A method of calculating the performance of controllable propellers with sample computations
A 1934 NASA technical report, published by NASA's Technical Reports Server, that gives a method for calculating controllable-pitch propeller performance with worked examples for engineers and aircraft designers. The four pictures are engineering graphs plotting horsepower, rpm, diameter and blade angle against air speed, with curved families of lines on gridded axes. A designer might take from them the clean, restrained look of early technical charts: dense multi-curve plots, legend keys, and dual-axis labelling.
