Standardization Tests of NACA No. 1 Wind Tunnel
This is a 1925 NACA technical report by the National Advisory Committee for Aeronautics, documenting standardization tests of its No. 1 wind tunnel for engineers and researchers. The pictures are plain engineering graphs: lift-against-drag polar curves for airfoils with plotted erect and inverted data points, a log-scale drag-versus-dynamic-pressure line, and a static pressure gradient along the tunnel's experimental section. A designer might take their sparse grid paper, fine ruled lines, and hand-plotted data markers as a restrained scientific graphic vocabulary.
