Originally Posted by Chesty Morgan
This is only an assumption.
As winglets are generally used to reduce induced drag, of which wake vortex is a by product. I would guess that possibly, and only possibly, that wake vortex and the effects thereof are also reduced. This is a good thing!
Hope this helps
...standing aside to allow those with more knowledge than I to correct me... or is it...more knowledge than me to correct I...?
You can have induced drag with no wake vortex whatever - in the theoretical limit of infinite airfoil, there is no wake vortex (of course), but there is a plenty of drag, incl. induced drag.
But just how does the effect of a winglet on a wake vortex compare with effect of simple wingtip extension?