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Old 04-22-2020, 06:52 PM   #29 (permalink)
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Originally Posted by California98Civic View Post
This is the same study that I cited in post 23 above. It supports the idea that a flat disc surface is excellent in reducing drag. It finds a small added benefit inone other design. A graphic from the piece:

That shows that the wheel with the "thick outer radius cover" is in fact better than a fully covered rim. (The thick outer radius cover wheel has openings in it.)

It's one of the reasons that I state in the book that one should not always assume that full wheel covers are best for drag.

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