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A method of calculating the performance of controllable propellers with sample computations (1934)
NASA Technical Reports Server (NTRS) · leaf 46
Fig. 8 N*A*C*A« … Air speed, m.p.h. Figure 8.-Performance curves for controllable and fixed-pitch pro- pellers. Airplane no. 3.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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