Drag and Cooling with Various Forms of Cowling for a "Whirlwind" Radial Air-cooled Engine II
This is a 1930 NASA technical report, published by the National Advisory Committee for Aeronautics, on wind-tunnel tests of engine cowlings for a Whirlwind radial air-cooled aircraft engine. The pictures are black-and-white photographs of full-scale cowl models mounted on test stands in a wind tunnel, with cutaway views of cowl shapes; a designer might take from them the streamlined nose profiles and the exposed radial engine cylinders.
