Planing-surface Tests at Large Froude Numbers - Airfoil Comparison
This is a 1938 NASA technical report on planing-surface tests at large Froude numbers, comparing airfoil shapes, issued by the NASA Technical Reports Server for aeronautical researchers. The pictures are engineering plots and drawings: a line graph of lift-related coefficients, a dense page of velocity and pressure curves with a flat-plate flow diagram, a log-scale curve, and a mechanical test rig with pulleys, weights and a planing sled on a sloped track. A designer might take from them the spare, measurement-driven look of technical diagrams, with thin black lines, grid axes and labelled symbols.
