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Preliminary Tests in the NACA Free-Spinning Wind Tunnel (1937)
NASA Technical Reports Server (NTRS) · leaf 8
PRELIMINARY TESTS IN THE N. A. C. A. FREE-SPINNING WIND TUNNEL Figure 3.—Portion of a film record of a steady spin.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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