Bedienungsanleitung Robbe Futaba FX-40 (Seite 75 von 105) (Englisch)

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Model menu

Butterfly (Crow) mixer

FX-40

18.11 BUTTERFLY (CROW) MIXER

This menu is

used for setting

up a mixer

which pr

oduces

very powerful

braking effect

on the model by

deflecting both

ailerons up and

both brake flaps

down. The

function is parti-

cularly useful

for landing

high-speed

models at res-

tricted flying

sites. If your model features a four-flap wing, it is a straightfor-

ward matter to program this mixer in such a way that that all

the wing control surfaces contribute to the braking effect.

A mixer curve can be programmed for the Butterfly function,

and it is triggered by a switch which you can select. As with

many functions, it is also possible to determine whether the

settings are to apply to all flight modes (Glob) or only to the

currently activated flight mode (Sepa). The transit speed of the

aileron and flap servos can be adjusted individually. A delay

time can be selected, and an Offset point programmed. It is

also possible to adjust the degree of aileron differential in this

menu.

Mark the button field for the ‘Butterfly’ mixer in the Model

menu. The screen now looks like this:

The first step is to activate the Butterfly mixer function in the

Status line. Mark the appropriate field, and the same field then

displays ‘ON’ or ‘OFF’ instead of ‘INA’ (inactive), according to

the position of the switch.

The standard procedure is also employed to set global or

separate mode using the appropriate switch field in the

second line.

A switch can be defined to trigger the mixer, using the stan-

dard procedure: mark the appropriate field and define the des-

ired switch and its direction of operation in the switch select

menu which then appears. The default setting is ‘NONE’,

which means that the mixer is permanently switched on.

A reference point can be entered in the ‘Offset’ line in the form

of a percentage value: move the transmitter control which

actuates the wing flaps to the desired position, and mark the

field. The position of the transmitter control is now displayed

on-screen as a percentage figure, and at the same time the

familiar security query appears. Answer with ‘Yes’, and the

reference point for this mixer is defined.

If you wish to program a delay time to provide a smooth tran-

sition when you switch flight modes, you must first mark the

‘Delay’ line in the ‘Flight mode delay’ frame. You can now enter

a setting using the arrow buttons. The adjustment range is 0 to

27 increments. Please note: the higher the number, the longer

the delay. The maximum value (27 increments) corresponds to

a delay of nine seconds. A special switch can be used to

switch off the delay for particular situations; it can be selected

in the bottom line.

The servo transit speed can be adjusted individually in another

separate frame, using the time-honoured procedure. The

speed can be adjusted separately for each of the aileron and

flap servos, and for the ‘there’ and ‘back’ directions in each

case.

You will find a separate frame on the screen in which you can

enter a percentage for the degree of aileron differential, again

using the arrow buttons. The direction of the differential effect

can also be corrected here if necessary. The adjustment range

is 0% to 120%; the default value is 0%. Pressing the ‘Reset’

button restores the default setting.

The main section of the screen is used in the familiar way for

setting the mixer rates for the (max.) four aileron servos and

flap servos, to suit the model type and wing type you have

selected. The screen shot below shows a typical example of

programming the Butterfly mixer.

Starting from the main display frame, activate the button fields

at the bottom of the screen to move to the AFR (D/R) curve

set-up menu for this mixer, and the programming menu for the

associated elevator trim compensation travels.

• Programming the curve

It is possible to program a curve for the effect of the Butter-

fly mixer

. As an additional featur

e, the fields ‘Rate A and B’

can be marked to adjust the transmitter control travel sepa-

rately for each side of centre. The values are adjusted

exactly as described for programming the Dual Rate cur-

ves. Please refer to this in Section 17.2 on page 58.

Pressing the ‘D/R’ switch field displays the current Dual

Rate settings. The programming facilities here for adjusting

the Dual Rates values parallel those described in Section

17.2 on page 57.

The next step is to determine whether the graphic display is

to apply to all flight modes (All modes), the current active

flight mode (Separate) or the ‘AFR’ and ‘D/R’ settings (AFR

/ DR). Use the customary procedure to select your preferen-

ces.

It is also possible to optimise the servo transit speed to suit

this particular task. You can enter a speed separately for the

‘there’ and ‘back’ directions. The adjustment range is 0 to

27 increments. Please note: the higher the number, the

more slowly the servo moves. The maximum value (27

Tip

aileron

(AIL3)

Main

aileron

(AIL)

Spoiler

(FLAP)

Spoiler

(FLAP2)

Brake flaps

(BRFL & BRFL2)

Main

aileron

(AIL2)

Tip

aileron

(AIL3)

V-tail Ailvator

ELE

ELE2

Robbe Futaba FX-40 Seite 75

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