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Notes on operating the CUMULUS XXL
Be sure to read right through the instructions covering assembly and operation of your model
before you attempt to operate it for the first time. You alone are responsible for the safe
operation of your radio-controlled model. Young people under 12 years of age should only be
permitted to build and fly this model under the instruction and supervision of an adult who is
aware of the hazards involved in this activity.
These operating instructions should be stored in a safe place, and must be handed on to the
new owner if you ever dispose of the model. If you have questions or queries about operating
this RC model aircraft safely, please contact your local model shop in the first instance, where
the staff will be pleased to advise you.
Radio-controlled model aircraft are highly demanding and potentially dangerous objects, and
require a high level of specialised knowledge, skill and an awareness of responsibility from the
operator.
In legal terms our models are classed as aircraft, and as such are subject to legal regulations
and restrictions which must be observed. Our brochure "Luftrecht fuer Modellflieger" (Aviation
Law for Modellers) is available under Order No. 8032, and contains a summary of all these
rules. Your local model shop should have a copy which you can read. There are also Post
Office regulations concerning your radio control system, and these must be observed at all
times. Refer to your RC system instructions for more details.
Be sure to use only those parts included in the kit, together with other genuine Graupner
accessories and replacement parts as recommended expressly by us. Even if you change a
single component of the power system you can no longer be sure that the system will work
reliably, and such changes also invalidate your guarantee.
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 aircraft 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.
You alone are responsible for the safe operation of your RC powered glider.
If you have queries concerning safety relating to RC model aircraft, please ask your local
model shop for advice, where the staff will be glad to help.
Adhesives and paints 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 or her 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.
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