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The Source of Propeller Noise (1937)

NASA Technical Reports Server (NTRS) · leaf 16

An illustration from The Source of Propeller Noise, 1937, leaf 16
K.A.C»A. Technical Memorandum No* 825 Figs.18,19.20,21

NASA Technical Reports Server (NTRS)

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

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