Quote:
Originally Posted by hat_man
I was thinking something similar to the under skirts on a semi trailer but much smaller and originating at the center under the front bumper going rearward to the rear tires. Like a ships prow, but just the edges. I'm no artist by any means, but I drew this here at lunch. It probably only confuses this more though.
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If rocker panel extensions, the depth of the airdam, are added behind a wraparound airdam, all the way to the rear, a pool of dead air can be captured within its perimeter.
Underbody flow will travel over this upside-down pool of stagnant air, almost as if it were a solid panel. Short of an actual belly pan, it's about the best you could hope for.
You would lose the benefit of a diffuser ( quite significant! ), as they cannot function in the absence of a belly pan. ( A Cd 0.025 penalty on the 1983 Audi 100-III )
The 1983 Pontiac Firebird Trans Am is an example of one car which benefitted from this technology.