On 26 May 2010, at 00:47, syd adams wrote:
> Hi Gary ... Ive wondered about this myself.
>
> Found this section in YASim/Surface.cpp :
>
>
> // Similar to the above -- interpolates out the flap lift past the
> // stall alpha
> float Surface::flapLift(float alpha)
> {
> float flapLift = _cz * _flapPos * (_flapLift-1) * _flapEffectiveness;
>
>
> Hopefully Andy can explain it in layman's term :)
This is a wild guess, but from memory (of discussions here), and reinforced by
the code snippet above, effectiveness is a hack/tweak to account for
surfaces/controls that work better/worse than YASim predicts. So effectiveness
of 1.1 makes the flaps 10% more effective. I would assume it's a tweak so you
can say, well, the model is basically okay, but it doesn't respond to xyz quite
right.
All based on zero direct information from Andy, BTW!
James
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