RE: [Flightgear-devel] Turn ball fix & JSB notes

[Jon S. B. <js...@ha...>]

> > No. I was correct. We may be confusing local coords with body 
> coords. THe
> > acceleration the pilot feels is:
> >
> > acceleration of aircraft cg in local coords
> >
> > +
> >
> > w X (w X r)
> 
> According to Etkin there is another term
> 
>  vPilotAccel = Translation->GetUVWdot()
>                     + Rotation->GetPQRdot() * vToEyePt
>                     + Rotation->GetPQR() * (Rotation->GetPQR() * 
> vToEyePt);
> 
> and that is how we calculate it.
> 
> >
> > Definition: Local frame = world frame ... sort of)


Not sure about that.

Ve = velocity in Local (world) frame of eyepoint
v = velocity of body axis origin
r = radius to eyepoint
w = omega of aircraft body axes

Ve = v + w X r

what is d(Ve)/dt ??

I'll write it in a moment. NOW I have to run to eh pharmacy!!!

Drat!

Jon