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The aerodynamic wind vane and the inherent stability of airplanes (1931)
NASA Technical Reports Server (NTRS) · leaf 17
N.A.C.A. Technical Memorandiam No.607 Pigs.1.4,6,8 Fig.l Mount- ing of model for measuring pitching moments• Pai-is Office n,l H.A.c.A.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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