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Sky-Cat
1. Preparation:
Carefully ease the die-cut parts out of
the sheet using a balsa knife if
necessary,
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clean up the edges
with abrasive paper and group them
according to the version you intend to
build.
Assemble the parts "dry" ,
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check that they fit accurately, then glue
them together using white glue or
cyano. For the glow version it is
absolutely essential to fuel-proof the
wooden parts with thin epoxy or paint;
for the electric version this is not
necessary, but still recommended.
2. Motor mount:
When assembling the motor mount
note that the motor thrustline must be
angled to the right, i.e. part 24 must be
fitted on the right-hand side as seen
from the tail, and part 26 on the left.
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Glow version
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Electric version
Prepare the undercarriage mount as
follows: press all the parts out of the die-
cut sheet, trim them to fit and join them
using white glue or epoxy.
The dowels, parts 50, are not fitted until
a later stage. For the glow version it is
absolutely essential to fuel-proof the
wooden parts with thin epoxy or paint;
for the electric version this is not
necessary, but still recommended.
The next step is to release the elevators
attached to the tailplane 02, so that
they can hinge up and down. Do this
by making a careful cut with a fine-
tooth saw at right-angles to the hinge
line. Install the joiner strip 41 and the
elevator horn 82. Be sure to use hot-
melt glue and a glue gun for these
joints. Apply the adhesive sparingly and
join the parts immediately.
3. Preparing the fin and rudder:
Cut slots for the hinges 83 using a balsa
knife and glue the hinges in place using
hot-melt glue. Assemble the tailwheel
unit from parts 64, 66, 81 and 85, and
glue it in the rudder together with the
horn 82 and parts 32.
4. Completing the fuselage:
Screw the screw-hook 86 into the
wooden dowel 50 and glue the dowel
in the fuselage. Cut the RC cradle 10 to
size and trim it to fit, then fix it in place
with hot-melt glue (be sparing with the
glue to avoid warping the plastic
cradle). Extend the servo cables using
filter leads, and place them in the
fuselage. You may wish to secure the
cable ends with adhesive tape so that
they don't get in the way as
construction proceeds. Wrap each servo
in a piece of heat-shrink sleeving or
adhesive tape, and glue them in place
using hot-melt adhesive. Install the
wooden strip 40 to reinforce the tail end
of the fuselage. Glue the prepared
undercarriage mount in place together
with the wooden dowels 50.
5. Installing the fin and tailplane
Glue the prepared fin and tailplane to
the fuselage, and fit the rear turtle-deck
at the same time. Install the plastic
sleeve 70 as shown; the receiver aerial
runs through this and is fixed to the fin
with a rubber band.
6. Preparing the wing 01
Release the ailerons by slitting with a
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fine-tooth saw and carefully deflect
them to and fro until they move freely.
Wrap each aileron servo in a piece of
heat-shrink sleeving and glue them in
place using hot-melt adhesive. Thread
the servo leads into the fuselage. Check
wing alignment by measuring, and
mark the correct position. When you are
confident that everything fits correctly,
apply hot-melt glue to the fuselage /
wing joint, and immediately fit the wing
in the previously marked position. Hold
the parts exactly in this position until
the glue has set hard.
7. Control surface linkages
All four control surfaces are actuated
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using the same system, as shown in Fig.
11. Connect the pre-formed end of the
pushrod to the servo output arm. Screw
the pushrod connector to the large hole
in the control surface horn, and secure
the nut with a drop of paint or similar.
Connect the control surfaces in such a
way that the full servo travel can be
exploited. The control surface travels are
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stated in the section entitled "Settings" .
8. Installing the motor mount
You have already decided whether you
are building the electric or glow version
by assembling the appropriate motor
mount. The motor mount can now be
glued in place. Electric version: install
the geared motor, connect the speed
controller and carry out a test run. When
you are sure that everything is correct,
glue the "fueltank cover" 03 in place.
This is essential to provide adequate
structural strength.
Glow version: prepare and install the
fueltank (a suitable tank is available
under #72 4144). Drill an additional hole
in the fueltank cover for the fueltank
pressure line. Run the pressure line
through the hole and connect it to the
pressure nipple on the silencer. Wrap
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the tank in a thin layer of foam rubber
(to avoid the fuel foaming), and then
glue the tank cover in place. This is es-
sential to provide adequate structural
strength.
9. Installing the receiving system
In the electric version the receiver
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battery and receiver are installed under
the rear turtle deck, and secured using
Velcro (hook-and-loop) tape. If your
speed
controller
adequately rated BEC system you may
be able to manage without the receiver
battery.
Be careful! In this case there must be
no hint of stalled servos, and the control
surfaces must move freely.
For the glow version you will also need
a throttle servo. Wrap this servo in a
heat-shrink sleeve and fix it to the
battery cradle using cyano, with the
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pushrod running forward to the motor.
Glue the snake outer to the motor
bulkhead and the fuselage side about
3 cm forward of the servo using a few
drops of glue.
You can adjust the Centre of Gravity
(CG) to suit the weight of the motor you
have installed by re-positioning the
receiver battery. There are three
possible positions: 1. behind the
fueltank, 2. behind the throttle servo, or
3. behind the receiver. Glow version:
pack the receiver in foam rubber and
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install it under the rear turtle deck.
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includes
an
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