Quote Originally Posted by A348W View Post
Did the factory say what contribution to the downforce the winglets provided. Quite interesting and I might just get my old naca books out and see if I can figure it out. (Serious test of the grey matter!)

The end plates are interesting as well as they look far bigger than you would need, so either they are that way for style or something else is happening there.

Cheers for posting up.
I cant imagine that the winglets provide much of that downforce. I conclude this from conducting very unscientific studies whilst flying, and sticking my hands out into the airflow.