Safety notes
5
Safety notes
Disconnect all batteries and remove them from your mo-
del if you know you will not be using it in the near future.
Capacity and operating times
This rule applies to all forms of electrical power source:
battery capacity is reduced every time you charge it.
At low temperatures capacity is greatly reduced, i.e.
operating times are shorter in cold conditions.
Frequent charging, and / or the use of maintenance
programs, tends to cause a gradual reduction in battery
capacity. We recommend that you check the capacity of
all your rechargeable batteries at least every six months,
and replace them if their performance has fallen off
significantly.
Use only genuine GRAUPNER rechargeable batteries!
Suppressing electric motors
All conventional electric motors produce sparks between
commutator and brushes to a greater or lesser extent
depending on the motor type; the sparking generates
serious interference to the radio control system. In
electric-powered models every motor must therefore be
effectively suppressed.
Suppressor filters effectively eliminate such interference,
and should always be fitted. Please read the notes and
recommendations supplied by the motor manufacturer.
Refer to the main GRAUPNER FS catalogue for more
information on suppressor filters.
Servo suppressor filter for extension leads
Order No. 1040
Servo suppressor filters are required if you are obliged
to use long servo extension leads, as they eliminate the
danger of de-tuning the receiver. The filter is connected
directly to the receiver input.
In very difficult cases a second filter can be used, positi-
oned close to the servo.
Using electronic speed controllers
Electronic speed controllers must be chosen to suit the
size of electric motor which they will 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 wreck 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.
Caution:
Radio control systems may only be operated on the
frequency bands and spot frequencies approved in each
EU country. You will find information on frequencies in
the section entitled „Approved operating frequencies“.
It is prohibited to operate radio control systems on any
other frequency, and such misuse will be punished by
the relevant authorities.
Static charges
Lightning causes magnetic shock waves which can
interfere with the operation of a radio control transmit-
ter even if the thunderstorm actually occurs several
kilometres away. For this reason cease flying opera-
tions immediately when you notice an electrical storm
approaching.
Static charges through the transmitter aerial can be
life-threatening!
Care and maintenance
Don’t use cleaning agents, petrol, water or other
solvents to clean this equipment. If the case, the aerial
etc. gets dirty, simply wipe the surfaces clean with a soft
dry cloth.
Liability exclusion / Compensation
As manufacturers, we at GRAUPNER are not in a positi-
on to influence the way you install, operate and maintain
the radio control system components. For this reason
we are obliged to refute all liability for loss, damage
or costs which are incurred due to the incompetent or
incorrect use and operation of our products, or which
are connected with such operation in any way.
Unless otherwise prescribed by law, the obligation of the
GRAUPNER company to pay compensation is limited
to the invoice value of that quantity of GRAUPNER
products which was immediately and directly involved in
the event in which the damage occurred. This does not
apply if GRAUPNER is found to be subject to unlimited
liability according to binding legal regulation on account
of deliberate or gross negligence.
