42 lines
1.8 KiB
Text
42 lines
1.8 KiB
Text
JSBSim
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JSBSim is an ongoing attempt at producing an OO Flight Dynamics Model (FDM)
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to replace LaRCsim as the default FDM for FlightGear. It can also be used
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standalone.
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JSBSim uses config files to represent aircraft and engines. Also, the flight
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control system is described in the config file. Normally, for use with
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FlightGear, the config files are named this way:
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<FG_ROOT>/Aircraft/<aircraft name>/<aircraft name>.cfg . Engines are named
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like this: <FG_ROOT>/Engines/<engine name>.dat .
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Aircraft and engine config files are present in the FGFS-Base package which
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must be downloaded from the FlightGear web site at www.flightgear.org or one
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of the mirror sites listed there.
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How to run FGFS using JSBSim
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All the various FDMs are currently compiled into FGFS. You can specify which
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FDM you want at run time. You can also specify which aircraft you want.
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Currently, for JSBSim only the X-15 is available, and possibly the C-172.
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Here is an example command line used to start up FlightGear using JSBSim as
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the FDM:
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fgfs --fdm=jsb --aircraft=X15 --units-feet --altitude=60000 --uBody=2000 --wBody=120
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[Note: uBody is the forward velocity of the aircraft, wBody is the downward
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velocity - from the aircraft point of view. This essentially means that the
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aircraft is going forward fast and has an angle of attack of about 4 degrees
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or so]
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The above command line sets up the initial velocity and altitude to allow
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the X15 to glide down. Note that if you fire up the engine, it will burn for
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only about two minutes and then run out of fuel - but you will go very, very
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fast!
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Check out the JSBSim home page at www.hal-pc.org/~jsb/flightsim.html. Please
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report any bugs to jsb@hal-pc.org, or apeden@earthlink.net, or post them to
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the fgfs-devel mailing list.
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JSBSim is written by Jon S. Berndt and Tony Peden with contributions by
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other FlightGear programmers, as well.
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