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Neil and all,
I like to think it is possible to get beyond the limits of the standard car. It will never be possible to actualy achieve .04, but that should be the target.
Daimler Benz started out with the boxfish, but then reality set in, which means the bankers took control. And of course MB is not willing to break out of the 4 wheeled box that has been set as the standard for motor vehicles.
If a car could actually have an overall Cd of .07 and a frontal area half that of the conventional car with double wide seating, we might see energy needed for cars cut by 75% or so. That would start to change things.
It can be fun to put different moldings on production cars, and some stuff can be learned, but for real innovation we need to really think about getting free of the ground effect and conventional wheel arrangements.
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