Air cooling : an experimental method of evaluating the cooling effect of air streams on air-cooled cylinders
This NASA technical report from 1927 describes an experimental method for measuring how air streams cool air-cooled aircraft engine cylinders, written for engineers and researchers in aeronautics. The pictures are plain line graphs and schematic diagrams, with cooling coefficient plotted against position around a cylinder and a fan duct beside a cylinder sketch, offering a designer little beyond technical charting conventions.
