Thanks to Tony Peden, JSBSim is now (optionally) fully integrated with FGEnvironment, so you can practice takeoffs and climbs under different atmospheric conditions. To enable this support, you must set the /environment/params/control-fdm-atmosphere to true, i.e.
fgfs --prop:/environment/params/control-fdm-atmosphere I ran two experiments, both starting at KSFO: #1: temperature=-25degC, dewpoint=-30degC, pressure=31.5inHG (At KSFO, density altitude is about 6000ft below sea level.) At Vy (a little over 75kt), after a very short takeoff roll, the C172 settled into an 800-900fpm climb, sometimes hitting 1000fpm. #2: temperature=35degC, dewpoint=34degC, pressure=28.5inHG (At KSFO, density altitude is about 4000ft above sea level.) At Vy (a little over 75kt) after a long takeoff roll, the C172 settled into a 300-400fpm climb, sometimes creeping down to 200fpm. Leaning the mixture probably would have helped. These are close to the extreme conditions most pilots would see near sea level, unless they're flying around Antarctica. For more fun, try the second scenario at a high-elevation airport like Denver. All the best, David -- David Megginson, [EMAIL PROTECTED], http://www.megginson.com/ _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
