Operation Manual

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16.1.2. Ail.Diff. (aileron differential)

For fixed-wing models only

Adjustment

range:

Diff.: -100% ... OFF ... 100%

Prefix (+/-) reverses direction

=> reduction of aileron up-travel or

down-travel



Separate values for differential (

Diff.)

can be set for each flight phase

The differential value (

Diff.) can be al-

located to the 3-D digi-adjuster

(Î 20.1.)

A simple description of aileron differential:

If ailerons are set up with symmetrical travels, i.e. the

same deflections up and down, then the down-going

aileron on the outside of the turn generates more drag

than the up-going aileron on the inside of the turn.

This results in a negative turning moment (known as

adverse yaw) which tends to push the model out of

the turn. The model yaws - nose-high - as it turns.

Aileron differential reduces the adverse yaw effect by

reducing the deflection of the down-going aileron. Ai-

leron differential is only possible if a separate servo is

installed for each control surface. The effect of

100%

differential is that the ailerons only deflect in the “up”

direction (sometimes known as “split mode”).

Aileron differential is not generally required for high-

speed powered model aircraft with symmetrical wing

sections. Model gliders usually feature cambered air-

foils, and in such cases a good starting point is about

50% differential. The optimum values can only be es-

tablished through practical flight testing. The more

highly cambered the wing section, the more differen-

tial is generally needed. That is why the system allows

you to set different levels of aileron differential for

each individual flight phase.

Example:

Glider with the following flight phases:

NORMAL:

Ail.Diff. = 50%

THERMAL*:

Ail.Diff. = 65%

SPEED**:

Ail.Diff. = 40%

* The ailerons (and in some cases the camber-changing

flaps) are lowered slightly for the Thermal task:

=> Airfoil camber increased

=> Greater aileron differential required

** The ailerons (and in some cases the camber-changing

flaps) are raised slightly for the Speed task:

=> Airfoil camber reduced

=> Less aileron differential required.

Parameter

Mode:

The

Mode parameter is used to activate or disable the

Aileron Differential mixer (switch it ON or OFF).

If both ailerons are raised in order to act as a landing

aid, then

+SPOILER should be selected as the Mode.

This suppresses aileron differential when the landing

aid (transmitter control:

Spoiler) is extended. The

effect of this arrangement is that more aileron re-

sponse is available on the landing approach, since the

aileron travels are not reduced:

Parameter

Diff.:

This is the point where the differential value itself is

set. If the differential works the wrong way round (ai-

leron up-travel reduced, instead of down-travel), sim-

ply reverse the value using the REV/CLR button.

Aileron differential can be set separately for each flight

phase. To set the values, activate the appropriate flight

phase using the flight phase switch ”

Phases 1-3”

(the active flight phase is displayed in the top line, and

also by the number before the parameter) and set the

desired value for

Diff.:

16.1.3.

Controls Mix (transmitter control mixer)

! These mixers are not global, but model specific,

i.e. they can be set separately for each model.

The transmitter

Controls Mix mixes the signal from

any second control (

Source) into any other transmit-

ter control (

Target). The mixing affects all servos

which are connected to the

Target control either di-

rectly or via a free mixer:

£Controls Mix.NORMAL

¨Exit

Travel – OFF

Source --------

Target --------

Switch ON *

Symmetrical mixer.

Adjustment range:

-100% OFF 100%

Increment:

! Variable for each flight phase separately!

The mixer can be switched on and off using a mixer

switch (

Mix-1 to Mix-3).

The options are as described for the free mixers under

(Î 14.2.3.):