It's getting away from the ram air (RAM air?) you asked about. A real example would be Malcom MacLaren Gordon Murray's new T50 supercar. It uses an auxiliary fan to draw air up into the diffuser on demand. But it robs air from about the rear axle line (above and below), not the front.
https://cimg3.ibsrv.net/ibimg/hgm/19..._100728239.jpg
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Last edited by freebeard; 01-28-2022 at 06:38 PM..
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