On Thursday, August 26, 2010 06:21:16 pm Jon S. Berndt wrote:
> > From: Hal V. Engel [mailto:hven...@gmail.com]
> > 
> > Since I have started using FG GIT with it's newer versions of JSBSim I
> 
> have
> 
> > noticed that the behavior I had created with the stall/spin function was
> 
> much
> 
> > more pronounced and today I had a closer look at this.  With current
> 
> versions
> 
> > of FG and JSBSim even with my stall/spin function removed I am seeing a
> 
> very
> 
> > pronounced tendency to drop the left wing at the stall and this now acts
> 
> much
> 
> > like it did in FG 2.0 with my stall/spin function included.  Although I
> 
> think
> 
> > the effect is more pronounced with a tendency to snap to the left when
> 
> doing
> 
> > high G maneuvers that was not there with my function and FG 2.0.
> > 
> > It appears that there has been some work done on JSBSim to get more
> 
> realistic
> 
> > stall/spin/snap behavior.  Is this correct or am I imagining things?
> > 
> > Here are my thoughts about what I am seeing.
> > 
> > 1. This is a step in the right direction that should result in a
> > immediate improvement to the stall/spin/snap behavior for most existing
> 
> models.
> 
> 
> I can't think of anything we've done that would have had this effect. We
> have been making some bug fixes, and architectural changes, and so on. I
> guess it's possible that something we did may have fixed an error, which
> resulted in better performance. I'm glad things got better, though!
> 
> Jon

I did a quick test with the pc7 and it did not exhibit any tendency to snap or 
spin.  It mushed straight ahead.   So I concluded that this was something in 
my model.  Turns out that I forgot that I had two functions related to 
stall/spin and I needed to work on both.  Sorry for the noise.

Hal 

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