Air Flow Around Finned Cylinders
A 1937 NASA technical report on airflow around finned cylinders, issued as a research document for aeronautical engineers and held in the NASA Technical Reports collection. Its three pictures are measurement charts of temperature difference and air speed against angle in degrees, plus photographs of a finned cylinder test rig with thermocouple tubing. A designer could take from them the restrained look of engineering plots: thin black curves on fine grey graph grids, labelled axes, and stark black-and-white apparatus photographs.
