The aerodynamic characteristics of six commonly used Airfoils over a large range of positive and negative angles of attack
This is a 1931 NASA technical report, published by the National Advisory Committee for Aeronautics, presenting wind-tunnel measurements of six common aircraft wing sections across a wide range of positive and negative angles of attack. The pictures are line graphs of centre of pressure, lift coefficient and drag coefficient plotted against angle of attack, with a small airfoil profile drawn in the lower area of each chart; a designer might take their clean grid layout, dashed-and-solid curve styling, and simple profile sketches as a model for technical data graphics.
