Charts expressing the time, velocity, and altitude relations for an airplane diving in a standard atmosphere
This is a 1937 NACA technical report of charts plotting altitude against velocity for an airplane in a dive, issued by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers. Its pictures are dense grid charts with curved trajectory lines fanning down from high altitude, labelled with dive angles and time values, offering a designer little beyond a stark technical graph aesthetic of fine grids and labelled curves.
