Test of a model propeller with symmetrical blade sections
A 1926 NACA technical note from the NASA Technical Reports Server, reporting wind-tunnel tests of model propellers with symmetrical blade sections, written for aeronautical engineers and researchers. Its pictures are plain engineering graphs with grid lines, labelled axes and plotted test curves for thrust and power coefficients against advance ratio, along with a tabulated lift and drag chart. A designer might take the clean monochrome plot style and the restrained grid layouts as a model for technical diagrams.
