Re: [Flightgear-devel] Gas turbine engines modeling

[Jon S. B. <js...@ha...>]

> I use a gas turbine model for the 747 project.  A copy was forwarded to
> the JSBSim project, but it was never incorporated into the baseline.
> 
> It' s patterned after a model used at the NASA Lewis Research Center
> and a paper written by a professor at the Univ of Toledo in Ohio.  The
> exact reference is not handy ATM.
> 
> I'm in the process of reworking the model and setting it up for 0.9.11.
> There are some additional features that are provided for accurately
> modeling the fuel system on the 747 and how fuel moves through the 8
> tanks, cross-feed valves, and plumbing to the engines.  Also presents
> an idea  on modeling variances in engine performance on multi-engined
> aircraft.

Hi, John:

I was almost ready to go to bed, then this came through. :-)

I vaguely remember this. There are several things that are ready or close to
ready to be integrated with JSBSim at this time:

1) A new trim capability (Agostino De Marco - some of this will be presented
at the AIAA Modeling and Simulation Conference during the week of August 20
at Hilton Head in South Carolina).
2) A new external forces capability (for hook and catapult, tow rope,
chutes, etc.) is being developed by Dave Culp.
3) A lighter-than-air capability has been under development for some time by
Anders Gidenstam, and I'd like to get that in at some point.
4) I forgot what this one was ...

Anyhow, how does your new gas turbine model compare with the existing one in
JSBSim - apart from (apparently) being of higher fidelity?

Jon