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Balanced and servo control surfaces (1930)
NASA Technical Reports Server (NTRS) · leaf 18
N.A.C.A. Tec>.nical Eomoraniuin 32o..563 Figs.5,6a … Aileron angle(degrees) Fig.6;NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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