Interesting explanation, but unfortunately, the explanation of how vortices are created and the effect of winglets in regards to vortices is incorrect.
Due to the research, it is generally known that the vortices are not wingtip, and rollup is a function of the wing and flap settings.
Winglets have been shown to have no effect on vortex generation.
What winglets do, is influence the laminar flow over the top of the wing. In certain flight configurations, increasing laminar flow as the wing narrows, therefore decreasing drag.
The increased friction due to the winglets, nulls their effect at low coefficient lift states.
Again, to date, there has been no measured effect on vortex generation...
Last edited by FlightPathOBN; 6th Jun 2013 at 15:44.