Jolle wrote: ↑
Thu Jan 14, 2021 10:26 pm
Puzzleheaded_Ice wrote: ↑
Thu Jan 14, 2021 8:51 pm
strad wrote: ↑
Thu Jan 14, 2021 8:24 pm
Exactly... The more surface area the more the winds will affect the cars stability.
Compare a Van or station wagon/estate wagon to something sleeker in the wind on the freeway.
The fin improves yaw stability since the aerodynamic force acting on the fin acts rearwards of the CofG and moves the centre of pressure rearwards in a cross wind which provides a stabilising moment
Not to mention the lateral side force which contributes to cornering forces
Plus, it "simplifies" the airflow to the rear wing, which needs less CFD, tweaking, etc to compute and therefore brings the field closer together.
That's not quite true, the flowfield will be different but not simpler.
We dont run any less CFD runs whether you have a shark fin or not, we just keep developing the wing