The Effect of the Wings of Single Engine Airplanes on Propulsive Efficiency as Shown by Full Scale Wind Tunnel Tests
A 1929 NACA technical report, issued by the National Advisory Committee for Aeronautics and preserved through the NASA Technical Reports Server, presenting full-scale wind tunnel test results on how wings affect the propulsive efficiency of single-engine aircraft. The pictures are engineering graphs of propeller thrust and power coefficients plotted against advance ratio, with measured data points over smooth curves on squared grid paper. A designer might take from them the clean, restrained look of mid-century technical charts: thin black curves, dotted test points, labelled axes and plain typeset captions.
