Difference between revisions of "Flight Dynamics Model"

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(Update since not all FDMs are built by default; +-heading: Splitting up in sections with current historical and other FDMs; +-template: Forum → Forum link; + Link to source code)
 
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A '''Flight Dynamics Model''' (FDM) is a set of math equations used to calculate the physical forces acting on a simulated [[aircraft]], such as thrust, lift, and drag. [[FlightGear]] supports several different types of flight dynamics models. Every aircraft simulated by FlightGear must use one of these models.  
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A '''Flight Dynamics Model''' (FDM) is a set of math equations used to calculate the physical forces acting on a simulated [[aircraft]], such as thrust, lift, and drag. Every aircraft simulated by FlightGear must use one of these models.  [[FlightGear]] supports several different types of flight dynamics models.
  
* '''[[LaRCsim]]''' was originally developed by NASA, and was the first FlightGear FDM, now replaced by JSBSim and YASim.
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== Flight Dynamic Models ==
* '''[[JSBSim]]''' was originally developed specifically for FlightGear, and has been the default FlightGear flight dynamics model since 2000. In addition to airplanes JSBSim also supports rockets, helicopters and [[Aerostat|lighter than air aircraft]].
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=== Integrated FDMs ===
* '''[[UIUC]]''' was developed by the UIUC Applied Aerodynamics Group at University of Illinois, based on LaRCsim, and includes additional features, such as the ability to simulate aircraft icing. UIUC lacks ground interaction.
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Currently (March 2020) FlightGear comes with these FDMs:
* '''[[YASim]]''' is yet another FDM using different calculation methods. YASim supports airplanes and helicopters. It was introduced in FlightGear version 0.7.9 in 2002.
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* FlightGear can also be set up to render using inputs from an external FDM source, such as from [[MATLAB]].
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* [[SpaceFDM]] - suggested by several people
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* Other custom FDM have been written for specific aircraft types, such as for hot air balloons.
+
  
Currently, FlightGear is the only graphical flight simulator to support all of these flight dynamics models.
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; [[JSBSim]]
 +
: Was originally developed specifically for FlightGear, and has been the default FlightGear flight dynamics model since 2000.
 +
: In addition to airplanes JSBSim also supports rockets, helicopters and [[Aerostat|lighter than air aircraft]].
 +
; [[YASim]]
 +
: Is yet another FDM using different calculation methods.  YASim supports airplanes and helicopters.  It was introduced in FlightGear version 0.7.9 in 2002.
 +
 
 +
=== Historical FDMs ===
 +
Historically FlightGear have also been able to use these FDMs, but while the source code is still there they are no longer built by default:
 +
 
 +
; [[LaRCsim]]
 +
: Was originally developed by NASA, and was the first FlightGear FDM, now replaced by JSBSim and YASim.
 +
; [[UIUC]]
 +
: Was developed by the UIUC Applied Aerodynamics Group at University of Illinois, based on LaRCsim.
 +
: It includes additional features, such as the ability to simulate aircraft icing. UIUC lacks ground interaction.
 +
 
 +
=== Other FDMs ===
 +
There are also other ways to set up an FDM:
 +
 
 +
; External FDMs:
 +
: FlightGear can also be set up to render using inputs from an external FDM source, such as from [[MATLAB]].
 +
; Custom FDMs
 +
: Other custom FDM have been written for specific aircraft types, such as for hot air balloons.
 +
; [[SpaceFDM]]
 +
: Suggested by several people
  
 
== Related content ==
 
== Related content ==
{{Forum|49|Flight Dynamics Model}}
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=== Forum topics ===
 +
* {{forum link|s=49|title=Flight Dynamics Model}}
  
 +
=== Wiki articles ===
 
* [[FDM engine feature standardization]]
 
* [[FDM engine feature standardization]]
 
* [[FGPlot]], for built-in runtime plotting of FlightGear properties (including FDM properties) (available in FlightGear 2.11 and later).
 
* [[FGPlot]], for built-in runtime plotting of FlightGear properties (including FDM properties) (available in FlightGear 2.11 and later).
 +
 +
=== Source code ===
 +
* {{flightgear source|path=src/FDM}}
  
 
{{FDM}}
 
{{FDM}}

Latest revision as of 04:55, 29 March 2020

A Flight Dynamics Model (FDM) is a set of math equations used to calculate the physical forces acting on a simulated aircraft, such as thrust, lift, and drag. Every aircraft simulated by FlightGear must use one of these models. FlightGear supports several different types of flight dynamics models.

Flight Dynamic Models

Integrated FDMs

Currently (March 2020) FlightGear comes with these FDMs:

JSBSim
Was originally developed specifically for FlightGear, and has been the default FlightGear flight dynamics model since 2000.
In addition to airplanes JSBSim also supports rockets, helicopters and lighter than air aircraft.
YASim
Is yet another FDM using different calculation methods. YASim supports airplanes and helicopters. It was introduced in FlightGear version 0.7.9 in 2002.

Historical FDMs

Historically FlightGear have also been able to use these FDMs, but while the source code is still there they are no longer built by default:

LaRCsim
Was originally developed by NASA, and was the first FlightGear FDM, now replaced by JSBSim and YASim.
UIUC
Was developed by the UIUC Applied Aerodynamics Group at University of Illinois, based on LaRCsim.
It includes additional features, such as the ability to simulate aircraft icing. UIUC lacks ground interaction.

Other FDMs

There are also other ways to set up an FDM:

External FDMs
FlightGear can also be set up to render using inputs from an external FDM source, such as from MATLAB.
Custom FDMs
Other custom FDM have been written for specific aircraft types, such as for hot air balloons.
SpaceFDM
Suggested by several people

Related content

Forum topics

Wiki articles

Source code