alelanza wrote:Sorry to revive this one, but can anyone confirm that a forward rotating tyre on an open wheel car would produce downforce as the flow over it slows down/pressure increases?
And if so, is it significant?
Negative on that one.
It produces lift, not downforce.
The drag is very significant - probably the single largest contributor on the car.
I'm not sure how much lift it produces to be honest, maybe some of the guys that have done SAE/Fstudent work would have a better idea.