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Old 07-07-2010, 03:49 AM   #19 (permalink)
aero guerrilla
Piwoslaw's Avatar
Join Date: Oct 2008
Location: Warsaw, Poland
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Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
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The general shape of today's cars looks like a reversed teardrop, but there are small details that would kill aero when going backwards. One of them is the small notch at the rear of the roof. Its purpose is to separate airflow so doesn't stick to the rear glass, increasing lift. In reverse this notch would cause turbulance all the way down the roof.
Another detail is the subtle Kamming of the rear half. Most cars designed in the last two decades have a roof which slopes slightly down, with max roof camber above the driver's head, not in the rear. Exeption: PT Cruiser.

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e·co·mod·ding: the art of turning vehicles into what they should be

What matters is where you're going, not how fast.

"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell

Piwoslaw's Peugeot 307sw modding thread

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