Multiplex CARGO Bauanleitung Seite 17

26. Control surface travels
The control surfaces must be set up correctly if the model is
to have a balanced control response.
CARGO control surface travels
The travels are measured at the widest point of the control
surface, and are stated in millimetres.
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RudderRudder
servo
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ElevatorElevator
servo
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Aileron Ailerons
servos
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For a right turn, the right-hand aileron must rise.
During the test programme the motor thrustlines were set up
in such a way that pitch trim changes at different motor speeds
would be as slight as possible, combined with docile all-round
handling.
At full-throttle the model still requires slight down-elevator for
correct pitch trim, and this should be in the region of 10% or
around 1.5 mm. Many radio control systems allow you to set
up pitch trim compensation automatically using a transmitter
mixer. Please refer to your radio control system manual for
details of setting up the mixer.
27. Balancing / setting the Centre of Gravity
To achieve stable flying characteristics your "CARGO" must
balance at a particular point, just like every other aircraft.
Assemble your model completely, ready to fly, and install the
flight battery.
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The CG should be located at the front edge of the forward
spar (approx. 105 mm back from the root leading edge).
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Support the model at this point on two fingertips, and it should
hang level. If necessary, adjust the position of the flight battery
to obtain the correct balance. The convenient MULTIPLEX
CG gauge (Order No. 69 3054) makes this task extremely
easy and accurate. Once the correct CG is established, mark
the battery position in the battery cradle, so that you can be
sure of positioning the battery correctly every time.
The model is capable of limited aerobatics, but if you wish to
test its capability you must provide some extra means of
securing the flight battery in addition to the Velcro tape. Please
remember that this model is only made of styrofoam, and
although it is relatively strong its airframe strength is not
comparable with models of conventional construction.
28. Decorating the model
The kit includes a multi-colour decal sheet 22. Cut out the
individual placards and emblems and apply them to the model
using the scheme shown in the illustrations, or in any
arrangement you like.
29. Preparing the model for the first flight
Wait for a day with calm conditions, or only a very slight
breeze. The evening hours are often the most favourable.
Be sure to carry out a range check before attempting the
first flight:
Charge up the transmitter and flight batteries in the prescribed
manner. Before you switch on the transmitter, ensure that
no other modeller is already using that channel.
30 / 30
left / right
12 / 20
down / up
10 / 20
down / up
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Collapse the transmitter aerial completely, and ask your
assistant to walk away from the model holding the transmitter.
The model should be about 1 m above the ground, either
held in the hand or placed on a wooden table.
Ask your assistant to operate one control function constantly,
while you watch the servos carefully: the non-controlled one
should remain stationary up to a distance of about 80 m, and
the controlled one should follow the transmitter stick
movements smoothly and immediately. This test only gives
valid results if the radio band is clear of interference, and if
no other radio control systems are in use, even on other
channels . Repeat the test with the motors running. The
effective range should not be significantly reduced.
If you are not sure that all is well, do not be tempted to fly the
model. Send the entire system, complete with battery, switch
harness and servos, to the RC system manufacturer's Service
department for checking.
The first flight ...
Hand-glides with the motors switched off do not give
useful results with this model. The CARGO should be hand-
launched (always into the wind), with the motors set to full-
throttle. If you are not a proficient RC pilot, please ask an
experienced modeller to help you in the early stages.
If you have access to a hard (tarmac) strip, the model can
safely be taken off from the ground. If fitted with the optional
geared motors, the model is also capable of taking off from
closely mown grass. To get the model moving initially, open
the throttle slowly, apply full up-elevator to keep the tail down,
and keep the nose heading into wind with rudder / tailwheel
corrections. Open the throttle fully and allow the model to
accelerate further, gradually reducing the up-elevator, and
the tail will rise to the horizontal. When a safe take-off speed
is reached, apply gentle up-elevator to lift off. Set a steady,
shallow rate of climb, and make sure you maintain a safe
airspeed at all times.
Allow the model to climb to a safe altitude, then adjust the
controls using the trim sliders on the transmitter until the
model flies straight ahead "hands off".
At a safe height switch the motors off and fly the model on
the glide to get a "feel" for its control response on the landing
approach. Carry out a series of simulated landing approaches
at a reasonable height, so that you will be prepared for the
landing when the flight pack actually runs out.
Until you are confident of the model's control response, do
not attempt tight turns close to the ground, especially when
you are landing. It is far better to land safely some distance
away, than to force the model back to your feet and in so
doing crash it. It is best to land this model with the motors
running at low speed, rather than on the glide.
30. Dropping a load, e.g. parachutists
Ejecting parachutists or sweets from the CARGO at your
flying site or at an open flying event can provide lots of fun
and make a real change. Small children (and big kids) all
enjoy such shows hugely.
An interesting competition, and one which is very easy and
quick to organise, is to attempt to drop weighted paper tapes
(markers) on a target on the ground. The tapes should be
fitted with a small weight (< 5g) at one end.
The capacity of the loading bay is relatively large, but please
don't be tempted to fit a load of more than 500 g. It is also
important that the sweets should not be dropped directly onto
spectators, cars or other models. A shower of sweets from a
height of 100 m feels like a shower of very heavy hail. They
can also cause dents in cars, and may even cause serious
injury to people!
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