Wing Pressure Distribution and Rotor-Blade Motion of an Autogiro as Determined in Flight
This is a 1935 NASA technical report, published in the United States for aeronautical engineers and researchers, on flight tests of an autogiro measuring wing pressure and rotor-blade motion. Its pictures are dense technical line graphs plotting wing and rotor coefficients, airspeed, normal acceleration and load against time in seconds, plus a final chart of coning and flapping angles against tip-speed ratio, drawn in black ink with fine gridlines and scattered data points. A designer could take the sparse, grid-based chart style and its labelled multi-axis layouts as a model for scientific diagrams.
