FlightGear is a free, open-source, multi-platform, and sophisticated flight simulator framework for the development and pursuit of interesting flight simulator ideas. For more information visit <http://www.flightgear.org>.

OPTIONS

--adf=[rotation:]frequency

Specify the initial ADF radio frequency. Optionally may be preceded by a card rotation.

--aero=name

Specify aerodynamics model to load.

--aircraft=name

Specify aircraft to load.

--aircraft-dir=path

Specify the exact directory to use for the aircraft (normally not required, but may be useful for testing).

--airport=id

Specify starting postion by airport ID.

--altitude=value

Specify starting altitude (in feet unless −−units−meters specified).

--atc610x

Enable atc610x interface.

--atlas=medium,direction,hz,options,...

Open an IO connection using the Atlas protocol.

--bpp=depth

Specify the bits per pixel for the renderer.

--browser-app=path

Specify location of your web browser.

--callsign=value

Specify a unique name for multiplayer play.

--ceiling=value[:thickness]

Create an overcast ceiling (feet above sea level). May optionally specify a thickness (feet) which defaults to 2000.

--com1=frequency

Set the initial COM1 radio frequency.

--com2=frequency

Set the initial COM2 radio frequency.

--config=path

Load additional properties from path. Multiple instances of this option are recognized.

--dme={nav1|nav2|frequency}

Specify the NAV radio from which to slave the ADF or set its internal frequency.

--disable-anti-alias-hud

Disable anti-aliased HUD.

--disable-auto-coordination

Disable auto coordination between aileron and rudder.

--disable-clock-freeze

Disable clock freezing so that time advances normally.

--disable-clouds

Disable cloud rendering.

--disable-distance-attenuation

Disable runway light distance attenuation.

--disable-enhanced-lighting

Disable enhanced runway lighting.

--disable-freeze

Start out in a running state.

--disable-fuel-freeze

Disable fuel freeze (enabling fuel consumption).

--disable-fullscreen

Disable fullscreen mode.

--disable-horizon-effect

Disable celestial body growth illusion near the horizon..

--disable-hud

Disable 2D HUD.

--disable-hud-3d

Disable 3D HUD.

--disable-mouse-pointer

Disable extra mouse pointer.

--disable-panel

Disable instrument panel.

--disable-random-objects

Disable random scenery objects (buildings, trees, etc).

--disable-sound

Disable sound effects.

--disable-specular-highlight

Disable specular reflections on textured objects.

--disable-splash-screen

Disable splash screen.

--disable-wireframe

Disable wireframe drawing mode.

--enable-anti-alias-hud

Enable anti-aliased HUD.

--enable-auto-coordination

Enable auto coordination between aileron and rudder.

--enable-clock-freeze

Enable clock freezing so that time does not advance.

--enable-clouds

Enable cloud rendering.

--enable-distance-attenuation

Enable runway light distance attenuation.

--enable-enhanced-lighting

Enable enhanced runway lighting.

--enable-freeze

Start out in a frozen state.

--enable-fuel-freeze

Enable fuel freeze (disabling fuel consumption).

--enable-fullscreen

Enable fullscreen mode.

--enable-horizon-effect

Enable celestial body growth illusion near the horizon.

--enable-hud

Enable 2D HUD.

--enable-hud-3d

Enable 3D HUD.

--enable-mouse-pointer

Enable extra mouse pointer (i.e. for full screen voodoo/voodoo-II based cards.)

--enable-panel

Enable instrument panel.

--enable-random-objects

Enable random scenery objects (buildings, trees, etc).

--enable-sound

Enable sound effects.

--enable-specular-highlight

Enable specular reflections on textured objects.

--enable-splash-screen

Enable splash screen.

--enable-wireframe

Enable wireframe drawing mode.

--failure=system

Fail a system on the aircraft. System may be one of pitot, static, vacuum, or electrical. Multiple instances allowed.

--fdm=name

Specify the flight dynamics model to use. Name may be one of jsb, larcsim, yasim, magic, balloon, ada, external, or null.

--fg-aircraft=path

Specify an additional path to search for aircraft directories. (can be repeated)

--fg-root=path

Specify the root path for data files.

--fg-scenery=path

Specify the base path for scenery data.

--fix=ID

Specify starting position relative to a fix.

--flight-plan=file

Read all waypoints from the specified file.

--fog-disable

Disable fog rendering.

--fog-fastest

Enable fastest fog rendering.

--fog-nicest

Enable nicest fog rendering.

--fov=degrees

Specify initial field of view angle (degrees).

--garmin=medium,direction,hz,options,...

Open an IO connection using the Garmin GPS protocol.

--generic=params

Open connection using the serial port protocol. See README.IO for details.

--geometry=WxH

Specify window geometry (ie. 640x480, 800x600, etc).

--heading=degrees

Specify heading or yaw angle (degrees).

--help, -h

Show a brief help message. Use −−verbose,−v for a full listing of options.

--httpd=port

Start an HTTP server on the specified port.

--hud-culled

HUD displays percentage of triangles culled.

--hud-tris

HUD displays number of triangles rendered.

--in-air

Start up in the air. This is implied when specifying an initial altitude above ground level.

--joyclient=medium,direction,hz,options,...

Open an IO connection to an Agwagon joystick.

