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Marcel Besson wing sections (1923)

NASA Technical Reports Server (NTRS) · leaf 12

An illustration from Marcel Besson wing sections, 1923, leaf 12
a- 7.4 k- .7 brlO .a 1-1.3. M.B. 13 c-13.8 m~1.8 d-13.6 n-2.1 e-11.5 Or3.0 f-10 .2 p-2 .0 g- 8.3 q-1 ,8 h-.6.5 r-1.5 i- 4.5 s-1.0 0- 2.0 t- .6 … 20 10 JL. K2 .05 .1 a-Parabola of induced drag for aspect ratio of 5.3 Surface area of model S = span b (^78) x chord c (.147)=.1146 m2 Aspect ratio A=b/c-5.3 Velocity-of air in tunnel v=40 m/see (Saint Cyr) Characteristic product vc=5.88 (proportional to Reynolds number) Minimum fineness ratio B=K…

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