Michael, Very nice flyer, and it has a sharp 3d model too. This one should be a lot of fun for the glider enthusiasts. Now all we need to add is a real tow plane and thermals. :-)
Curt. Michael Selig writes: > > I have just add an ASW 20 to the CVS. Not only does it include the > flight dynamics model, but also there's an external model from Roland > Stuck! He has granted permission for us to use and release these with > FlightGear under the GNU GPL. > > Taken together, this is one really neat airplane in FGFS. > > There's a readme file on the external model from Roland Stuck in: > ~/fgfsbase/Aircraft/asw20/Models/uiuc/asw20-stuck/ > > The flight model readme from ~/fgfsbase/Aircraft/UIUC/ is included below. > > Regards, > Michael > > ====================================================== > = ASW 20 = > = 15-meter class sailplane = > = for FlightGear with LaRCsim and the UIUC Aeromodel = > = = > = Flight model by: = > = Michael Selig, et al. ([EMAIL PROTECTED]) = > = http://www.aae.uiuc.edu/m-selig/apasim.html = > = = > = External model by: = > = Roland Stuck ([EMAIL PROTECTED]) = > ====================================================== > > To run, try: > > fgfs --aircraft=asw20-v1-nl-uiuc > > Files and directory structure required in $FG_ROOT/Aircraft/ to fly the > model: > > asw20-v1-nl-uiuc-set.xml > asw20/Models/uiuc/asw20-stuck/asw20-stuck-model.xml > asw20/Models/uiuc/asw20-stuck/asw20.mdl > asw20/Models/uiuc/asw20-stuck/asw20mp_.0af > asw20/Models/uiuc/asw20-stuck/asw20mp_.1af > asw20/Models/uiuc/asw20-stuck/asw20mp_.2af > asw20/Models/uiuc/asw20-stuck/asw20mp_.3af > asw20/Models/uiuc/asw20-stuck/asw20mp_.4af > asw20/Models/uiuc/asw20-stuck/asw20mp_.5af > asw20/Models/uiuc/asw20-stuck/asw20mp_.6af > asw20/Models/uiuc/asw20-stuck/asw20mp_.7af > asw20/Models/uiuc/asw20-stuck/asw20mp_.8af > asw20/Models/uiuc/asw20-stuck/asw20mp_.9af > asw20/Models/uiuc/asw20-stuck/asw20mp_.aaf > asw20/Models/uiuc/asw20-stuck/asw20mp_.baf > asw20/Models/uiuc/asw20-stuck/asw20mp_.caf > asw20/Models/uiuc/asw20-stuck/asw20mp_.daf > asw20/Models/uiuc/asw20-stuck/asw20mp_.eaf > asw20/Sounds/uiuc/asw20-sound.xml > UIUC/asw20-v1-nl/CDfa-01.dat > UIUC/asw20-v1-nl/CLfa-01.dat > UIUC/asw20-v1-nl/Cmfa-01.dat > UIUC/asw20-v1-nl/Cmfade-01.dat > UIUC/asw20-v1-nl/aircraft.dat > > These files above come with the FlightGear base package. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Model description and updates: > > 11/8/2002 - First release: v1-nl > > * Roland Struck ([EMAIL PROTECTED]) has granted FlightGear permission to > use and release the external model files with FlightGear under the > GNU GPL. > > * This flight dynamics model simulates an ASW 20 15-meter sailplane. > > * A weights and balance was performed to arrive at an allowable > c.g. location and from that data, mass moments of inertia were > calculated. > > * Lift, drag and pitching moment data is modeled from -180 to +180 > deg. In general, the aerodynamics are modeled using various sources > too numerous to mention here. > > * Apparent mass effects are modeled. > > * The simulation starts on the ground. To simulate being tow, the > throttle can be used. The "thrust" was tuned to simulate a > reasonable line tension and max rate of climb while on tow. > Alternatively, Ctrl-U can be used to jump up in 1000-ft increments. > > * Interesting flight characteristics to note: > > - When starting out, quickly change views to see the external > aircraft. The wings will start out level, and then one side will > drop. For whatever reason, the left wing drops first even though > the data in the model is symmetrical. > > - Taking off requires careful control of the rudder and ailerons. > Use rudder to line up with the runway and ailerons to level the > wings. It is easy to over correct (especially without a > headwind), and the consequences should be reminiscent of being > towed in a real sailplane. [I am speaking from experience, being > a sailplane pilot and having part owned a Pegasus (~ASW 19)]. > > - The max lift-to-drag ratio is approx 42:1. This means that from a > height of 1 mile, the gliding distance is 42 miles. This > efficiency is most readily apparent when flying and landing. > Adding spoilers is a high priority for the next update. > > - The long wings produce an over banking tendency when circling as > would be done in thermals. "Top aileron" is required to keep the > wings from over-banking. In addition extra rudder is then > required to stay coordinated. > > - Tail slides and hammer heads appear to be quite realistic. This > is one bonus that comes from modeling key aerodynamic data from > +-180 deg. > > * What is not yet simulated: water ballast, flaps, spoilers. > > * Drag due to rudder deflection, aileron deflection, and side slip are > not yet added. When these are added, slipping on landing will be > more realistic. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > > ************************************************** > Prof. Michael S. Selig > Dept. of Aero/Astro 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) > mailto:m-selig@;uiuc.edu > http://www.uiuc.edu/ph/www/m-selig > http://www.uiuc.edu/ph/www/m-selig/faq.html (FAQ) > ************************************************** > > > _______________________________________________ > Flightgear-devel mailing list > [EMAIL PROTECTED] > http://mail.flightgear.org/mailman/listinfo/flightgear-devel -- Curtis Olson IVLab / HumanFIRST Program FlightGear Project Twin Cities [EMAIL PROTECTED] [EMAIL PROTECTED] Minnesota http://www.menet.umn.edu/~curt http://www.flightgear.org _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