--jpg-httpd=port

Start a screen shot HTTP server on the specified port.

--lat=degrees

Specify starting latitude (degrees).

--log-level=value

Set log level for this session (1..5 where 1=verbose, 5=quiet).

--lon=degrees

Specify starting longitude (degrees).

--mach=value

Specify initial mach number.

--model-hz=n

Run the FDM at this rate (iterations per second).

--multiplay=direction,hz,address,port

Specify multiplayer communication settings. Multiple instances allowed.

--native-ctrls=medium,direction,hz,options,...

Open an IO connection using the FlightGear Native Controls protocol.

--native-fdm=medium,direction,hz,options,...

Open an IO connection using the FlightGear Native FDM protocol.

--native=medium,direction,hz,options,...

Open an IO connection using the FlightGear Native protocol.

--nav1=[radial:]frequency

Specify the initial NAV1 radio frequency. Optionally may be preceded by a radial value.

--nav2=[radial:]frequency

Specify the initial NAV2 radio frequency. Optionally may be preceded by a radial value.

--ndb=ID

Specify starting position relative to an NDB.

--nmea=medium,direction,hz,options,...

Open an IO connection using the NMEA protocol.

--notrim

Do not attempt to trim the model when initializing the JSBSim FDM.

--offset-azimuth=degrees

specify heading to threshhold (degrees).

--offset-distance=nm

Specify distance to threshhold (nautical miles).

--on-ground

Start up at ground level.

--opengc=medium,direction,hz,options,...

Open an IO connect to an OpenGC host.

--pitch=degrees

Specify pitch angle (degrees).

--props=medium,direction,hz,options,...

Specify an IO device in which to provide an interactive property manager.

--prop:name=value

set property <name> to <value>.

--pve=medium,direction,hz,options,...

Open an IO connection using the PVE (Provision Entertainment) protocol.

--random-wind

Randomize initial wind parameters. See also: −−wind.

--ray=medium,direction,hz,options,...

Open an IO connection to a "RayWoodworth" motion chair.

--roll=degrees

Specify roll angle (degrees).

--rul=medium,direction,hz,options,...

Open an IO connection using the RUL protocol.

--shading-flat

Enable flat shading.

--shading-smooth

Enable smooth shading.

--show-aircraft

Show a listing of all available aircraft.

--speed=n

Run the FDM "n" times faster than real-time.

--start-date-gmt=yyyy:mm:dd:hh:mm:ss

Specify a starting date/time with respect to GMT (Greenwich Mean Time).

--start-date-lat=yyyy:mm:dd:hh:mm:ss

Specify a starting date/time with respect to Local Aircraft Time.

--start-date-sys=yyyy:mm:dd:hh:mm:ss

Specify a starting date/time with respect to your local system time.

--telnet=port

Start a telnet interface to the property manager on the specified port.

--timeofday=value

Specify a time of day. Value may be one of dawn, dusk, noon, or midnight.

--time-match-local

Synchronize time with local real-world time.

--time-match-real

Synchronize time with the real-world time.

--time-offset=[+-]hh:mm:ss

Specify a time offset with respect to the current time.

--trace-read=property

Trace the reads for a property. Multiple instances allowed.

--trace-write=property

Trace the writes for a property. Multiple instances allowed.

--turbulence=value

Specify turbulence from 0.0 (calm) to 1.0 (severe).

--uBody=value

Specify velocity along the body X axis (feet per second unless −−units−meters specified).

--units-feet

Use feet instead of meters. Affects other options as well as the values displayed by the HUD.

--units-meters

Use meters instead of feet. Affects other options as well as the values displayed by the HUD.

--vBody=value

Specify velocity along the body Y axis (feet per second unless −−units−meters specified).

--vc=knots

Specify initial airspeed (knots).

--view-offset=value

Specify the default forward view direction as an offset from straight ahead. Allowable values are LEFT, RIGHT, CENTER, or a specific number of degrees.

--verbose, -v

Show verbose help message.

--visibility-miles=value

Specify initial visibility (miles).

--visibility=value

Specify initial visibility (meters).

--vor=ID

Specify starting position relative to a VOR.

--wBody=value

Specify velocity along the body Z axis (feet per second unless −−units-meters specified).

--wind=DIR@SPEED

Specify wind coming from DIR (degrees) at SPEED (knots). Values may be specified as a range by using a colon separator; for example, 180:220@10:15.

--wp=ID[@alt]

Specify a waypoint for the GC autopilot. Multiple instances of this option are recognized in build a route.

ENVIRONMENT

$FG_ROOT

Path used to locate data files.

FILES

~/.fgfsrc

Per user configuration file.

$FG_ROOT/system.fgfsrc

System-wide configuration file in command line format.

$FG_ROOT/preferences.xml

System-wide configuration file in XML format.

$FG_ROOT/keyboard.xml

Keyboard bindings.

$FG_ROOT/Input/Joysticks/

Joystick bindings.

$FG_ROOT/mice.xml

Mouse bindings.

BUGS

Send bug reports to <flightgear−devel AT lists DOT sourceforge DOT net> or visit <http://code.google.com/p/flightgear−bugs>.

AUTHORS

Curt L. Olson, et al. See Thanks file for a list of contributors.

pdf

FGFS

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

ENVIRONMENT

FILES

BUGS

SEE ALSO

AUTHORS