The Torsional and Bending Deflection of Full-Scale Aluminum-Alloy Propeller Blades Under Normal Operating Conditions
This is a 1938 NACA technical report on full-scale aluminum-alloy propeller blades, written for aeronautical engineers and issued by the National Advisory Committee for Aeronautics. Its pictures are engineering graphs of blade form and blade deflection against thrust, a test rig with a nacelle and propeller mounted on frame legs, and photographs of three metal propeller blades, one with a hub. A designer could take from them the clean, sparse plotting style of technical charts and the stark, grey industrial look of machined metal blades.
