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The flight of an autogiro at high speed (1933)

NASA Technical Reports Server (NTRS) · leaf 19

An illustration from The flight of an autogiro at high speed, 1933, leaf 19
1I.A.C.A. Technical Memorandum ITo. 729 Figs. 9,10

NASA Technical Reports Server (NTRS)

Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.

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