Saari, Martin J., Wallner, Lewis. E.
An investigation was made in the Cleveland altitude wind tunnel to determine the performance of an Aeroproducts H20C-162-X11M2 four-blade propeller on a YP-47M airplane at high blade loadings and high engine powers. The propeller characteristics were obtained for a range of power coefficients from 0.30 to 1.00 at free-stream mach numbers of 0.40 and 0.50 The results of the force measurements are indicative only of trends in propeller efficiency with changes in power coeffiecient and advance-diameter ratio because unknown interference effects existed during the investigation.
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