GRAUPNER MC-32 Manual page 5

equipment. Under no circumstances may a servo
cable be wrapped around the antenna or routed close
to it.
Make sure that cables near the antenna cannot move
about during flight.
Routing the receiver's antennas
The receiver and its antennas must be positioned
as far away as possible from drives of any kind. If
the model's hull is made of carbon fiber material, the
ends of the antennas must extend outside of the hull.
If your model features a carbon fibre fuselage, the
aerial tips must always extend outside the fuselage
for a length of at least 35 mm. If this is not possi-
ble, it is essential to substitute longer aerials for the
standard ones (approx. 145 mm long) fitted to HoTT
receiver(s).
The orientation of the aerial(s) is not critical, but
it is advantageous to install one receiver aerial in
a vertical – upright – position in the model. If your
receiver is a Diversity type – two aerials – the active
tip of the second aerial should be positioned at 90 °
to the tip of the first aerial, and ideally the distance
between the two tips should be greater than 125 mm.
Servo installation
Always mount servos with the provided rubber vibra-
tion-damper parts, see "installation notes" on page
54. Only in this manner can these parts be pro-
tected against excessively hard vibrations.
Installing control rods
Control rods must be installed such that they operate
freely and smoothly. It is particularly important that
all rudder levers are able to move to their full limits,
i.e. not otherwise mechanically blocked.
In order to be able to stop a running motor at any
time, control rods must be adjusted such that the
carburettor tap is completely closed when the joystick
and trim lever are brought into their end idle position.
Pay attention that no metal parts, e. g. as a result of
rudder actuation, vibration, rotating parts, etc., rub
against one another. Metal-to-metal contact causes
electrical "noise" which can interfere with the correct
operation of the receiver.
Transmitter antenna orientation
Transmission field strength is minimal in an imaginary
line extending straight out from the end of the trans-
mitter's antenna. This means that "pointing" the trans-
mitter's antenna directly toward the model will not
produce good reception but rather degrade reception.
When multiple remote controls are operating simulta-
neously, pilots should position themselves in a loose
group. Pilots standing off to themselves not only en-
danger their own models but those of others as well.
However, when 2 or more pilots using 2.4 GHz remote
control systems are closer than 5 m to one another
this can lead to return channel overdrive which, in
turn, will trigger a range warning much too early.
Increase your distance between one another until the
range warning ceases.
Pre-start checks
Before switching the receiver on, be sure the throttle
control is at its Stop/Idle position.
Always switch the transmitter on first
and then the receiver.
Always switch the receiver off first
and then the transmitter.
If this sequence is not maintained, such that the
receiver is still switched on when the corresponding
transmitter is switched to "OFF", then the receiver
may respond to other transmitters or general radio
frequency noise. This can cause the model to execute
uncontrolled operations that may cause personal
injuries and/or property damage.
In particular, for models equipped with a mechanical
gyro:
before switching off the receiver, disconnect the
model's power supply to prevent the motor from rev-
ving up unintentionally.
The residual spin of a gyro often produces
so much voltage that the receiver may
falsely interpret a throttle signal! This will
then cause the motor to start up unexpect-
edly.
WARNING:
If this order is not respected, that the receiver
is turned on, but the corresponding transmit-
ter is "OFF", the receiver could respond by
other transmitters and any interference.
The model can be run as a result uncontrolled steer-
ing movements, thus possibly causing property dam-
age and / or personal injury.
In particular with a mechanical gyro for models:
Before you switch your receiver off, make sure by
interrupting the power supply, that the motor can not
run up unintentionally.
An expiring gyro can generate such a voltage that
the receiver picks up as an apparently valid throt-
tle command. Then, the motor may start uninten-
tionally!
Range test and function test
Perform checks for proper operation and
range before every session. Secure the mod-
el adequately in place and ensure that no one
is in front of the model.
Perform a complete functional test on the ground and
execute a complete simulated flight to exclude the
possibility of system faults or problems with the mod-
el's programming. When doing this, be sure to follow
the notices provided on pages 88 and 99.
Never operate the transmitter in Model mode, i.e.
for flying or driving, without an antenna. Be sure the
antenna is firmly seated in its socket.
Safety notices 5