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flying apparatus

Original document 1927-04-14 Abstract of GB268279
268,279. Lutsch, A. March 25, 1926, [Convention date]. Void [Published under Sect. 91 of the Acts]. Screw and like propellers.- Each propeller 2, 3 of a flying apparatus for attachment to a person's back consists of a blade having a single or, as shown, a double helical surface diverging from the axis as the upper end of the blade is approached. The end of the blade may be wedge-shaped.

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