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Use only matching polarised connectors. All high-current cables and connectors must be insulated
carefully to eliminate the risk of short-circuit; this also includes the flight battery if you assemble the
pack yourself. Never combine plugs and sockets of different types, e.g. gold-contact with tin-contact,
as such connections are never reliable in the long-term.
If you are using a motor switch or speed controller with an integral receiver power supply (BEC
system), be sure to use only Graupner gold-contact connectors.
Avoid short circuits and reverse polarity at all times.
The high energy density of NC batteries involves a permanent danger of fire and even explosion.
A radio-controlled model aircraft can only work properly and fulfil your expectations if it is built very
carefully and in accordance with the building instructions. If you wish to avoid injuring people and
damaging property it is essential to be careful and painstaking at all stages of building and operating
your model. Nobody would climb into a full-size sailplane and try to fly it without completing a
course of training first. Model flying is just such a skill, and has to be learned in exactly the same
way.
However, as manufacturers we have no means of influencing the way you build and operate your RC
model aircraft, and for this reason we can do no more than point out the hazards expressly. We
accept no further liability.
If you need help, please enlist the aid of an experienced modeller, join a model club or enrol at a
model flying training school. Model shops and the specialist model press are also good sources of
information. The best course is always to join a club and fly at the approved model flying site.
Adhesives contain solvents which may be hazardous to health under certain circumstances. Read
and observe the notes and warnings supplied by the manufacturer of these materials.
The operator of the model must be in full possession of his bodily and mental faculties. As with car
driving, operating a model aircraft under the influence of alcohol or drugs is highly dangerous and
not permissible under any circumstances.
Make sure that all passers-by and onlookers are aware of the hazards involved in the operation of
your model. Remind them to keep a safe distance from the model, i.e. at least 5 m behind the
rotational plane of the propeller.
Keep a safe distance between your model and other people or objects. Never fly low over people or
directly towards them.
Radio-controlled models should only be flown in temperatures within the range -5° to +35°C. More
extreme temperatures can lead to changes in battery capacity, material characteristics, the strength
of glued joints and other unwanted effects.
All model flyers should behave in such a way that the danger to people and property is minimised.
Never act in any way which will disturb other flyers or prevent safe, orderly flying at the site.
Don’t operate your model in the vicinity of overhead power cables, industrial sites, residential areas,
public roads, squares, school playgrounds or sports fields etc.
Pre-flight checks
Before every session be sure to carry out a range check. This is the procedure: switch on the
transmitter, followed by the receiver. Leave the transmitter aerial collapsed, and walk away from the
model. At a reasonable ground range check that all the control surfaces still work perfectly when you
move the sticks.
Repeat the check with the motor running, while a friend holds the model securely.
The first time you fly any new model aircraft we strongly recommend that you enlist the help of an
experienced modeller to help you check the model, and offer advice while you are flying.
Don’t ignore our warnings. They refer to hazardous materials and processes which, if ignored, can
result in fatal injury or serious damage to property.