Lift and Drag Characteristics and Gliding Performance of an Autogiro as Determined in Flight
This is a 1933 NACA technical report on autogiro flight tests, issued by the National Advisory Committee for Aeronautics for engineers and aircraft researchers. Its plots chart airspeed, flight-path angle, vertical velocity and lift coefficients against angle of attack, and one photograph shows a swivel suspension rig fitted with a recorder. A designer could borrow the clean graph layouts, the dense grid of curves and the scientific line-plot style for technical infographics.
