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Testing a Windmill Airplane ("autogiro") (1927)

NASA Technical Reports Server (NTRS) · leaf 12

An illustration from Testing a Windmill Airplane ("autogiro"), 1927, leaf 12
r N.A.C.A. Technical Memorandum ::o.394 Fics.3 & 4 … Fig. 3 4 Fig.4

NASA Technical Reports Server (NTRS)

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

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