[KamperBob]

Originally Posted by Sven7

http://ecomodder.com/forum/showthrea...tml#post294074





(I find it interesting that the bus with the rounded end boat tail (0.263) has lower drag than one with edges (0.274), since we usually say edges are better on the rear end.)

Good observation. That's not all.
* Comparing #4 & 5 Cd 0.314/0.325 => 3.4% reduction.
* Comparing #6 & 7 Cd 0.263/0.274 => 4.0% reduction.
IMHO two taller sides play a larger role than one narrower top edge.