Default head-up display: Difference between revisions
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The [http://en.wikipedia.org/wiki/Head-up_display '''Head-up display'''] (HUD) is an important instrument in modern, mostly military, cockpits. FlightGear provides a XML-based system to relatively easily create HUDs for aircrafts such as the [[F-14]] and [[F-16]]. | |||
However, this article's focus is on FlightGear's default head-up displays. Those are available for any craft which does not include its own set. Have a look at [[#Further Information]] if you're planning to create a HUD. | |||
Activate the HUD with the '''<tt>[h]</tt>'''-key. Pressing it repeatedly moves through the configured colours and turns it off again. To change the brightness, press '''<tt>[shift]</tt>+<tt>[h]</tt>'''. Press '''<tt>[shift]</tt>+<tt>[i]</tt>''' to go through the available HUD's. Press '''[i]''' to switch back to the first one at any time. Have in mind that some aircraft do assign one or more of those keys differently and therefore one or more function/s is/are missing on them. | |||
Some of the head-up display's options can be altered in the menu: <tt>View</tt> --> <tt>Adjust HUD Properties</tt> | |||
: | |||
[[File:HUD_default_overview.png|thumb|520px|Huds/default.xml]] | |||
[[File: | == Features == | ||
=== Control inputs === | |||
; [[Aileron]] | |||
: Monitors the bearing of the control input on the aileron's axis. Attached along the upper side is the indicator for the trim input on that axis. | |||
: Properties: <code>/controls/flight/aileron</code> and <code>/controls/flight/aileron-trim</code> | |||
; [[Elevator]] | |||
: Monitors the bearing of the control input on the elevator's axis. Attached to the left the trim on this axis. | |||
the | : Properties: <code>/controls/flight/elevator</code> and <code>/controls/flight/elevator-trim</code> | ||
; [[Rudder]] | |||
: Monitors the bearing of the control input on the rudder's axis. Attached to the bottom the trim input. | |||
: Properties: <code>/controls/flight/rudder</code> and <code>/controls/flight/rudder-trim</code> | |||
; Throttle | |||
: Monitors the throttle input axis. | |||
Monitors the | : Property: <code>/controls/engines/engine/throttle</code> | ||
: | |||
=== | === Instruments === | ||
[[ | ; [[AMSL]] (Height <u>a</u>bove <u>m</u>ean <u>s</u>ea <u>l</u>evel) | ||
: Current altitude relative to sea level in feet (ft) (1 ft = 30.48 cm). | |||
: | : Property: <code>/position/altitude-ft</code> | ||
; g-load | |||
[ | : The [http://en.wikipedia.org/wiki/G-force g-force] appealing to the pilot - to avoid black-/redout. | ||
: Property: <code>/accelerations/pilot/z-accel-fps_sec</code> with factor <tt>-0.03108095</tt> | |||
; [[Avionics and Instruments#Directional_Gyro|Gyrocompass]] | |||
: This is an ideal version of a gyrocompass without the drawbacks of a real one. It shows heading of the aircraft relative to the geographical North Pole (true north) in degree (360 degree scale). | |||
:It | : Property: <code>/orientation/heading-deg</code> | ||
; [[KIAS]] (<u>K</u>nots <u>I</u>ndicated <u>A</u>ir<u>s</u>peed) | |||
: Current speed relating to the ambient air in knot/knots (kt/kts) (1 kt = 1.151 mph = 1.852 km/h). | |||
: | : Property: <code>/velocities/airspeed-kt</code> | ||
: | |||
; Latitude / Longitude | |||
[ | : Current location according to the [http://en.wikipedia.org/wiki/Geographic_coordinate_system geographic coordinate system]. | ||
: To change the format of the displayed coordinates, go to <tt>Autopilot</tt> --> <tt>Set Lat/Lon-format</tt>. | |||
: | : Properties: <code>/position/latitude-string</code> and <code>/position/longitude-string</code> | ||
; Pitch ladder | |||
[[ | : Displays the aircraft's pitch and roll relative to the ground's level/horizontal in degree. It's used as an artificial horizon ([[Avionics and Instruments#Attitude Indicator|Attitude indicator]]). | ||
: Properties: <code>/orientation/roll-deg</code> and <code>/orientation/pitch-deg</code> | |||
; Radio altimeter | |||
:[[Avionics and Instruments#Turn Coordinator|Turn Coordinator]] | : Shows current altitude [[above ground level]] (AGL) in feet. Relating to the location of the aircraft's radio altimeter, it's not zero if the aircraft is on the ground. | ||
: Property: <code>/position/altitude-agl-ft</code> | |||
; Turn-bank-indicator | |||
: [[Avionics and Instruments#Turn Coordinator|Turn Coordinator]] | |||
: Properties: <code>/orientation/roll-deg</code> and <code>/orientation/side-slip-deg</code> | |||
== Further Information == | == Further Information == | ||
The | The setup of the default HUD is defined at <tt>[[$FG_ROOT]]/Huds/default.xml</tt>. | ||
Documentation can be found at [http://mapserver.flightgear.org/git/?p=fgdata;a=blob_plain;f=Docs/README.hud;hb=HEAD <tt>$FG_ROOT/Docs/README.hud</tt>]. | |||
HUD's may be replaced or added by changing or adding their path(s) to preferences.xml (<hud> tag) or by setting the paths as command line options. To change the order of the existing ones the options would be: <code>--prop:/sim/hud/path[1]=Huds/minimal.xml</code> <code>--prop:/sim/hud/path[2]=Huds/default.xml</code> <code>--prop:/sim/hud/path[3]=Huds/NTPS.xml</code> | |||
== Additional | == Additional HUDs == | ||
; HeliHUD | ; HeliHUD | ||
: Designed to fly helicopters in Helicopter View it is also handy for any craft with a not yet finished cockpit. The [http://janodesbois.free.fr/D-HUND/helihud_0.2.tar.bz2 download] contains instructions and specs. | : Designed to fly helicopters in Helicopter View it is also handy for any craft with a not yet finished cockpit. It also contains a minimalistic HUD only showing some navigation informations such as compass and GPS. The [http://janodesbois.free.fr/D-HUND/helihud_0.2.tar.bz2 download] contains instructions and specs. | ||
[[Category:FlightGear feature]] | [[Category:FlightGear feature]] | ||
[[Category:Menubar]] | [[Category:Menubar]] |
Revision as of 18:30, 27 January 2013
Work in progress This article or section will be worked on in the upcoming hours or days. Note: Article is going to be completely reworked. See history for the latest developments. |
The Head-up display (HUD) is an important instrument in modern, mostly military, cockpits. FlightGear provides a XML-based system to relatively easily create HUDs for aircrafts such as the F-14 and F-16.
