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The aerodynamic characteristics of three tapered airfoils tested in the variable density wind tunnel (1931)
NASA Technical Reports Server (NTRS) · leaf 18
N.A.C.A. Technical Note No.367 Fig.6 1.8 Fig.6 Clark Y tapered airfoil data f®r aspect ratio 6, free air.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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