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Ford Model A Bonneville roadster tunnel testing
Found this HOT ROD article online.Pretty fun!
I ran some numbers from their data.If I discount the air density by 12% (a typical density altitude at Bonneville) I get around 22.05 sq-ft frontal area for the roadster after all the mods.If so,then they dropped the Cd from 0.521,to 0.467.Better than an Indycar/F1 car sans wings.
Thacker and Shine A-V8 Roadster - Hot Rod Magazine
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