David Megginson wrote: > Again, I'm wondering if this is an aerodynamic problem (aside from > the bouncing-around-sitting-still thing). [...] I expect that the > same applies to the assumptions made by YASim's solver.
I'll take a look. By design, at least, YASim should be reasonably immune to this. A surface object "face on" to the wind should (barring bugs) be default produce drag that is about twice what the maximum lift from the surface would be. At 30mph (about 60% of Vso in the 172) that is a significant force, but it shouldn't be unphysically high. My guess is that what you're seeing is gear drift, but I'll investigate. You can tune this, by the way, with the "peak" value in the wing objects. Defining a high peak causes the "pre-stall" lift to be higher in proportion to the total surface contribution. Making the peak value very high will cause the solver to "push down" the surface force to get a solution. The default is 1.5 (i.e. maximum lift at stall is 1.5x as high as the secondary lift peak at 45�), but I'll admit that I don't have a clue what sorts of values make sense for real aircraft. Andy _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
