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Old 07-26-2012, 07:02 PM   #18 (permalink)
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Originally Posted by GRU View Post
I see but i guess my question is, if 2 very different (frontal area) cars with the same Cd were going down the highway at 60mph wouild it take the same amount of energy to push them at that speed (assuming that weight and rolling resistance was the same)?
The VW New Beetle and Ford Econoline van are both rated at Cd 0.38.
The Beetle has about half the frontal area as the Econoline and consequently,half the drag at any given speed up to around 250 mph.And it follows that the VW would require half the energy as the Ford to overcome air drag.
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