I happened to come across
this Volkswagen press release from 2015 this afternoon. It mentions the testing of the Sagitta in 2013 after it was discovered still intact at a car show:
Quote:
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For the V2 Sagitta, a cw value of 0.217 and a drag area of 2.10 mē were measured – outstanding values, although they can be outperformed impressively by aerodynamically optimized modern vehicles such as the Volkswagen XL1: a cw value of 0.189 and a drag area of 1.50 mē were measured in this case.
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(Note that the release wasn't translated well; "drag area" means "frontal area").
Further, they tested it in various configurations:
Quote:
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In the course of tests on the V2 Sagitta, the aerodynamic effects of individual features such as the wheel spats were investigated. If they are removed, the cw value rises to 0.252. If the windscreen wipers are removed or a small rear spoiler is installed, the cw value is reduced to 0.216. The cw value of 0.160 mentioned in contemporary magazines at the beginning of the 1950s was a product of a very vivid imagination.
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