Design of NACA Cowlings for Radial Air-Cooled Engines
This is a 1939 NASA Technical Reports Server engineering report on aircraft engine cowlings for radial air-cooled engines, issued as an aeronautical research document for aviation engineers. Its pictures are plain black line drawings and one photographic strip of cylinder fins, all technical and monochrome; a designer might take from them the clean, schematic way cowl contours, air passages and round engine forms are drawn.
