Quote:
Originally Posted by freebeard
0.022 before adding suspension and steering, and wheel and tire details. I'd look more at the variation with different details than presume a quantifiable value.
I wonder how they define "filled" and "sealed"
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I'm interpreting their language as:
*the car,in ground proximity,with wheelhouses and wheels,etc. is Cd 0.316.
*with the wheels removed,at same ground clearance,and the wheel houses completely paneled in (as if they were never there in the first place),the Cd goes to 0.214.A 32.2% drag reduction.
By comparison,
*the addition of wheels to the VW flow body increased drag by 53%.
*Cogotti measured a 2.15X drag increase when wheels were added to his low -drag car body.
*Morelli experienced a doubling of drag when wheels were added to his 'banana' car.
*Hucho speaks of a 'doubling' of drag when wheels are added to a low drag body.
*FIAT
ditto.
*on a 1972 semi-trailer,the wheels appear to add zero drag,as they are completely embedded within the turbulence of the rolling sky scraper.
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We'd want to be careful about any generalizations.
