> Scrounging on the web, Raymer, Anderson, McCormick, Etkin, Roskam from the > Lewis University library, and some cut-n-paste from Tony Peden's configs.
I call this "data mining". :-) > I then tweaked some things to make it more flyable. The yaw values have been > tweaked because I don't know yet how to model a yaw damper. The "dihedral > effect" is a hack, but it makes the airplane behave nicely. An alternative > would be to raise the z-location of the AC_AERORP. There are some tools/equations to calculate many of these coefficients to varying degrees of accuracy. Over time we can probably get much closer. The C-172 aircraft have been tweaked over a period of years. Eventually I'd like to have some kind of GUI that allows aircraft parameters to be input and JSBSim config files to be spit out. > Once I get smart on HUD > design, I'll do more testing and make some final tweaks based on what I > remember from flying it 20 years ago. Great. Of the people I have spoken with who flew the T-38, I gather it is a fondly remembered airplane. > What I'd like to do is keep the entire <AERODYNAMICS> section in a separate > file, which could be called generic_jet_fighter_aero.xml, or something like > that. Then people could more easily build 95% accurate models of any of the > hundred-or-so jet fighters without having to learn aerodynamics. Something like that may be in the works. Jon
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