Re: [Jsbsim-devel] New Trim and State Space Routines Added

[Ron J. <wi...@je...>]

On Sunday 28 October 2012 19:10:57 Jon S. Berndt wrote:
> > I think for now I will push a fix to the property names in FGFDMExec.
> > As it sits right now the defaults can't be set from a script or the
> > command line since the properties they depend on don't exist. Also, I'm
> > going to make sure everything that's read gets set.
> >
> > Ron
>
> It's possible that the property names are supposed to be as they are. I'm
> not sure why that would be, though.
>
> Jon
 

It looks like this is the last patch James applied to his tree. He called it 
"Adding simplex support to scripts." He may have intended to use the 
trim/guess/ properties in functions to set the trim/solver properties. I'm 
kind of iffy about always creating a whole bunch of solver properties. But 
pre-creating them is the only way to enable specifying a value in a script or 
on the command line. So, as long as we seem to need them, we should make them 
the live properties and not depend on a scripted layer to set a second set of 
properties?

I also think the creation should be moved out of FGFDMExec, and the default 
values should be set with the property getters in 
src/initialization/FGSimplexTrim, but I will leave the organization for now.

The change I pushed today enables the script 
737_cruise_steady_turn_simplex.xml to function. It seems to lock whatever the 
current flight conditions are, so as written we get a 2500 fpm descent. 
Setting engine throttles to .75 and decreasing the delay for trim to run to 1 
second works much better.

Ron