Airplane Parachutes
This is a 1925 NACA technical memorandum on airplane parachutes, issued by the National Advisory Committee for Aeronautics for engineers and aviation researchers. The plates are numbered line drawings of parachute canopies, suspension lines, a pack, a buckle, and airflow shapes, drawn in plain black ink on white paper with technical labels and figure captions. A designer might take their clean schematic line work and labelled diagram layout as a model for technical illustration.
