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Old 07-11-2008, 04:58 PM   #13 (permalink)
co_driver
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Join Date: May 2008
Location: Vancouver, BC
Posts: 9

G-metro - '95 Geo Metro
90 day: 54.43 mpg (US)
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Quote:
Originally Posted by texanidiot25 View Post


So what are the best numbers?
Numbers to use:
L* = effective diameter of your car [1990 Firebird: (72.4" (width) * 49.8" (height) )^0.5 = ~60" = 1.53 m]
v = velocity [50 mph = 22.35 m/s]
'nu' = 1.6*10^-5 m^2/s

Thus: Re = 1.53 * 22.35 / 1.6*10^-5 = ~2,100,000

(*) Note:
A better reference would be the effective diameter rather than its length, as length is used for flat plates.

Now, on to making 2-D renditions of vehicles I have once owned...
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