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aerohead,
You said, "If you did your body as small as my 1984 CRX ( around 42-inches ) the body would be 19-feet in length and would require 8-feet of ground clearance to nullify the drag increase due to ground proximity."
I say,
Where the heck does that '8-feet' number come from? I might guess that this is a standard for wind tunnel size such that very accurate measurements can be made. I see that as a very different standard than the needed road clearance to minimize ground effect to a level that would not increase drag by more than about 20%. I argue for two feet clearance based on Morelli data in the book I gave reference for a couple comments back, as well as a variety of less direct indications from other publications.
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