[Teri_TX]

Hi Ironside,

I'm afraid I can't see any direct link. In the past I did read most of Creasey's long discourse on his theories of FF design but I really don't care to spend the time again. His acerbic nature can be trying to the spirit.

Creasey's turbulator has the disadvantage of always adding drag even in a no side wind condition (calm air or perfectly head on into the wind). A stall strip can be designed to add no drag up to a defined non-axial apparent wind direction (the solution to the optimal angle is left up to the student :-) . In practice, a fence would behave like a turbulator as rarely is the apparent wind perfectly on axis (a transient condition at best).

I do believe there is a solution to cross wind stability but it will probably involve aero trickery like stall strips, fences, vortex generators, turbulators, et cetera. A fundamental design without add ons may be not be possible unfortunately. Even Dassault Aviation has resorted to winglets in spite of their chief designer's aversion to such band aids, as he believed in "doing it right" from the beginning. An admirable goal not always achievable.

-- Teri