Manual Robbe Futaba FX-40 (page 80 of 105) (English)

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Model menu

Ailvator / Winglet

FX-40

18.16 WINGLET RUDDER SETTINGS

This menu pre-

sents all the

mixer functions

equired for con-

trolling rudder

panels in the win-

glets of a fixed-

wing model air-

craft. These con-

trol surfaces have the same effect as a conventional rudder,

but tend to be more effective since they are not located in the

turbulent airflow from the propeller. This reduces drag, and

therefore helps to improve flight performance.

The function is primarily employed on flying wing models with

winglets at the wingtips. The sketch shows the arrangement of

the functions.

Mark the ‘Winglet’ option in the Model menu. The screen dis-

play now looks like this:

The first step is to define the mode (‘Glob’ or ‘Sepa’) in the

usual way, after which the servo travels for both winglet rud-

ders can be set separately for rudder and rudder 2, in the form

of percentage figures. The same applies to the directions of

movement; this procedure has already been described in full:

first mark the appropriate field, then enter the percentage

value using the arrow buttons.

The adjustment range is -120% to +120%; the default setting

in each case is 100%. Pressing the ‘Reset’ field restores the

default setting. The prefix determines the direction of travel. If

you change a prefix, the software automatically reverses the

direction of the paired control surface.

With the programming procedure complete, the screen would

typically look like this.

Please note that you can only make use of this function if you

have already selected the appropriate wing type.

Rudder

Rudder2

This programming set-up allows two elevator servos to be

used, but without them having an aileron function, i.e. they

generate no rolling moment around the longitudinal axis.

Once you have entered the data, it is essential to carry out a

check on the model itself to ensure that the Ailvator mixer is

operating correctly, and that all the settings are as required.

Check also that the total travel is not excessive, i.e. that the

system is not restricted or obstructed mechanically in any way.

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Robbe Futaba FX-40 Manual

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