GRAUPNER mx-20 HoTT Bedienungsanleitung Seite 10

Suppressing electric motors
All conventional (brushed) electric motors generate sparks between the commutator and the brushes, which cause more or less
serious interference to the radio
control system, depending on the type of motor. If an RC system is to work correctly, it is therefore important to suppress the
electric motors, and in electric-powered models it is essential that every motor should be effectively suppressed. Suppressor fi
lters reliably eliminate such interference, and should always be fi tted where possible.
Please read the notes and recommendations supplied by the motor manufacturer. Refer to the main Graupner FS catalogue or
the Internet website at www.graupner.de for more information on suppressor fi lters.
Servo suppressor fi lter for extension leads Order No. 1040
Servo suppressor fi lters are required if you are obliged to use long servo extension leads, as they eliminate the danger of de-
tuning the receiver. The fi lter is connected directly to the receiver input. In very diffi cult cases a second fi lter can be used,
positioned close to the servo.
Using electronic speed controllers
The basic rule is that the electronic speed controller must be chosen to suit the size of the electric motor it is required to control.
There is always a danger of overloading and possibly damaging the speed controller, but you can avoid this by ensuring that
the controller's current-handling capacity is at least half the motor's maximum stall current. Particular care is called for if you are
using a "hot" (i. e. upgrade) motor, as any low-turn motor (small number of turns on the winding) can draw many times its nominal
current when stalled, and the high current will then burn out the speed controller.
Electrical ignition systems
Ignition systems for internal combustion engines can also produce interference, which has an adverse effect on the working of
the radio control system. Electrical ignition systems should always be powered by a separate battery – not the receiver battery.
Be sure to use effectively suppressed spark plugs and plug caps, and shielded ignition leads. Keep the receiving system an
adequate distance away from the ignition system.
Static charges
Lightning causes magnetic shock waves which can interfere with the operation of a radio control transmitter even if the thun-
derstorm actually occurs several kilometres away. For this reason cease fl ying operations immediately if you notice an
electrical storm approaching. Static charges through the transmitter aerial can be life-threatening!
Caution
• In order to fulfi l the FCC RF radiation regulations applicable to mobile transmitting apparatus, the equipment's aerial must
be at least 20 cm from any person when the system is in use. We therefore do not recommend using the equipment at a closer
range than 20 cm.
• Ensure that no other transmitter is closer than 20 cm from your equipment, in order to avoid adverse effects on the system's
electrical characteristics and radiation pattern.
• The radio control system should not be operated until the Country setting has been set correctly at the transmitter. This is
essential in order to fulfi l the requirements of various directives - FCC, ETSI, CE etc. Please refer to the instructions for your
particular transmitter and receiver for details of this procedure.
• Check all working systems and carry out at least one full range check on the ground before every fl ight, in order to show up
any errors in the system and the model's programming.
• Never make any changes to the programming of the transmitter or receiver whilst operating a model.
Care and maintenance
Don't use cleaning agents, petrol, water or other solvents to clean your equipment. If the case, the aerial etc. gets dirty, simply
wipe the surfaces clean with a soft dry cloth.
Components and accessories
As manufacturers, the company of Graupner GmbH & Co. KG recommends the exclusive use of components and accessories
which have been tested by Graupner and approved for their capability, function and safety. If you observe this rule, Graupner
accepts responsibility for the product. Graupner cannot accept liability for non-approved components or accessories
made by other manufacturers. It is not possible for Graupner to assess every individual item manufactured by other
companies, so we are unable to state whether such parts can be used without incurring a safety risk.
Liability exclusion / Compensation
It is not possible for Graupner to ensure that the user observes the installation and operation instructions, and the recommen-
ded conditions and methods when installing, operating, using and maintaining the radio control components. For this reason
Graupner denies all liability for loss, damages or costs which arise through misuse or mishandling of this equipment, or are
connected with such use in any way. Unless obliged by law, Graupner's obligation to pay compensation, regardless of the legal
argument employed, is limited to the invoice value of that quantity of Graupner products which were immediately involved in
the event in which the damage occurred, unless the company is deemed to have unlimited liability on account of deliberate or
gross negligence.