(Land Shorter!) wrote in message om...
Actually Dave, vortex generators are WELL proven. They have been


They aren't for every aircraft. In fact most modern/clean sailplanes
won't benefit from using them on your laminar wings (though zig-zag
and dimple tape, a version of VGs, often works very well). But for
non-laminar airfoils, especially for STOL aircraft that need to
operate safely when low and slow (like your tugs), my vortex
generators are just the ticket.

Actually VG's are of some use on laminar wings, especially those that
are sensitive to bugs,dirt,and rain. Keeps the boundary layer
attached rather than seperating. This may be of little use to glider
folk that need/want the last bit of L/D but sure helps the canards of
some power planes.
===============
Leon McAtee