I've done some work on the C172P JSBSim aero model to make the plane sloppier in slow flight, especially with the flaps extended.
To try it out, start FlightGear with fgfs --aircraft=c172p-3d --altitude=3000 --vc=70 Now, extend full flaps and let the airspeed drop to around 50-55 KIAS. Wiggle the ailerons a bit, and you'll see that the plane handles very differently in the slow-flight regime. Next, try a 30-degree bank with no rudder, and notice that the nose initially moves the opposite direction from the turn (adverse yaw) -- you really need the rudder in slow flight. At normal cruise settings there should be little or no difference from before, but you'll be in even more trouble if you try to climb out at 50 or 55 KIAS or if you let your approach speed drop too low. Crosswind landings with full flaps should also be nastier (as in real life), but I haven't tested them yet. <geek-stuff> I extrapolated most of the information from Roskam by comparing his "Approach" coefficient (presuming full flaps) with his "Climb" and "Cruise" coefficients (presuming no flaps) and adjusting for differences in alpha. </geek-stuff> Enjoy, David -- David Megginson, [EMAIL PROTECTED], http://www.megginson.com/ _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
