Manual Graupner MC 32 HOTT (page 5 of 345) (English)

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Safety notices

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 rst

and then the receiver.

Always switch the receiver off rst

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.

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.

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Graupner MC 32 HOTT Manual

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