As David said, there is very little adverse yaw from aileron input on modern aircraft 
designs.  Now, I have no experience of anything but Cessnas but on an A320 for 
example, I would be surprised if the aileron input required to perform say, a 20 deg. 
bank turn would require *any* rudder input at all to maintain balance.  It may even be 
taken care of by the flight computer...

<flameproof jacket on>
So maybe the problem could be with the FDM representing the wrong adverse yaw amount 
for that aircraft?
</flameproof jacket on>


All the best,

Matt.

On 14:04 Thu 08 Jan 2004, Hof Markus wrote:
> I'm not sure of this, but I think you are right! I'll think about.
>     I tried on A320 to fly turn at 25?BNK an ball was never centered! even
> if BNK did'nt change.
> Anyway:
> to keep the ball centered, as you said, I'll need a rudder due to adverse
> yaw (and maybe some other things :)) ).
> I just want to write rudder functions (components in flight modell) to keep
> the ball centered.
> I think the best way to get an error for trigger functions is to take accel.
> of y-axis and keep it to 0.
> The trigger holds accel-y-axis to 0, and so the ball should always be
> centered?

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