Manual Multiplex ROYALevo12 (page 6 of 57) (English)

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Instructions

Page 61

3.2. Range checking

Range checking gives reliable information about the

working condition of your radio control system.

Based on our experience and measurements we have

designed a test formula which will always keep you on

the safe side.

1. Set the transmitter

aerial in an upright,

slightly angled position

and then collapse all

the sections together.

2. Set up the model so

that the tip of the re-

ceiver aerial is about 1

m above the ground.

3. Ensure that there are

no large metallic ob-

jects (e.g. cars, wire

fences etc.) in the vicin-

ity of the model.

4. Carry out the test only

if there are no other

transmitters switched

on - even if they are on

different channels.

5. Switch on the transmitter and receiving system. At

a range of about 80 m between transmitter and

model check that the control surfaces still respond

immediately and definitely to stick deflections,

without carrying out any unwanted movements.

When close to the range limit the servo output

arms will start to jitter; they should not move by

more than the width of the output arm.

6. Secure the model and repeat the test with the

power system running (alternating the throttle set-

ting between idle and full-throttle).

The stated range of 80 m is only an approximate guide-

line, as the actual range will vary very greatly according

to ambient conditions. For example, effective range

may only be half the stated value at a mountain bowl

site, or close to a public radio transmitter, radar station

or similar.

What can you do to establish the cause of insufficient

range?

1. Change the position of the receiver aerial. If it is

close to metal parts or model components rein-

forced with carbon fibre, the receiver may suffer

adverse effects.

The influence of electric power systems and igni-

tion systems also varies if you alter the position of

the aerial.

2. Disconnect the servos from the receiver one by one,

and repeat the check. Connecting leads of exces-

sive length without suppressor filters have an ad-

verse effect on reception conditions. Remember

that servos deteriorate with age, and then generate

more interference than when new (brush sparking,

suppressor capacitors adrift from motor terminals

etc.).

If you are unable to effect an improvement, try remov-

ing the complete system from the model and checking

the equipment on its own. This enables you to deter-

mine whether the fault is in the system, or in the instal-

lation conditions in the model.

Pre-flight checks:

• Charge the transmitter, receiver and flight batteries

carefully, and check their state of charge before and

during the session. This means using the correct

type of charger, and a charge process which is suit-

able for the battery type in use. It also involves

regular care and maintenance of the packs (balanc-

ing by a slow charge), and testing the voltage curve

and capacity.

• At the flying site the first step should always be to

check with the other modellers present whether

your own channel (transmitter frequency) is vacant.

If there is a site manager or flight director present,

the method of frequency control in use. Do not

switch ON until you have done this, otherwise there

is a danger of channel clashes and wrecked models.

• Check the range with the transmitter aerial col-

lapsed.

• Ensure that you have selected the right model

memory.

• Check that all primary and secondary control sys-

tems are working perfectly, and that the control

surfaces are deflecting in the right “sense” (direc-

tion).

! If you detect any irregularity or problem, abort

the flight. Seek out the cause of the error, elimi-

nate it, then check everything again.

When operating your model:

• If you have little or no experience flying radio-

controlled models, it makes sense to ask an experi-

enced model pilot to help you initially. The use of a

Teacher/Pupil (Trainer) system is strongly recom-

mended, especially for the initial phase of learning

to fly.

• Operate the model only at suitable approved sites.

• Never fly or run your model directly towards or over

spectators.

• Don’t carry out risky manoeuvres when flying or

operating your model.

• Have a clear idea of your abilities and skill; don’t

over-estimate what you can do!

• If you detect any sign of problems or interference,

land the model immediately and carry out a thor-

ough check.

• Caution: static charges!

When the air is extremely dry (in mountainous ter-

rain, in mountain bowls, close to weather fronts)

static charges tend to build up in the transmitter

and/or the pilot. The charge eventually dissipates

through a static spark, which can endanger the pi-

lot or cause interference to the transmitter.

Counter-measures:

When you feel “static”, cease operations as soon as

you possibly can, and walk a little way down the

mountain to reach a less exposed position.

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