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Frontal area and shape key; equation link (archive)

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Posted by RichSD on February 28, 2001 at 14:18:04:

In Reply to: Lower drag coefficient, Z3 or VW Microbus? posted by bmv on February 28, 2001 at 10:52:26:

Aerodynamic drag is dependent not only of the coefficient of drag (Cd) but also the area being pushed through the air. The primary contribution to the area is the frontal area as the air flowing over the body contributes relatively little. A car may have a Cd of 0.3 but if it has twice the frontal area it will have roughly the same aerodynamic drag as a car with a Cd of 0.6 (at the same speed and under the same conditions). The link has pretty good discussion. By the way, open wheel race cars have a lousy Cd especially with wings but have lots of power to overcome the drag.


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