Originally Posted by kymrbill
BTW, the tip vortex is from high pressure air under the wing spilling out toward the top of the wing, not vice versa. ....
I thought that's what I wrote
In any event, I have also flown a Piper Navajo twin across vortices widthwise, which was like hitting a giant speedbump doing 50. It wasn't too pleasant.
Any design that can reduce their effect and improve safety while improving fuel efficiency is a winner in my book. Not to mention they are cool looking too.