Multiplex SKY-CAT Notice De Construction page 10

10. Motor cowl and canopy
Trim the canopy to fit neatly on the
canopy frame; the ideal tool for
trimming is a pair of curved scissors. You
may wish to decorate the interior of the
cabin in your choice of colour scheme
before gluing the canopy in place. A
"head and shoulders" pilot can also be
fitted.
The cabin is held to the fuselage by
means of a rubber band fitted to the
canopy frame and the hook / dowel
already fitted to the fuselage (see
overall view). Prepare the motor cowl by
cutting the openings required to suit
the glow or electric version, and the
motor you have installed. The cowl is
held in place with screws at the top and
the front.
11. Undercarriage
Fix the undercarriage in place using the
screws 91, as shown in the illustrations.
12. Final assembly, settings
Check all glued joints and all the
linkages one last time. The CG should
be within the range 100 - 110 mm aft
of the wing root leading edge. Adjust
the battery position to achieve this, or
add lead ballast if necessary. The correct
motor thrustline is built into the motor
mount, but you may find that test flying
shows the need for fine adjustments.
Always measure the control surface
travels at the widest point of the control
surface:
Ailerons 22 mm up
18 mm down
Snap flaps
(opposite direction to elevator)
+/- 10 mm, switchable
Elevator 18 mm up
10 mm down
Rudder 30 mm left
30 mm right
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First flight ...
Do not attempt to test-glide this
model!
The model should be launched at full-
throttle, either from the ground or from
your hand. Always launch straight into
wind.
For the first flight we recommend
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that you ask a friend to launch for
you.
For a ground take-off allow the model
to pick up speed slowly, holding full up-
elevator all the time, and correct the
tracking with the rudder / tailwheel.
Allow the model to accelerate further
at full-throttle, then gradually return
the elevator to neutral so that the tail
rises to the horizontal. When the model
has reached lift-off speed apply up-
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elevator deliberately to take off. Use the
elevator to produce a shallow climb,
maintaining good speed all the while.
When you reach a safe height, adjust
the transmitter trims as necessary so
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that the model flies dead straight
"hands off" .
At an adequate altitude check how the
model responds when the motor is
switched off or throttled right back.
Carry out a simulated landing approach
at height so that you are prepared for
the model's handling when the flight
pack runs down or the glow motor cuts.
In the initial phase don't attempt to fly
tight turns at low altitude, especially on
the landing approach. It is always better
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to land safely even if it means having
to walk some way to retrieve the model,
than to risk a crash by landing at your
feet. It is best to land the model with
the motor running at a high idle speed.
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Safety
Safety is the First Commandment when
flying any model aircraft. Third party
insurance should be considered a basic
essential. If you join a model club
suitable cover will usually be available
through the organisation. It is your
personal responsibility to ensure that
your insurance is adequate (i.e. that it
covers powered model aircraft).
Make it your job to keep your models
and your radio control system in perfect
order at all times. Check the correct
charging procedure
rechargeable batteries you are using.
Make use of all sensible safety systems
and precautions which are advised for
your system. An excellent source of
practical accessories is the MULTIPLEX
main catalogue, as our products are
designed and manufactured
exclusively by practising modellers for
other practising modellers.
Always fly with a responsible attitude.
You may think that flying low over other
people's heads is proof of your piloting
skill; others know better. The real expert
does not need to prove himself in such
childish ways. Let other pilots know that
this is what you think too, as it's in all
our interests. Always fly in such a way
that you do not endanger yourself or
others. Bear in mind that even the best
RC system in the world is subject to
outside interference. No matter how
many years of accident-free flying you
have under your belt, you have no idea
what will happen in the next minute.
We - the MULTIPLEX team - hope you
have many hours of pleasure building
and flying your new model.
MULTIPLEX Modelltechnik
for the