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Originally Posted by .Cd
MarkW365 : So I'm still so confused.
If a sleek rounded shape leads to better aero, how can a brick with rounded edges give the same .Cd ?
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Sometimes vehicles which appear slick are not.As for the front,if you can keep the flow attached to the point of maximum cross-sectional area,you're 40% there.And this can be achieved with 3% of vehicle- width- radius at top and sides.It doesn't look aero but it works.The real challenge to drag reduction occurs behind the point of maximum cross-section.I did an installment on vehicle fronts.Larry Shinoda's development of the Trans Am's front end is in there.It's very clean.With speed limiters removed,these cars can approach the top speed of the Corvette.Klemperer's 1922 brick "minivan" has Cd0.16.A brick can be okay,fastbacks are the lowest drag,but only if all the rules are followed.