RE: [Jsbsim-devel] DATCOM+ released

[Bill G. <bi...@ao...>]

> >     There is an Air Force report on measured SD's for the=20
> T-37B,  up=20
> > to about 10 deg alpha.  The T-37 is slow enough so compressibility=20
> > shouldn't be a factor.
>=20
> Compressibility is not necessarily a problem with DATCOM.=20
> Specifically, I believe the transonic regime can be=20
> problematic, though. However, if you can supply some "seed"=20
> values, DATCOM will fair the data and give a better output.=20
> This is all from what I've read - I haven't modeled anything=20
> supersonic using DATCOM, yet.


Jon is correct. DATCOM will model transonic and supersonic aerodynamics, =
but
I haven't done anything there either, since I don't have any data to =
compare
it to. You would probably also have to figure out a way to blend the
subsonic, transonic, and supersonic data.

For now, I was just concentrating on the subsonic regime, because that =
is
where most aviation is happening (and where I have truth data). I'd be =
more
inclined to work on the helicopter issue before doing supersonic... Of
course, then I'd be answering mail on why we can't do tilt rotors, =
right?
... And no, you can't have supersonic tilt rotors either  ;-}

Bill