RE: 90 90q 20v redline top speed

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On Thu, 13 Mar 1997, Bertenyi, Tamas wrote:

> Hmmm. I just consulted my text "Aerodynamics of Road Vehicles" by 

That's a good way to squelch about half the arguers in any discussion!   
(Me included... I'm no exxpert!)   :-)


> Wolf-Heinrich Hucho. He quotes a Cd for the Audi 90Q of around 0.39. 
> These are results measured in the Volkswagen climatic wind tunnel and 
...
> is true that magazines and manufacturers quote much lower figures; 
> typically in the range of 0.29 to 0.31. The reason the first figure is 
> much higher is that it is the true "dirty" configuration. The car is 

Very good point - the real Cd on the highway is always much lower than the 
ideal figures from a wind tunnelmodel (which are usually the ones that 
are quoted.)   From articales I read a while back, it was also true that 
different tunnels around the world produce different numbers on the same 
car because of test differences, or equipment differences.

Later,
Graydon D. Stuckey 
'86 5KCSTQ, getting more toys every day...