Full-Scale Wind-Tunnel Tests of a Propeller with the Diameter Changed by Cutting off the Blade Tips
This is a 1931 NASA technical report on propeller performance, issued by the NASA Technical Reports Server collection for aeronautical engineers and researchers. Its pages carry graphs of thrust and efficiency curves plotted against advance ratio V/nD for propellers tested in a full-scale wind tunnel, along with photographs of a propeller series at five diameters. A designer might take from these the clean engineering chart style, with fine grid lines, labelled curves, and sparse serif type, and the sequence of blade-tip shapes that shows how one form changes as it is shortened.
