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Old Nov 16, 2011, 02:22 PM
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In 1986, Demeter Fertis was granted a patent for a stepped airfoil with the step on top. He had the same patent examiner that we had fourteen years earlier, Galen Barefoot. This patent contains all of his wind tunnel data as well as all the claims he made for the stepped concept. Could someone give me their viewpoint on the data expressed by this patent? Does any of this data answer some of the questions brought up in this thread? I would appreciate your opinion concerning the claims that are made in this patent.

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