ROBBE Futaba R 6007 SP Bedienungsanleitung Seite 14

Tips on installing 2.4 GHz receivers and aerials
Over the years, RC users gather their own experi-
ence in the installation and use of RC components.
2.4 GHz technology has ushered in a new epoch,
which brings enormous advantages. At the same
time this new equipment is different in nature from
previous technology, and we need to adopt appro-
priate measures when installing and operating a
2.4 GHz system.
One of the most common mistakes is to wrap the
receiver in foam or fit it in a foam tube as we have
always done with 35 MHz receivers, in order to
protect the unit from vibration. This is not neces-
sary with 2.4 GHz FASST receivers, as they do
not contain ceramic filters, and are therefore not
vulnerable to vibration in the same way. This "well
meant" measure is actually counter-productive, as
2.4 GHz receivers contain high-performance ICs
with a fairly high current drain, and this results in
heat generation. Wrapping the receiver in foam
prevents waste heat being dissipated from the
receiver. We recommend that you install 2.4 GHz
receivers using double-sided foam tape (or Vel-
cro tape). If possible the tape mounting should
not cover the full area of the case; it is better to fit
tape "feet", so that air can circulate freely around
and under the receiver. Installing the receiver ver-
tically also enhances air circulation. The tempera-
ture range for radio control system components
is generally stated as -15°C ... +55°C: this is the
typical range, which is stated by manufacturers of
electronic components. This temperature range
applies to virtually all electronic apparatus used in
our daily lives.
4
Operating instructions R6007 SP 2.4 GHz receiver
The same range (-15 ... +55°C) also applies to RC
system receivers, has done for many years, and
is equally applicable to the new generation of 2.4
GHz FASST receivers. For other 2.4 GHz systems
this temperature range is significant because they
employ ICs developed for WLAN applications;
these are generally operated under normal conditi-
ons, and their temperature limits are therefore the
same. Of course, the stated maximum is a theore-
tical 'safe' limit, and in practice these receivers can
cope with considerably higher ambient temperatu-
res (approx. 70 - 75°C). Nevertheless, manufactu-
ring tolerances mean that the component manuf-
acturers cannot guarantee higher values.
For these reasons we recommend that you handle
your 2.4 GHz equipment with appropriate caution,
and in particular observe the following points:
• The use of two LiPo cells without voltage
reduction is not recommended.
• Voltage converters used with LiPo cells gene-
rate their own waste heat, and should not be
positioned in the same compartment as the
receiver, or too close to it.
• On hot, sunny days you should not leave
models in the car, to avoid the model and elec-
tronics becoming too hot.
• Provide effective ventilation, or - even better -
take the model out of the car, and park it in the
shade of the vehicle.
• If your model is fitted with a clear canopy, or
one painted a light colour, the sun shining
through the canopy can heat up the fuselage
and RC components. You can avoid this pro-
blem by removing the canopy to ensure good
air circulation in the fuselage, or by covering
the area with a light-coloured cloth.
• Cover dark-coloured models with a cloth, or
park them in shade.
• Never leave slim / black CFRP / GRP fusela-
ges containing a receiver in the car or in bright
sunlight.
• Do not install the receiver close to a motor and
/ or exhaust system, as the radiated heat may
cause the receiver to overheat.
• Silencers installed inside fuselages should be
partitioned off using balsa panels or similar
to avoid heat transfer and prevent excessive
temperatures in the fuselage.
• Take measures to ensure that air can circulate
through the fuselage.
• You may wish to cut ventilation openings in the
canopy or fuselage.
Supplementary notes regarding additional RC
components
Although receivers are a special case, most other
electronic components will also benefit from the
measures suggested above.
• Speed controller heat-sinks, which are already
warm or hot, are not so efficient at dissipating
heat, and this may result in components over-
heating in use.
• At temperatures of about 45°C and above,
LiPo batteries have a much worse energy yield
(approx. 10 - 12%), which in turn will have an
adverse effect on your model's performance.
• Servos also lose a proportion of their power
when hot: the higher the temperature of the
motor winding, the worse its efficiency.
This means that the power of a servo may
be reduced by up to 20% at temperatures of
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