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On 29 Aug 2005 at 19:09, John Jaranson wrote: > By my estimates, based on some old data I dug up, the three main body > styles stack up like this: > > Fasty CD 0.32 CL 0.36 > Notch CD 0.34 CL 0.38 > Square CD 0.37 CL 0.41 > > So the Fasty is the best aerodymanically....lowest CD and lowest CL. I realize that these are good careful estimates, made by someone who knows more than a little bit about the subject, but I hope you'll admit that there's no substitute for real data. In a recent conversation with a friend, he mentioned that he had calculated his personal CD on his bicycle, by measuring his terminal velocity coasting down a long hill of known slope. I wonder if we could do something similar with a few type 3s. I could imagine that tires might become an issue, and we'd have to take weight differences into account, but this sounds cheaper than a wind tunnel. Would you care to comment on any differences between the early and late body styles? I assume the real data was all from an early body notch; is that correct? > You can learn more by going here: > > http://mywebpages.comcast.net/jaransonT3/jaransonT3/AeroPage.html Good stuff, as always. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~