Re: [Flightgear-devel] ASW 20 model added
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
[Flightgear-devel] ASW 20 model added
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
