Bedienungsanleitung Multiplex ROYALevo7 (Seite 57 von 77) (Englisch)

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ROYAL evo 7

Page 56

x AUTOROT

with collective pitch range –8 ... + 12q, providing the

optimum blade settings for collective pitch minimum

and maximum for auto-rotation landings.

 TIP:

In our experience the correct blade pitch angle for hov-

e r i n g i s a r o u n d + 5 ° , a lt h o u g h t h i s d o e s va r y f r o m m o d e l

to model. When setting up the collective pitch curves

you should ensure that this value is reached at ap-

proximately the same collective pitch stick position in

all the collective pitch curves, otherwise the model will

“jump” when you switch from one flight phase to an-

other.

! Note: Models with CCPM swashplate

Do not set the collective pitch curve points

P1 and P6

to + and - 100%, otherwise symmetrical cyclic move-

ments (pitch-axis and roll) will not be possible at maxi-

mum and minimum collective pitch, since the servos

will already be at the limit of their travel (

P1 and P5).

Depending on the travels for roll and pitch-axis, we re-

commend setting the max. and min. collective pitch

curve points

P1 and P6 t o a r o u n d 7 0 t o 8 0 % .

! Note: Altering the neutral position

If the system is to work correctly it is essential that you

set up the neutral position of the collective pitch trans-

mitter control to suit your preference as a pilot:

Collective pitch minimum forward or back

This setting can be changed in Menu L

Setup, Con-

trol

(Î 13.3.3.).

Step

u Setting up the throttle curve

The throttle curve (P1 ... P5) is set up in Menu H Con-

trol / Throttle

( Î 14.1.11.).

In model helicopters the throttle servo, or the electric

motor speed controller, is not controlled directly by a

transmitter control, but by the collective pitch stick via a

mixer (collective pitch Æ throttle mixer). The effect of

the collective pitch stick on the throttle servo / electric

motor is determined by the throttle curve. The aim of

the throttle curve is to obtain constant rotational speed

over the full range of collective pitch, i.e. for every col-

lective pitch stick position. Only then is it possible to

achieve stable flying characteristics with a helicopter.

The throttle curves for the model templates

HELImech

and

HELIccpm are s e t up by d e f ault, a n d it is o n ly pos-

sible to fine-tune them when the model is flying.

! Note: Throttle limiter and direct throttle

The throttle limiter (F) must be left at the full-throttle

position, and the direct throttle switch DTC (N) must be

set to “0” (= OFF). Only then is the collective pitch Æ

throttle mixer active, and the throttle servo / electric

motor responds to the collective pitch stick according

to the throttle curve you have set up.

! Note:

Electric helicopters with brushless motor used in

“regulator” (governor) mode

If you are using a speed controller for a brushless elec-

tric motor with “regulator” (speed governor) mode, a

throttle curve is not required. Instead a nominal rota-

tional speed has to be defined, as the speed controller

automatically holds the speed at the pre-set nominal

speed. The

Throttle curve can be switched OFF in

the menu 

Memory / Properties ( Î 18.5.4.).

All the throttle curve points (

P1 ... P5) then have the

same value (fixed value). Any changes to one point af-

fect all the throttle curve points.

Setting the idle speed

The

Min. parameter is used to set the motor’s idle

speed when the throttle limiter is at the Idle position.

The idle speed can be fine-tuned using the idle trim

(trim buttons for the collective pitch stick). An idle

speed is not required for electric helicopters. In this case

set the value for

Min. to 0% and the trim to minimum,

so that the motor is stopped when the throttle limiter is

at the idle position.

Step

v Setting up the tail rotor mixer

(static tail rotor compensation / REVO-

MIX)

The tail rotor mixer is set up in Menu G Mixer / TAIL

(Î 15.7.).

In the model templates

HELImech and HELIccpm tail

rotor compensation is switched off by default. If you are

using a modern gyro system in your helicopter which

only operates in heading-hold mode, all the settings for

the

TAIL mixer must be set to OFF or 0% (but please

read the notes on this in the instructions supplied with

the gyro system!).

 TIP:

The alternative is not to connect the tail rotor to the re-

ceiver output

TAIL, but to control the tail rotor directly

using the yaw stick, without a mixer. To achieve this you

must assign

Yaw to a free channel in Menu K Servo /

Assignment

(Î 16.2.). The tail rotor servo or gyro can

then be connected to this channel.

If your gyro system can work in normal or damping

mode, the

TAIL mixer should be activated and set up

correctly, as it reduces the characteristic tendency for

the model to yaw (rotate around the vertical axis) when

there is a torque change, i.e. every time the pilot applies

a collective pitch command. This eases the workload of

the gyro, and ensures optimum tail stabilisation.

This is the procedure for setting up tail rotor compen-

sation:

1. Ensure that the servo output arm and the tail rotor

pitch lever are at right-angles to the tail rotor push-

rod when the tail rotor servo is at neutral. If neces-

sary, adjust the length of the tail rotor pushrod to

achieve this. At this setting tail rotor compensation

will be automatically close to correct for hovering.

 TIP:

When both tail rotor blades are folded to one side,

the distance between the blade tips should be in

the range 10 - 20 mm, depending on the model.

2. Now define the starting point for the tail rotor

compensation mixer: move the collective pitch stick

to the appropriate position (hover point) and trans-

fer the value of the

Collective pitch parame-

ter to the

Zero point parameter (Zero point

parameter Î 15.7.4.).

Multiplex ROYALevo7 Seite 57

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