Quote:
Originally Posted by NeilBlanchard
I thought that the new Bug had a Cd of 0.45? The curve in the rear is way too steep. I doubt it has attached flow as far down the back as the picture shows...
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Welcome razordave. The New Beetle has pretty poor aerodynamics as you are aware. The biggest problem is the rounded roofline leading into a too steep back glass. I am including a drawing from another thread. It shows attached flow all down the trunk. What it doesn't show is the two counter-rotating vortexes coming off the C pillar. That is where much of your drag comes from. I think your Kammback is a good start if you can make it strong enough for everyday use.
FWIW, I tuft tested my windshield and the air flowed down and forward where the wipers are. I don't think you will notice much difference by covering the cowl or removing your wipers.