Hi lunarhighway,
Before 1974 there were no full size automotive wind tunnels. Before then and still today published drag figures for real cars are derived from coast down tests. The drag numbers should be exactly comparable. Some prototype work publishes drag numbers based on wind tunnel tests on models.
-mort
Quote:
Originally Posted by lunarhighway
i wonder how usefull drag coeficients really are for comparison ....
i assume that with more accurate testing these days...such as spinning wheels, etc, drag coeficient would come out higher, because more detailed testing will reveil more drag.
i've heard they're also dependant on the actual wind tunnel used.
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