Andy Ross writes: > I had some time today to play with YASim stuff. New things in CVS: > > Fuel consumption has finally been implemented. It's pretty simplistic > and doesn't support stuff like tank selection, engine-specific fuel > feeds, inter-tank feeds (or fuel dumping), etc... But it seems to > work. It probably also exposed a bunch of bugs in the engine fuel > flow calculations, too. A spot check looks reasonable to me. > > The out-of-fuel behavior is pretty cheezy too. The engines just act > as if the throttle was at zero. For the piston engines this is fine, > but for jets throttle==0 means "ground idle". Oh well. > > And Curt: this should also fix the tile loader bug where the data gets > corrupted if you fly the A-4 for 3600km. I don't thinkg it can't get > that far anymore. :) > > There is now a per-wing tunable "induced drag" number. One of the > things that the YASim solver doesn't constrain is the drag-due-to-AoA > coefficient. As a result, all aircraft were getting essentially the > same behavior, and this turns out to be really draggy. The jets, and > the A-4 in particular, were flying their approaches way behind the > power curve. I found a throttle setting mentioned in an A-4E NATOPS > manual that didn't jive with what the YASim model was requiring. So I > put a hacked parameter in, and set the default to something more > reasonable. The straight-winged aircraft won't notice any > difference. It's only the high-AoA regime that changed.
Andy, FWIW, the yasim jets seem to behave a lot more intuitively (I know that's subjective) with these latest changes. Good work! Curt. -- 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
