Pressure distribution over a Douglas wing tip on a biplane in flight
A 1930 NACA technical note from the NASA Technical Reports Server, presenting flight-measured pressure distribution over the rib sections of a Douglas biplane wing for engineers and aerodynamics researchers. The pictures are technical graphs and isometric wing diagrams: a scatter plot of rib normal-force coefficients with a fitted line, labelled pressure-distribution curves along a wing panel, and a line chart of rib coefficients by flight condition. A designer might take the clean monochrome line diagrams, dense graph-paper grids and fine dashed-leader labelling as a model for technical or schematic illustration.
