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One of Breer's earliest and most startling findings was that the conventional sedan of that era (Circa 1930) was actually more aerodynamically efficient traveling in reverse than moving forward. The reason for this was the abrupt, nearly vertical tail of then-current automobiles, which created turbulence and a partial vacuum that acted as an invisible anchor. To remedy this, a sloping or tapered tail was much preferable to the contemporary practice, which is why avant garde exercises like William B. Stout's Scarab and Buckminster Fuller's Dymaxion had pronounced teardrop shapes with the "big end" of the teardrop in front. These two vehicles packaged their passengers in a rather blunt forward section of the vehicle and put the engine in a tapering tail. To a somewhat lesser extent the production Tatra 77 did the same thing.
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Damn Interesting » The Extraordinary Dymaxion Automobile
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