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I don't know where else to put this (and I'm too lazy to check). It's from another paper. I know Aerohead has shown a graph of Cd versus backlight angle. The quadratic equation is:
y = 0.7762x^2 - 0.2612x + 0.2502
y is in radians
If we recall high school calculus, to find the minima, you differentiate, and equate to 0. Short answer = 30.276* (from the horizontal). hth
I may quote the original Jaguar SAE papers where I found this info. 2008-01-0737
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