    ======================================================
    = 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     =
    ======================================================

    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/

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    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.

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    **************************************************
     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
    **************************************************