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Does Area Under Car Count in Frontal Area?
Looking at Phil Knox seminars, particularly #2, I am left with a question or two. We obviously want to lower the "drag index" of a car in order to achieve the most aerodynamic vehicle. (Drag index being the product of Cd and physical frontal area.)
In this context, is the area under the car and between the wheels usually counted in the physical frontal area? The question has some importance if one considers lowering a car to achieve a lower drag index.
I think I have heard that there is a theoretical "ideal" height of a car's underbelly to achieve minimum drag. Can't find a ref though. Anyone have a ref or info?
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