>>Was it 50's cars that turned out to be MORE aerodynamic when going in
>>reverse rather then forward? :)
>>
> 
> It's not urban legend, it's just difficult to measure more of it. There
> have been a lot of testing in exactly those types of things. For a excellent
> reference Look at Hoerner's Fluid Dynamic Drag and chapter 7 pages 12-5 and
> 12-6 shows measurements for exactly what has been discussed.

Dave, since most (all?) of us don't have that reference handy,
would you care to summarize and address the postulates? A/C on or off
vs windows open drag.

R


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