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    PETERSTEVENS DESIGN BRIEFING

    Mar 16, 2022 5 minutes

    Part 7 Aerodynamics

    CURIOUSLY, WE HEAR LESS ABOUT aerodynamic performance in the 2020s than we did a decade or so ago. In the 1980s, Audi even went through a period of proudly printing the Cd, or drag factor, on the rear side glass of its 100 and 200 models (0.30) and it was a reasonably accurate and reliable figure. Maybe motor companies are now reluctant to give out figures because they are mostly so appalling.

    When you think how early philosophers correctly developed theories about the properties of air when it could not be seen, smelled or tasted, you realise what a giant leap in our quest to understand our environment that was. Unlike religion or superstition, you could see the effects of the wind or feel it on your face, even if your eyes told you that there was nothing there. As

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