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Charts for calculating the performance of airplanes having constant-speed propellers (1936)
NASA Technical Reports Server (NTRS) · leaf 14
1T.A.C.A, Technical Note Ho. 579 Fig. 2 … Figure 2.- Characteristics of two-bladed constant-speed peak efficiency propeller.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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