Manual Graupner MC16 (page 97 of 104) (English)

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Supplementary Information

Supplement 97

Use of the Remote Control System

Treat your remote control equipment

carefully to ensure that it is always reliable

and ready for use.

Switch on the transmitter first, only then

switch on the receiver.

Switch off the receiver first and only then

switch off the transmitter.

If this sequence is not observed, i.e. the

receiver is switched on first with transmitter

switched off, the receiver can affected by

other signals and unpredictable results can

occur. The servos may jitter applying a

high load to the battery and cause it to

discharge quicker than expected.

If you notice the movement of the servos

becoming slower, the receiver battery is

discharging and it should charged or a new

battery fitted.

Extended the transmitter antenna fully

before commencing to fly.

In the direction the antenna points only a

small field strength is generated. It is

therefore wrong to point the antenna

towards the model for best reception.

With simultaneous use of remote control

sets on adjacent channels the pilots should

stand together in a loose group.

Plots not standing in the group endanger

both their and other models

Polarised Connectors

The plugs of the servos and the power

supplies are polarized can be inserted into

the receiver one way round. This is

achieved by one side having a bevelled

edge and the receiver sockets being

shaped accordingly

Installation of Receivers

The receiver be mounted in foam rubber to

protect it from impacts. It should also be

fitted behind a strong frame and/or in

vehicles or ship models protected from

dust and water splashes

The receiver should not be fitted directly

the fuselage, chassis or hull, since

otherwise engine vibrations, impacts or

landing shocks will transfer directly to it.

The receiver should be installed in such a

way that the antenna, servo and power

leads are not under tensions or otherwise

stressed.

Receiver Antenna

The receiver antenna is connected directly

to the case. The length is approx. 100 cm.

The antenna should be routed as straight

as possible and as far from electric motors,

servos, metallic linkages or power cables.

For flying models the antenna should be

routed out of the fuselage by the shortest

possible route and attached to the vertical

fin (you should use some strain relief!).

If the antenna should be longer than the

distance to the vertical fin, let it continue as

trailing antenna or route it to the wing tip

edge of the horizontal stabilise. Each such

bend in the antenna brings a loss of range.

With ships the position of the receiver

should be such that the receiver and the

antenna as far from drive electric motors,

power cables and metal parts.

A blade antenna with a free length or 80 –

100 cm is preferred for ship models over

every other antenna type.

With model cars, blade antennas work

satisfactorily. Here shortened antennas

can be used as the operating range is

relatively short.

Power Supply

The power supply for the receiver comes

from a rechargeable NiCd 4.8V battery

(see page 5 or the main GRAUPNER

catalogue). The battery should be wrapped

in foam and securely mounted to a strong

frame. The cables should be loosely routed

making sure that they remain so during

any movement of the battery.

The battery can be connected directly to

the receiver or by a switch harness.

Examination before Starting

You should check for correct function and

range before each use. Switch on the

transmitter then the receiver. Remove the

transmitter antenna. Check at an

appropriate distance from the model that

all the controls function perfectly and

move in the correct direction.

This check should also be done motor

running (an assistant can hold the model.

Installation of Control Linkages

The installation should be done so that the

linkages run freely and are low-friction.

Linkages and controls that are difficult to

operate absorb battery power, reduce the

actual working time and unfavourably

affect the control position accuracy.

Particularly important is that all control

horns can move through their full travel

and are not mechanically limited. Taking

account of these criteria, the linkages and

hinges in the model should be checked. Of

particular importance is the motor throttle

linkage. The "full power" position must be

determined by the stick position and

definitely not by the mechanical limits of

carburettor. As the model maybe at full

throttle for considerable periods the

additional drain of a stalled servo would

discharge the battery faster than expected.

Likewise the idle setting must be achieved

by the stick position and not mechanically

by limits of the carburettor.

Suppression of Electric Motors

Even high quality electric motors produce

sparks at the interface between the

brushes and the commutator. Depending

on the electric motor, these sparks can

cause interference with the radio signal.

Therefore, in models with electric drive, the

motor must be carefully suppressed. Radio

noise filter suppressors reduce these

malfunctions to a great extent and are

allow the radio system to operate normally.

Radio noise filters are to be installed as

close as possible to the motor (see figure).

Each electric motor should be fitted with

it’s own radio noise filter. When using

suppression filters consideration should be

made of the manual of the respective

electric motor. Interference suppression

should be checked before use of the

model, to ensure sufficient range between

transmitter and receiver is available.

Suppression Filter

Part No. 3361 18A

Part No. 3362 36A

Pre-built Units. Simply soldered between

the electric motor and the power cables

(see figure). The range of the remote

control system is better when using optimal

interference suppression and the safety of

operation of the model is increased.

The filter absorbs the noise spikes created

by electric motors and therefore protects

electronic speed controllers.

Electric RC car models with mechanical

speed controllers have only basic filtering

from the factory. When subsequently fitting

an electronic speed controller the motor

must then be adequately suppressed.

Servo Extension Lead Suppression.

Part No. 1040

A servo lead suppression is needed when

using long servo leads as the filters in the

receiver are insufficient. A filter should be

fitted next to the receiver. In critical cases

a second filter at the servo can be fitted.

Length approx. 200 mm, weight approx. 3g

Servo Plug

Servo plugs are removed from the receiver

socket by pulling about 5-10 cm away from

the plug inline with the pin connections.

Battery Capacity & Period of Use

This applies to all battery source: At low

temperatures the capacity decreases

considerably, therefore the periods of use

in cold weather are shorter. The available

battery power must be checked more

frequently.

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