Multiplicity of Solutions in Aerodynamics
A 1927 NACA technical memorandum, number 413, issued by the National Advisory Committee for Aeronautics as a technical report for aeronautical engineers and researchers. It mixes theoretical and experimental work on airfoil pressure distribution, wake formation behind cylinders, and source and sink flow diagrams. The pages are plain engineering line drawings: graphs with labelled curves, schematic wake outlines, and streamline sketches on ruled grids, offering a designer clean diagrammatic structure and restrained monochrome line work.
