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Hi,
What I hear being said is that the nose can be blunt, or it can be more pointed -- and the results are very similar. If you get too pointed (even the GM car above has a blunted leading edge), or too long a nose, and it starts to add drag. (What is the Cd of this car?)
After the nose is work well, it's the trailing edge that is harder and more exacting to do.
Our intuition is not always correct: what car has a lower Cd: a 80's Corvette (pointy) or a Durango (blunt)? A: the Corvette has a Cd of 0.45 and the Durango is 0.39.
[Edit: the EV-1 is in the blunt camp, I think; as is the Aptera.]
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