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Old 02-26-2019, 08:41 PM   #789 (permalink)
kach22i
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Just A Car Guy: aerodynamics

Quote:
in an era before wind tunnels, threads were attached to the body of a vehicle; the prototype was then photographed at speed on the road, and the body's curves then adjusted to the paths of the threads—what engineers called streamlines. More recently tufts of yarn are taped onto cars

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You cannot sell aerodynamics in a can............
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