Quote:
Originally Posted by aerohead
The plan-view of the two vehicle rear ends does nothing to inform us about the rest of the geometry of the two shapes. Conditions are everything.
The Polestar-I notchback is Cd 0.375.
Take a look at the Polestar-3 Precept. There's a reason for the change. Something Elon Musk knew all along.
Hucho gave us a half-dozen shapes with Cd 0.15. There's not a notchback in there. Nor any vehicles below Cd 0.15.
If there's a spoiler on a car, it means that there was a mistake with the original design and they've put a BANDAID on it.
Yes, a Euro-spec Mercedes-Benz CLA 180 Blue Efficiency, notchback and one of the BMWs is Cd 0.22. I've gone lower in my pickup truck.
Really low drag comes only from a fastback, and not just any garden variety. Hucho is crystal clear about it.
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This is Aerohead's normal mix of irrelevancies, errors and half-truths.
If Aerohead believes the rear active spoiler on the Porsche Taycan is a bandaid put on a mistake, he appears to be suggesting he knows more about car aero than Porsche.
Mind-boggling.