Preliminary report on the characteristics of the NACA 4400R series airfoils
This is a 1939 NACA technical report, issued by the National Advisory Committee for Aeronautics, giving preliminary wind-tunnel measurements of the NACA 4400R series of airfoil sections for aeronautical engineers. The pictures are graphs of lift, drag, moment and centre-of-pressure coefficients plotted against angle of attack, each beside a small airfoil cross-section drawing with its ordinates tabulated; a designer might borrow the clean plotting style, the labelled section profile, or the tabular data layout as a diagram motif.
