Calculation of the pressures on aircraft engine bearings
A 1929 NACA technical memorandum on aircraft engine design, issued by the National Advisory Committee for Aeronautics for engineers and researchers, calculating crankpin and bearing loads in piston engines. Its pictures are dense engineering diagrams of polar force curves, crank angle plots and loci drawn in thin black lines on white paper, showing how forces vary around a rotating crankshaft and offering a designer a clear graphic vocabulary of radial loops, dashed construction arcs and labelled scales.
