Propeller design - a simple system based on model propeller test data III
A 1926 NACA technical note on propeller design, compiled from model propeller test data and published by NASA's technical reports server for aeronautical engineers. Its pictures are plain line charts of correction factors for aspect ratio, camber ratio and speed-power coefficient, drawn as families of curves on gridded axes with labelled parameter lines. A designer could take from them the restrained chart vocabulary of technical engineering graphics: fanning curves, crossing reference lines and small numeric scale labels.
