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= SIAI Marchetti S.211                               =
= for FlightGear with LaRCsim and the UIUC Aeromodel =
=                                                    =
= Michael Selig, et al                               =
= http://amber.aae.uiuc.edu/~m-selig/apasim.html     =
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To run, try:
fgfs --aircraft=marchetti-v1-uiuc
Files and directory structure required in $FG_ROOT/Aircraft/ to fly the
model:
marchetti-v1-uiuc-set.xml
marchetti/Sounds/uiuc/marchetti-sound.xml
UIUC/marchetti-v1/aircraft.dat
These files above come with the FlightGear base package.
A 3D model of this aircraft does not yet exist.
Nevertheless, various 3D models can be obtained from Wolfram Kuss'
website here:
http://home.t-online.de/home/Wolfram.Kuss/
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Model description and updates:
9/7/02 - Added in more moment to trim at cruise.  Made some slight
         changes to gear parameters.
5/27/02 - First release: v1
* "Linear model" meaning that constants are use for stability
  derivatives.  The chief drawback of this type of model is that stall
  is not properly modeled, and as a consequence an unrealistically
  high lift coefficient is produced when the aircraft is at a high
  angle of attack.  As a result the aircraft can fly much more slowly
  than in real life.
* This particular aircraft has an instability when the nose is pushed
  over with down elevator.  This instability is a consequence of using
  the linear aerodynamics approximation.
* Model largely built from: "Small twin turboprop commuter airplan"
  data from: Roskam, J., Airplane Flight Dynamics and Automatic Flight
  Controls, Part I, DARcorporation, Lawrence, KS, 1995, pg 508-510.
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**************************************************
 Prof. Michael S. Selig
 Dept. of Aerospace Engineering
 University of Illinois at Urbana-Champaign
 306 Talbot Laboratory
 104 South Wright Street
 Urbana, IL 61801-2935
 (217) 244-5757 (o), (509) 691-1373 (fax)
 m-selig@uiuc.edu
 http://www.uiuc.edu/~m-selig
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