Quote:
Originally Posted by Frank Lee
I think it's safe to say some of these angles we take for granted can be cheated somewhat (made steeper) if other elements are in place. As evidence I offer the way the upper rear of the EV1 sits under the aero template. With the good Cd it has, I'd think the flow back there is good.
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Frank,I agree. 22-degrees seems to be the magic limit if the C-pillars can feed some air towards the backlight.Chrysler was able to pull this off with the Daytona 500.
I tried to make the template a little liberal.Both development models for Kamm and Jaray have L/D ratios LESS than 2.5:1 and as you can see in the K-car windtunnel photo,the flow separates over the last foot of the roof as it falls way too steeply.
I do believe the EV-1 has separated flow.Check out Gallery-12 in the FLOW-IMAGES and see what you think.