Airplanes in Horizontal Curvilinear Flight
This is a 1924 technical report from NASA's Technical Reports Server, a set of engineering graphs on airplanes turning in horizontal curvilinear flight, written for aeronautical engineers and designers of aircraft performance. The pictures are plain black-and-white line graphs on gridded paper, with curves labelled by letters and axes marked in feet, meters and angle of attack, so a designer might take from them the visual vocabulary of technical plotting: dense grids, lettered families of curves and dual scales.
