Curtis L. Olson writes:

 > YASim airplanes start flying really crappy if you try to go inverted.
 > If you don't believe me, just try taking the 747 on 100' AGL inverted
 > pass over SFO. :-)

Curt's joking, of course, but it's worth noting that any aircraft with
positive dihedral is going to be brutally unstable in the roll axis
when inverted -- that's why aerobatic planes don't tend to have
dihedral.


All the best,


David

-- 
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/

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