Drag and cooling with various forms of cowling for a Whirlwind engine in a cabin fuselage

Fred E. Weick
naca-tn-301
Nov 1928


An investigation on the cowling of radial air-cooled engines was conducted in the 20-foot Propeller Research Tunnel at Langley Field. Cooling and drag tests were made with each form of cowling. The propulsive efficiency was found to be practically the same with all forms of cowling.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1928/naca-tn-301.pdf