FYI: A Hi-Res version of the image Frank Lee posted can be found below, click on the image and it gets huge.
DLR Portal - Portal - Schlörwagen-Strömungsbild
Translated caption reads:
Quote:
The Schlörwagen was an experimental car that caused a stir in 1939. His Windschlüpfrigkeit, measured as the so-called drag coefficient (Cw), was sensationally low at 0.186. Additional measurements of VW in the seventies, a model confirmed that the Schlörwagen even a Cd of just 0.15. Today's passenger car range with a drag coefficient from 0.24 to 0.3 is not favorable to the aerodynamic shape of the car Schlör approach.
The picture shows a model of the Schlör car in the wind tunnel: the tight flow is clearly visible.
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