Aircraft Dynamics Models for Use with FlightGear
Modeling and Simulation

Maintained by Michael S. Selig, Rob Deters, and Glen Dimock

UIUC Applied Aerodynamics Group
Dept of Aerospace Engineering
University of Illinois at Urbana-Champaign
Urbana, Illinois 61801

Last update 3/10/02 Changes


Welcome to the Aircraft Dynamics Models web page. The purpose of this page is to provide a compilation of aircraft dynamics models that are sufficiently complete for use in aircraft flight simulators. The data file format is specific to the free open-source FlightGear flight simulator (FGFS), which includes the UIUC aerodynamics-model code initially developed for the Smart Icing System Project at the University of Illinois at Urbana-Champaign. Although the UIUC code has the unique features of modeling aircraft aerodynamics in icing conditions, it can also be used to model aircraft under clean (non-iced) conditions. New aircraft dynamics models will be added as they become available. Contributors interested in developing new models for inclusion here are encouraged to contact us. These models can be easily converted to other formats, such as JSBSim which is the default dynamics model in Flightgear.

Aircraft that can be currently flown with the UIUC aero model of FlightGear include the following

Beech 99 (last update 3/6/02)
Boeing 747 (last update 3/6/02)
Cessna 172 (four versions, last update 3/6/02)  *NEW*
Cessna 310 (last update 3/6/02)
Cessna 620 (last update 3/6/02)
Cessna T-37 (last update 3/6/02)  *NEW*
Convair 880 (last update 3/6/02)
F-104 Starfighter (last update 3/6/02)
F-4 Phantom (last update 3/6/02)
Learjet 24 (last update 3/6/02)
Marchetti S-211 (last update 3/6/02)
Pioneer UAV (last update 3/6/02)
Piper Cherokee (last update 3/6/02)
Schweizer SGS 1-36 (last update 3/6/02)  *NEW*
Twin Otter (last update 3/6/02)
1903 Wright Flyer (last update 3/6/02)  *NEW*
X-15 (last update 3/6/02)

It should be emphasized that these models are approximations to their namesake, hence they are by no means complete. For instance, many of these aircraft have automatic flight control systems that are not modeled. Moreover, in many cases reasonable parameter estimates must be made because some data is unavailable and/or impractical to obtain. Finally, if all the desired data were available, computers are not yet fast enough to model all of the physics. Users desiring that level of sohpistcation will do better buying the real McCoy. However, having said that, in several cases the aerodynamics are modeled in considerable detail and include table lookups to model a number of nonlinear aerodynamic behaviors (e.g. stall and loss of control) that depend on angle of attack, side slip, and control inputs among other parameters. In the data files, some references are given to the sources used in generating the data. Following the aircraft table, a number of notes are given regarding the aircraft model data and the specific use of these files in FlightGear. This data is released under the GNU GPL.

Aircraft (20 models)

Zip archives: Download

Aircraft

Browse Models / Last update

FGFS ver

Comments

File Authors

Primary Sources
Beech 99
beech99-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
         
Boeing 747
boeing747-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
         
Cessna 172
cessna172-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
cessna172-71-v2 (3/6/02) 0.7.8+ nonlinear model / includes stall curve
Cessna 172 as used in fgfs 0.7.1
Scott / Selig Roskam, Tony Peden (FGFS developer)
cessna172-73-v3 (3/6/02) 0.7.8+ nonlinear model / includes stall curve
Cessna 172 as used in fgfs 0.7.3
Scott / Selig Roskam, Tony Peden (FGFS developer)
cessna172-aae319-v4 (3/6/02) 0.7.8+ nonlinear model / uses CL, CD, and Cm curves
Cessna 172 used UIUC AAE 319 course
Scott / Selig Roskam, Ken R. Sivier (UIUC)
Cessna 310
cessna310-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
         
Cessna 620
cessna620-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
         
Cessna T-37
t37-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
         
Convair 880
convair880-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Selig Roskam
         
F-104
f104starfighter-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
         
F-4 Phantom
f4phantom-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Selig Roskam
         
Learjet 24
learjet24-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Selig Roskam
         
Marchetti
S-211
marchetti-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Selig Roskam
         
Piper
Cherokee
piperCherokee-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Roskam
         
Pioneer UAV
pioneerUAV-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Bray
pioneerUAV-nl-v2 (3/6/02) 0.7.8+ nonlinear model / includes 10 lookup tables Scott / Selig Bray
Schweizer 1-36
sgs-1-36-sprite-nl-v1/ (3/6/02) 0.7.8+ nonlinear model / includes CL, CD and CM curves Selig Sim
         
Twin Otter
twinOtter-nl-v1 (3/6/02) 0.7.8+ nonlinear model / includes CL and CD curves Scott / Selig Bragg, et al.
         
1903
Wright Flyer
wrightFlyer1903-nl-v1 (3/9/02) 0.7.8+ nonlinear model / includes CL, CD and Cm curves Selig Culick and Jex, Jex, et al. Selig (airfoil data)
         
X-15
x15-v1 (3/6/02) 0.7.8+ linear model / constant stability derivatives Scott / Selig Jon Berndt (early JSBSim model)
         
           
         
           
         
           
         

Notes

Flight Dynamics Links to more Links


[Top] [UIUC Applied Aerodynamics Group]
m-selig@uiuc.edu