RE: Parameter Estimation

> > I'm an aeronautical engineering student, and I need to construct a FDM for an
> > aircraft of my choice (I don't know yet), for an end of career project. I
> > currently know of two sources for aircraft derivatives estimation:
> >
> > - Digital Datcom
> > - Roskam
> >
> > I was wondering if someone could tell me of more methods for estimation, and
> > information about its precision and aplicability would be greatly appreciated
> > too. Thank you in advance.
>
>
> I'm not completely clear on it, but I've been told that X-Plane can
> calculate some of the derivatives for you.  It calculates those
> depending on shape and design of your aircraft.  How it does it is by
> magic.

Pffft!  Hype. :-\

If you want stability derivatives, you can also go to the NASA Dryden Flight Research
Center tech report server as well as the NASA Langley tech report server and search on
"Stability Control" or "dynamics" or "derivatives" and you will find loads of reports with
that info. If you want specific aircraft aero coefficients, etc. you will have to spend
some time getting those. There is a real art to that. If you know performance data and
aircraft geometry and you want a model up and running quickly you could try YASim.

IIRC, there's an article in one of the JSBSim newsletters about authoring an aerodynamic
model for JSBSim. You could try looking here:

www.jsbsim.org

Also look at the references page.

Jon


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