Re: [Flightgear-devel] Douglass A-4

[Dave C. <dav...@co...>]

On Saturday 29 April 2006 07:57 am, Jon S. Berndt wrote:
> It seems that in the pitch channel for the A-4 the pilot commands normal
> acceleration. The Az error is computed, and that is differenced with pitch
> rate. That error drives the elevator. See the A-4 section here:

Yes, I just now found the link page at the JSBSim site :(  I guess I haven't 
been paying attention.  Anyway, yes it looks like there was some extra 
damping.

I just used aeromatic to generate an A-4 model, then went through and changed 
the pitch stability derivatives to match those in the Teper paper.  I'll work 
more on it later, but right now I just wanted a model that puts Teper's 
"official" numbers into the pitch calcs.

A short test flight shows an airplane with very light pitch damping, as one 
would expect.


Dave