Negative Thrust and Torque Characteristics of an Adjustable-Pitch Metal Propeller
This NACA technical report from 1934, issued by the National Advisory Committee for Aeronautics in the United States, presents wind-tunnel test data for an adjustable-pitch metal propeller in negative thrust and torque, meant for engineers and aircraft designers. Its pictures are mostly graphs of thrust and torque coefficients plotted against advance ratio, with fine grid lines and labelled curves for blade angles, plus two photographs of nacelle and propeller models mounted in a test tunnel, offering a designer a clear view of how engine-nacelle and propeller assemblies were set up for aerodynamic study.
