Further Studies of Flame Movement and Pressure Development in an Engine Cylinder
This is a 1937 NACA technical report, a government aeronautics research publication by the National Advisory Committee for Aeronautics, presenting engine cylinder flame and pressure studies for engineers and researchers. The first picture is a grid of eight numbered sequence frames of circular flame-spread patterns in a cylinder head, and the second shows a laboratory apparatus with gauges, valves and piping used for photographic timing. A designer might take from them the repeated grid layout of numbered panels and the dense industrial machinery detail with pressure gauges and pipework.
