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Re: the template - where are the vertical % to match the horizontal %? In other words, what are the X and Y coordinates for the template? Does the spline have an equation?
Doesn't the data show that an ellipsoid has virtually the same Cd as the teardrop?
What's the Cd down to 55% template? This is where I see a pickup terminating. It'd be handy to determine point of diminishing returns.
I've observed snow on my car. I hypothesize that sharp corners discourage atmospheric pressure side air from moving towards the lower pressure area above the car, and reduces vortices. If no vortices are created above the roof, then it's even less likely imo to create vortices at the trunk edge. I think that a polyellipsoid reduces the lateral pressure gradient - which also prevents vortices.
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