Manual Multiplex PROFImc3010 (page 59 of 79) (English)

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You are

sure

to have discovered

by now that

the symbol

"S+"

appears

the display

when

you

move

the stick

between

"HP"

and

"P+".

This is the additional

point

interDosed between

hover and

maximum collective

pitch.

Hold

the stick

that

position

and enter

the

value

vou

think correct.

Exactly

the same

applies on

the

"other

side".

Between

"HP"

and

"lU'

you

will find

"S-".

Hold,the stick

in this

oosition

and enter the correct

value with the

and

keys, or

the Digi-Adjuslor.

Adjusting

the values

in flight

Caution:

never attempt to

make changes

in flight using

the

keypad.

The risk of making a

catastrophic error

too

great!

Always

use

the Digi-Adiustor

for making

in-flight

adiustments.

Yoü don't

really need to concern

yourself

with the details

adjusting

this curve.

you

rotate the Digi-Adjustor

during a

flight,

adjusts

that

part

of the curve

which corresponds

the

position

of the collective

pitch

stick at

that moment

just

when setting up

the curve

the

first

place.

Never-

theless

a few words on

the basic

principles:

The 3-ooint

curve:

When vou

rotate the

knob, the

minimum throttle

posi-

tion, ttie

hover

throttle setting

or the collective

pitch

maximum

setting

will be altered,

depending

on the

position

of the collective

pitch

stick.

The s-ooint

curve:

Here again"

minimum throttle,

the central

part

the

curve,

br the collective

pitch

maximum

setting

altered, depending

the

position

ot the collective

pitch

stick

(the

centre

part

moves the three

points

S-,

S+

"in

parallel").

brief:

Because ot

the

"intelligent"

method adopted

for

throttle

adiustments,

a single adiustor

sufficient

for in-flight adiustments.

This makes operation

much simpler,

and

removes a

whole bundle of stress

from the

pilot.

Now to recap:

you

have two useful

adiustment

facilities:

on the one

hand

you

can

ad,ust the

"throttle

curve"

just

described;

on the

other

you

can

adiust collective

pitch

(the

hover setting) at any

time, using

the collective

oitch trim

slider.

The

"throttle

slider"

The throttle

slider can also

be used to

influence the

throt-

tle setting.

There are two

optional

modes of operation.

Normal

mode of operation

While

you

are

in this mode

oJ operation,

the slider

works

as a

"limiter"

for the

throttle. At any

time the

maximum

throttle

position

limited to the current

posi-

tion of the

throttle slider;

regardless

ot where

your

col-

lective

pitch

stick

is set, and

regardless of

how

you

have

set

uD the

throttle curve.

ln diaorammatic

form:

The throttle

slider

is set to the

value shown

in the dia-

gram

the dotted

line.

you

now set the

collective

pitch

stick

to minimum

and slowly

push

towards

maxi-

mum, the

throttle at

first follows the throttle

curve shown

bv the

doudash

line. From

the

point

which the

two

lines

meet, the throttle

remains constant,

and

follows

the

dotted

line again.

you

now set

the slider to a

lower

point,

so that

its

vaiue

is completely

below the

throttle curve,

then the

curve

has

effect,

and throttle

is controlled

entirely by

the slider.

Practical

application:

Using

the throttle

slider

you

can reduce

throttle

inde-

pendently

of the collective

pitch

position,

or, at

the other

extreme,

release

it again. lf

you

reduce throtlle

greatly

with the slider,

you

will drop below

the speed at

which

the centrifugal

clutch

"bites":

idle with

helicopter

landed".

The whole

thing in

reverse: the helicopter

is on the

ground;

throttle

"closed";

motor at

idle. To take off

push

the throttle and

revs

high

(collective

pitch

mini-

mum): the

"throttle

curve"

takes over,

and

with the

throttle

fully

released the

helicopter can

finally be taken

otf by

increasing collective

pitch.

"Direct

throttle"

mode of operation

In many cases

for example,

tor adiusting

the motor

the throttle

needs to be adjusted

without

any automatic

variation ot collective oitch.

In this case

a switch

used

to disconnect

the coliective

pitchlthrottle

coupling:

this

is termed

"Direct

throttle".

In this mode of operation

the throttle

is adiusted

directly,

using the slider

alone.

As usuä|,

you

have to tell the

transmitter

which switch

vou

want to use to select

"Direct

Throttle".

This is done

ät the

'Adjust

transmitter

controls"

menu, as a

transmit-

ter control

option under

COLLECIIVE

PITCH.

First move

to the

'Adiust

transmitter

controls"

menu,

select

the collEgllvE

PITcH transmitter

control,

press

the

key, and then

leaf through

with the

key

until

you

reach the

Direct

Throttle" option.

rrg db

You will see this:

rE:

t-:uLL.

TLr THF:1

lEF HF:tlTE:

r_rFF

Press

the

key first, lhen switch

with the

key,

and

finally select the switch

you

want to use

with the

and

keys.

Now

you

can switch

between

"throttle

coupled

to col'

lective

pitch"

and

"direct

throttle

control"

by means

the

mechanical switch

you

have

just

selected.

Note:

The

idle

oosition

the throttle slider

switchable

between

"idle

back" and

"idle

forward", as

with fixed-

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Multiplex PROFImc3010 Manual

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