Experiments with planing surfaces
This 1932 NASA technical report, published in the NACA series and catalogued from the NASA Technical Reports Server, sets out experiments on planing surfaces for engineers and researchers studying hydrodynamics. The four pictures are rotated scanned pages: a schematic of the test rig with weights, pulleys and a speed recorder, a chart of moment coefficient against trim angle for several loading conditions, a set of resistance curves plotted against speed and trim, and a diagram of the carriage arrangement. A designer could draw on their clean, diagrammatic line work and the labelled apparatus layouts for technical illustration.
