Research on the control of airplanes
This is a 1928 technical report on airplane control research, issued by NASA's technical reports archive, which in its digitized form records the early aeronautical studies of the era. The pictures are plain line graphs of angular velocities (yaw, roll, pitch) in degrees per second plotted against time, with dashed vertical markers and separate traces for rudder, ailerons and elevators; a designer might take from them the clean, labelled chart style of early engineering data displays.
