Determination of Propeller Deflection by Means of Static Load Tests on Models
This is a 1928 NACA technical report on propeller deflection, published by NASA's Technical Reports Server, with its graphs and photographs aimed at aeronautical engineers. The two charts plot twist angle against radius for clamped and hole-mounted propeller models in the high-speed and take-off conditions, while the photographs show a sandbag-loaded test rig and a propeller blade with weight hangers. A designer might take from them the clean line-graph style with dashed and solid comparison curves, and the stark monochrome photographs of hanging loads.
