A comparison of the aerodynamic characteristics of the normal and three reflexed airfoils in the variable density wind tunnel
A 1931 NASA technical report comparing the aerodynamic characteristics of a normal airfoil against three reflexed airfoil shapes, tested in the variable density wind tunnel for aeronautical engineers. The single page is a rotated pair of line graphs plotting pressure distribution and coefficients against percent of chord from the leading edge, with grid lines, dashed and solid curves, and printed axis labels. A designer could take the clean scientific plotting style, the dense grid structure, and the contrast between dashed and solid data lines as a model for technical diagrams.
