[Dust]

Originally Posted by Deamon

Will try it out later. How complex is the flight model already ?

i think one of the most complex flight models you can get.

http://csp.sourceforge.net/forum/viewtopic.php?t=599

For the most part we aren't using the Falcon4 flight model. The CSP flight model for the F16 is a full implementation of the NASA subsonic windtunnel data for the F16a. It covers alpha from -20 to 90 degrees, and beta +/- 30 degrees, including the deep stall regime. The data has been blended with the Raptor's F-16 FM at trans/supersonic speeds. The fcs implementation is a fairly accurate simulation of the one described in the NASA 1979 doc. The fcs was undoubtedly refined in later F16 blocks, but most of the main limiter functions appear to be the same.
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I'd love to get details of the fcs logic in later series aircraft, but I'm not aware of any public sources of this data. If anyone finds this information please me know!

Btw, if you're curious, the f16 fcs logic can be found in csp/xml/vehicles/aircraft/f16/fcs.xml and csp/cspsim/f16/FLCS.cpp. The flight model is in csp/xml/vehicles/aircraft/f16/fm.xml and csp/cspsim/f16/F16FlightModel.cpp. The NASA paper I've referred to is technical paper 1538, "Simulator Study of Stall/Post-Stall Characteristics of a Fighter Airplane with Relaxed Longitudinal Static Stability" by L. T. Nguyen et al. It's available from a number of sources online.

One last point on this topic is that we are also incorporating the effect of stores, both internal and external, on the aircraft dynamics. This includes drag, drag induced torque, total inertia, and center of mass changes. So as you drain fuel from the wing tanks, the roll inertia decreases. Similarly, if you end up with a forward/aft fuel imbalance you'll change the pitch stability. Nothing very fancy, but important details to include in the overall model.