fuselage
flange,
keeping
the
hole as
lar from
the outside edge
as
possible.
Check
alignment
by
fitting
the dowel
in the hole, then
remove the canopy
frame,
glue
the
dowel
into the canopy
frame, and sand
the exposed
end ol
the dowel
flush.
The canopy
latch
4 is installed
next. Using
a felt-tip
pen,
mark
the
oosition
of the slot
for the actuating
pin
and
file
it out with a small
needle tile, after
drilling
1.5 m.m. 0
pil0t
holes.
Drill a
5 m.m.
0 hole
through the GRP
fuselage
tlange to accept
the
latch. Check
that
the canopy
latch fits, and
open out
the hole
if
necessary.
Roughen
up the
gluing
surlace of
the latch, and
apply a
drop
of oil
to the mechanism.
Fix the
latch in
the luselage
with s-minute epoxy,
then
reinforce
the
joint
with slow-setting
epoxy,
thickened
as described
before.
Take
care
that no
resin can
get
into the
mechanism, and
leave the
luselage
on its back
while
the resin cures.
Retract
the
latch
Din,
and sand
back
the latch body
llush with
the GRP
flange. The
position
of
the retaining
pin
is now translerred
to
the cabin
frame by
placing
the cabin
lrame accurately
on the
fuselage and
pressing
the retaining
pin
against
it. This
will leave a small
mark,
which can
then be drilled
out carefully
to a diameter
of
3 m.m Check
that
the cabin
lrame
is located accurately
when
held in
place
by
the
latch.
Cut
out the
canopy
2
along
the
marked line. The curved-blade
scissors
in the
lrultiplex accessory
range are ideal
for this.
The
canopy
should
now be trimmed
to an exact
fit. lf
you
wish to
paint
the canopy
frame,
this is
your
last opportunity.
The orocedure
which is described
nexl ensures
that the
canopy
fits
really
accurately.
To avoid soiling
the
luselage, rub
wax release agent
into the
tuselage surface
around
the canopy
flange.
lt
can
easily be
polished
off
again once
the
job
is linished.
28
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