Experiments with Rotating Cylinders in Combination with Airfoils
This is a 1926 NACA technical memorandum, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers, reporting wind-tunnel experiments that pair rotating cylinders with airfoil sections. The pictures are plain line graphs of lift against wing position, a cross-section drawing of an airfoil with a circular cylinder inside it, and two sepia photographs of test rigs with a cylinder mounted before a tunnel nozzle. A designer might take the clean technical plotting style and the hatched airfoil profile as reference for vintage engineering diagrams.