However, this article's focus is on FlightGear's default head-up displays. Those are available for any craft which does not include its own set. Have a look at #Further Information if you're planning to create a HUD.
Activate the HUD with the [h]-key. Pressing it repeatedly moves through the configured colours and turns it off again. To change the brightness, press [shift]+[h]. Press [shift]+[i] to go through the available HUD's. Press [i] to switch back to the first one at any time. Have in mind that some aircraft do assign one or more of those keys differently and therefore one or more function/s is/are missing on them.
Some of the head-up display's options can be altered in the menu: View --> Adjust HUD Properties
Features
Control inputs
- Aileron
- Monitors the bearing of the control input on the aileron's axis. Attached along the upper side is the indicator for the trim input on that axis.
- Properties:
/controls/flight/aileron
and/controls/flight/aileron-trim
- Elevator
- Monitors the bearing of the control input on the elevator's axis. Attached to the left the trim on this axis.
- Properties:
/controls/flight/elevator
and/controls/flight/elevator-trim
- Rudder
- Monitors the bearing of the control input on the rudder's axis. Attached to the bottom the trim input.
- Properties:
/controls/flight/rudder
and/controls/flight/rudder-trim
- Throttle
- Monitors the throttle input axis.
- Property:
/controls/engines/engine/throttle
Instruments
- AMSL (Height above mean sea level)
- Current altitude relative to sea level in feet (ft) (1 ft = 30.48 cm).
- Property:
/position/altitude-ft
- g-load
- The g-force appealing to the pilot - to avoid black-/redout.
- Property:
/accelerations/pilot/z-accel-fps_sec
with factor -0.03108095
- Gyrocompass
- This is an ideal version of a gyrocompass without the drawbacks of a real one. It shows heading of the aircraft relative to the geographical North Pole (true north) in degree (360 degree scale).
- Property:
/orientation/heading-deg
- KIAS (Knots Indicated Airspeed)
- Current speed relating to the ambient air in knot/knots (kt/kts) (1 kt = 1.151 mph = 1.852 km/h).
- Property:
/velocities/airspeed-kt
- Latitude / Longitude
- Current location according to the geographic coordinate system.
- To change the format of the displayed coordinates, go to Autopilot --> Set Lat/Lon-format.
- Properties:
/position/latitude-string
and/position/longitude-string
- Pitch ladder
- Displays the aircraft's pitch and roll relative to the ground's level/horizontal in degree. It's used as an artificial horizon (Attitude indicator).
- Properties:
/orientation/roll-deg
and/orientation/pitch-deg
- Radio altimeter
- Shows current altitude above ground level (AGL) in feet. Relating to the location of the aircraft's radio altimeter, it's not zero if the aircraft is on the ground.
- Property:
/position/altitude-agl-ft
- Turn-bank-indicator
- Turn Coordinator
- Properties:
/orientation/roll-deg
and/orientation/side-slip-deg
Further Information
The setup of the default HUD is defined at $FG_ROOT/Huds/default.xml.
Documentation can be found at $FG_ROOT/Docs/README.hud.
HUD's may be replaced or added by changing or adding their path(s) to preferences.xml (<hud> tag) or by setting the paths as command line options. To change the order of the existing ones the options would be: --prop:/sim/hud/path[1]=Huds/minimal.xml
--prop:/sim/hud/path[2]=Huds/default.xml
--prop:/sim/hud/path[3]=Huds/NTPS.xml
Additional HUDs
- HeliHUD
- Designed to fly helicopters in Helicopter View it is also handy for any craft with a not yet finished cockpit. It also contains a minimalistic HUD only showing some navigation informations such as compass and GPS. The download contains instructions and specs.