> It is hard to tell from what's said whether you're using the > COL as the > reference or the CG. COL is the real reference to use in the > FDM, the CG is > purposefully forward on most craft for stability. The CG swings > around the COL > pivot point noticably when you change pitch. Also all moment > arms are from COL > and you actually load the plane to put the CG where you want it, > the COL is the > real reference point. If you're not already using this, try a > very high wing > low CG plane. Pivot it around the CG. Then pivot it around the > wing's COL. > Which looks even close to the real pivot point?
The forces and moments all act about the center of gravity. It has nothing to do with how things look, it has to do with the laws of physics. I've got some reference material linked from the JSBSim web site. You might want to have a look at some of it. Jon _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
