Quote:
Originally Posted by Frank Lee
More proof we shouldn't get too hung up on small published Cd variations; who knows if they're accurate anyway?
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I'm not current on this sort of thing,but in Hucho's first English translation book of the mid-80s he reported that a VW 1600 was taken to all the pertinent wind tunnels and measured.There was no agreement between any of the tunnels,but their was a standard deviation of around 2.5% or so,and many tunnels' Cds were within this standard deviation.
The GM,Lockheed Marietta,Pininfarina,and one other tunnel in Europe had the 'best' results.
There exists a standard wind tunnel calibration model which all tunnels are supposed to use.
I suppose that its a GOOD thing that automakers think Cds are important enough to 'fudge.'