Turbulent boundary layer of an airfoil
This is a 1937 NACA technical memorandum from the National Advisory Committee for Aeronautics, issued by the NASA Technical Reports Server collection, presenting engineering data on turbulent boundary layers over airfoils for aeronautical researchers. The pictures are plain black-and-white graph plots with grid lines, curves of velocity and shape factors against dimensionless ratios, and labelled figure captions. A designer could take from them only a sense of technical chart layout: dense grids, dashed and solid line legends, and small serif axis labels.
