Mixture Distribution in a Single-row Radial Engine
This is a 1936 NACA technical note, issued by the National Advisory Committee for Aeronautics as a report on mixture distribution in a single-row radial aircraft engine, written for aeronautical engineers and researchers. The first picture is a photographed radial engine mounted on struts inside a wind tunnel, and the second is a set of line graphs plotting CO and CO2 percentages across nine cylinders. For a designer, the pictures offer a stark industrial record: the bare engine against a grid of tunnel framing, and clean graph lines with black-and-white plotting that suit diagrammatic or data-visualisation reference.
