On Fri, Sep 5, 2008 at 11:54 PM, Erik Hofman <[EMAIL PROTECTED]> wrote:
> >
> > I also see that (I'm only looking at the speedbrakes effects).
> > Two things are unclear for me:
> > 1. The values of alpha in f16.xml are exactly half those in NASA's
> > TP1538 report.
> > 2. The values of the coefficients are close to each other, but not
> > exactly the same.
> >
> > For CmDsb I'm looking on TP1538 page 58 (PDF page 64)
> > For CLDsb I'm looking on TP1538 page 65 (PDF page 71)
>
> Off course you need to transform the data from body axes to wind axes
> first..
>
> Erik
>
>
Sorry I've mixed the page numbers on TP1538 paper in my former message.
Erik,
1. Transformation from body to wind axes would modify the coefficient values
much more than the differences I see; moreover, I see difefrences even at
alpha=0 (for CmDsb, -0.0036 in f16.xml instead of -0.0038 in TP1538).
2. The alpha values are still HALF those on TP1538.
No matters what our conclusion will be on these issues, I really value the
great job you've done in this model, making it a great source for learning
JSBSim. Thanks.
Fabian
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