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Old 09-13-2011, 08:59 PM   #1 (permalink)
Cd
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Quick YouTube of rx-8 tuft test

I stumbled upon this quick tuft test of a mazda rx-8 .
I know i'm not the only one here interested in tuft testing so i thought i would share the link.
It's a quick video, but you can see areas of turbulence around the wheel arches. I always knew it would be bad, but never guessed it would be this bad !

Edit : The quoted drag coefficient is .30 for the RX-8 - after seeing the tuft test of the car, all i can say to a number like that is not bad !



I can't help but think of the wheel arches on the Audi A2 with it's superb Cd of .25 and wonder how that Audi managed the area around the wheel arches so well ??



Also of note in the video is the apparent attached flow on the back glass despite the super steep slope of the rear glass. ( You can see the turbulent area at the base of the windows center where the tufts flow upwards.
I'm surprised - i thought there would be less attached flow, but i think it is similar to the 'attached' flow of the new VW Beetle.




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