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Old 04-22-2020, 01:25 PM   #22 (permalink)
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Originally Posted by aerohead View Post
I went back to the:
Index of Phil Knox Aerodynamic Seminars & Mod-data lists,under, Mod-data Lists: #7.
General Motors investigators found that the John Shinella aero wheels (think MOON wheels) for the Pontiac Trans Am,returned 0.027 lower drag than the open,standard steel wheels,as measured at the Lockheed,Marietta,Georgia full-scale wind tunnel.
Historic data is always interesting, but quoting wind tunnel test results for wheel drag when (1) the wheels weren’t turning, and (2) the undercar airflow was completely different, is not likely to be helpful when discussing wheel drag on current cars.
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