NASA_NTRS_Archive_19930091215
A 1923 NASA Technical Reports Server scan of a technical report on pressure distribution over thick aerofoils, with plates of graphs and charts for aeronautical engineers. The pictures are dense line graphs of pressure against chord position at many angles of attack, with upper and lower surface curves plotted in dashed and solid lines, so a designer might borrow the clean grid of small matched plots as a diagrammatic pattern.
