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Figure-1 from U.S. Patent Re19,412, "Aircraft and Control Thereof," dated January 1, 1935, E.F. Zaparka, inventor. This patent describes, and this image shows, a movable "microflap" similar to the fixed Gurney flap independently discovered and first used by Dan Gurney in 1971.
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 01:24, 7 July 2007 | 1,547×777 (39 KB) | Dhaluza (Talk | contribs) | (Figure-1 from {{US patent|Re19412}}, "Aircraft and Control Thereof," dated January 1, 1935, E.F. Zaparka, inventor. This patent describes, and this image shows, a movable "microflap" similar to the fixed Gurney flap independently discovered and first ) |
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