Bedienungsanleitung Robbe Futaba FX-40 (Seite 88 von 105) (Englisch)

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Model menu

Throttle curve

FX-40

motor speed

remains as nearly

constant as possi-

ble over the full

range of collective

pitch travel . For

most applications

a five-point curve

is sufficient for this

purpose.

A typical curve for

the ‘Idle-up 1’

flight mode. In this

case the values

are optimised for

the hover, so that

the motor main-

tains the correct

speed for all col-

lective pitch set-

tings. For most applications a five-point curve is sufficient.

A typical curve for

the ‘Idle-up 3’

flight mode. In this

case the values

are optimised for

aerobatics, so that

the motor main-

tains the correct

speed for all col-

lective pitch settings. For most applications a five-point curve

is sufficient.

A typical curve for

the ‘Auto-rotation’

flight mode. The

motor is cut

directly or moved

to the idle posi-

tion, without refe-

rence to any curve

you may have set.

See the ‘Auto-

rotation’ menu (Section 19.4).

All these curves are only a guide; for every individual model

you will need to adjust and optimise the settings through a

programme of test-flying.

• Throttle settings

A separate frame is provided in which you can set the

speed and mode of the throttle servo. The linear mode is

used for controlling non self-neutralising functions, wher

eas

symmetrical mode is intended for self-neutralising func-

tions. A transit speed can be enter

ed separately for both

directions of running, i.e. ‘there’ and ‘back’ (TO / FRO). The

adjustment range is 0 to 27 increments: the higher the num-

ber, the more slowly the servo moves. The maximum delay

time (27 increments) corresponds to a servo transit time of

nine seconds. The settings are changed using the arrow

buttons. The default setting is always ‘0’; pressing the

‘Reset’ button restores the default setting.

• Trimming the throttle setting

The throttle trim can be optimised using the ‘Trim’ switch

field, which is located at the left of the bottom line. Mark the

field, and the display changes to look like this, e.g. for the

‘Hover’ flight mode:

The first step is to activate this option in the standard

fashion: simply mark the Status field, and the label in the

field changes fr

om ‘INA’ to ‘ON’. After this you can deter-

mine whether the settings are to apply to all flight modes

(Glob) or only to the currently activated flight mode (Sepa).

Next you define the throttle trim mode in the ‘MODE’ field.

The options here are ‘NORM’ and ‘CTRM’. With the Normal

trim type the trim range lies symmetrically around the centre

position, and the servo end-points are affected when the

trim value is changed. The Centre trim type also works

around the centre position of the transmitter control, but

does not affect the end-points, i.e. the trim travels become

asymmetrical. You can switch trim mode by marking the

appropriate field.

It is also possible to adjust the trim rate (Rate), or trim travel.

The adjustment range is infinitely variable between 0 and

30% of transmitter control travel; the default setting is 30%.

Mark this option, and use the arrow buttons to set your pre-

ferred percentage value. Pressing the ‘Reset’ button resto-

res the default setting. The direction of effect is defined by

the prefix in the adjacent field; the prefix changes every

time you mark the field.

You can also define the trim range (Range) as a percentage

value using the arrow buttons. If a small range is selected,

the trim only works around the centre position of the trans-

mitter stick. The adjustment range is 0% to 100%. The

default setting is 0%; pressing the ‘Reset’ button restores

the default setting.

The last step at this stage is to define a transmitter control

which is be used to vary the trim. Marking the ‘Transmitter

control’ field calls up the transmitter control select menu;

you can now select your preferred transmitter control using

the procedure already described many times.

The screen shot above shows a typical example of progra

ming the ‘Throttle trim’ function.

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Robbe Futaba FX-40 Seite 88

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