Aerohead, I found the scholarly article that mentions the C-130 fuselage. They were working with scale models -
http://enu.kz/repository/2009/AIAA-2009-90.pdf
From Kosin & Lehmann's phantom tail research, my math showed that 70% of the original length gave a 12.12% increase in drag. I'm trying to figure out how exactly Hoerner, 1951 got the Cd of 0.158 with what appears to be only ~40% of the tail cutoff, when it takes 70% of the tail to be cutoff to equal a Cd of 0.169 in Kosin & Lehmann's data?
It seems that the more "aggressive" contour receives a greater drag penalty with a truncated tail than the less aggressive contour. The more aggressive contour is better for street driven vehicles due to length. Would there be a happy medium between these, or is the Aero Template the best to use for our daily drivers?