Quote:
Originally Posted by .Cd
Both you and I have a rounded tail end to our cars.
I'd guess that they are rounded for a reason, but as we know, a sharp edge is usually better than a rounded end.
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I'm not sure you can get any useful info from doing a tuft test comparison of the two styles. A sharp cutoff of a proper taper will simply show the tufts streaming straight back before the cut. A radiused cut off will show some turbulence after the separation point on the curve.
I never did get a good answer to "which is better" after that long thread at GS. It's something I'd like to talk to a pro aerodynamicist about if I ever meet one.