54 lines
2.0 KiB
Plaintext
54 lines
2.0 KiB
Plaintext
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JSBSim
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JSBSim is an ongoing attempt at producing an OO Flight Dynamics Model
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(FDM) to replace LaRCsim as the default FDM for FlightGear. It can
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also be used standalone.
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JSBSim uses config files to represent aircraft, engines, propellers,
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etc. Also, the flight control system is described in the config
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file. Normally, for use with FlightGear, the config files are named
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this way [case is significant]:
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<FG_ROOT>/Aircraft/<aircraft name>/<aircraft name>.xml
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Engines are named like this:
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<FG_ROOT>/Engines/<engine name>.xml
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Aircraft and engine config files are present in the FGFS Base package
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which must be downloaded. See the FlightGear web site for more
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information.
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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
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which FDM you want at run time. You can also specify which aircraft
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you want. Currently, for JSBSim only the X-15 and C-172 aircraft are
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available. Here is an example command line used to start up FlightGear
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using JSBSim as the FDM:
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fgfs --fdm=jsb --aircraft=X15 --units-feet --altitude=60000 --uBody=2000 --wBody=120
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or,
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fgfs --fdm=jsb --aircraft=c172
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[Note: uBody is the forward velocity of the aircraft, wBody is the
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downward velocity - from the aircraft point of view. This essentially
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means that the aircraft is going forward fast and has an angle of
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attack of about 4 degrees or so]
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The first command line sets up the initial velocity and altitude to
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allow the X15 to glide down. Note that if you fire up the engine, it
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will burn for only about two minutes and then run out of fuel - but
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you will go very, very fast! The second command line example will
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start up the C172 on the end of the runway.
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Check out the JSBSim home page at http://jsbsim.sf.net. Please report
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any bugs to jsb@hal-pc.org, or apeden@earthlink.net, or post on the
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jsbsim web site using the SourceForge bug tracking system for the
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project.
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JSBSim is written by Jon S. Berndt and Tony Peden with contributions
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by other FlightGear programmers, as well.
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