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So what is the difference between the bottom image and the one just up from it? Also, it seems to me like a bottom diffuser area has come into play that was not mentioned earlier. The test samples also seem to be missing a tow vehicle which I'm certain would have an affect on the system here. Sorry, but a 25° top drop angle flies in the face of everything I've come to understand about aerodynamics these past few years.
I'd love to know what is different between the last 2 drawings that makes a .05 difference in the Cd.
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