Operation Manual

11. Installing the receiving system in the model

Fig. VI shows the optimum arrangement of the receiving system components in the

model. As far as possible you should consider and work out the position of the re-

ceiving system components in the model even before you start building.

The following points are particularly important:

• Keep the receiver as far away as possible from

- electric motors

- electrical ignition systems

- servos

- batteries

- cables (especially leads carrying high currents).

• Deploy the receiver aerial in as straight a line as possible, and run it out of the

model by the most direct route

(e.g. tension it to the fin with a rubber band).

• Do not shorten/extend the aerial, and don’t leave it coiled up inside the model.

• Do not deploy the aerial inside a model component, or stick it on top of a

model component, which is reinforced with carbon fibre (signal shielding).

• Protect the receiver from vibration. Pack it in foam and stow it loosely in the

model.

If your model has an electric power system, we recommend that you install the

receiving system as shown in Fig. VI. Keep the distance between the receiving sys-

tem and the power system as great as possible, as the currents are high and can

produce serious interference. Ensure that all electric motors are effectively sup-

pressed.

Before the first flight carry out a particularly thorough range check (see 12.2.:

range testing) with the motor stopped and with the motor running.

If you are obliged to fit servo extension leads in the model

, the long cables will

have an effect on the reception conditions inside the airframe. If the length of any

servo lead is greater than 60 cm, a separation filter must be used at the receiver.

Separation filters may also be required to eliminate interference where servo leads

run parallel to each other over a distance of 25 cm or more. Your local model shop

or the MULTIPLEX Service Dept. will provide information on what you need (see

12.5.: What should I do if I have queries or problems?)

12. The system in use

12.1. Post Office regulations for the U.K.

Radio controlled models are of two types - those which operate on the ground or

on water, known as „surface“ models, and those which operate in the air. The first

group includes model cars, trucks and buggies, and also model boats of all types.

The second encompasses fixed-wing model aircraft and rotary-wing machines

(mainly helicopters).