Don,
Did not save, but a Ford aerodynamics engineer mentioned that contrary to common thinking, the wing had minimal impact on the cars becoming airborne.
I question that as the wing was designed to work with the car going forward and every time one of them gets turned around going backwards, if you look the rear wheels will lift off the ground. They don't always go up into the air, but that wing in my opinion does have an effect on it. And yes the other series all use wings, but I have also seen their cars go into the air if they get turned at high speed. A wing is designed to create down force when going in one direction.
Ron
