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i am testing foils that are crescent-shaped (like fish caudal fins). they are upper/lower side symmetrical, but the form (extended wing tips) induces a lot of vortices. i am finding it quite difficult to find theories of fluid dynamics for these kind of effects. thanks for the help.

and therefore the wing tip vortices "induced" by pressure differentials between upper and lower side of the wing would also not appear?

hi. this may seem a stupid question, but i have gone through a couple of books now (dubs, hoerner, schlichting, crowe)and i still don't quite get it. according to the basic formula, induced drag coefficient of a wing is proportional to lift coefficient squared: C(draginduced) = C(lift)^2 /...