Quote:
Originally Posted by arcosine
I coasted 1 mile from 50 to 25 mph, 2400 lb car 6.6 sq feet frontal area, what would the CD be?
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There is only one coastdown protocol which was established by the SAE from which drag coefficients can be deduced.It's available in their 4-volume Handbook.
The instrumentation accuracy and meteorological monitoring requirements are so rigorous,that I don't believe its within the means of the average mortal to pull it off successfully.
I paid one of CAR and DRIVER's staff,and a helper, $500 to do the test on my CRX at the Chrysler Proving Grounds,and data reduction.
I won't attempt them on my own.