The characteristics of 78 related airfoil sections from tests in the variable-density wind tunnel
A 1933 NASA technical report from the NACA, compiling wind-tunnel test data for 78 related airfoil wing sections tested in the variable-density tunnel for aeronautical engineers. The pictures are dense technical charts: coordinate tables beside plotted curves of lift, drag and pitching moment against angle of attack, plus a small camber-and-thickness plot. A designer could take from them the restrained grid-and-curve vocabulary of early engineering graphics, with tabular columns and labelled axes.
