Systematic investigation of Joukowsky wing sections
This is a 1927 NACA technical memorandum from the NASA Technical Reports Server, a systematic study of Joukowsky wing sections, written for aeronautical engineers and aerodynamic researchers. Its pictures are rotated scanned pages of plain line graphs with black and white plotted curves, grid lines, and labelled axes for lift coefficient against angle of attack and drag measurements, so a designer might take from them only the visual rhythm of crossing curves and dense gridded data.
