The Effect of Streamlining the Aterbody of an NACA Cowling
This is a 1939 NACA technical report, issued by the National Advisory Committee for Aeronautics through NASA's Technical Reports Server, presenting wind-tunnel tests on how streamlining the afterbody of an engine cowling affects drag. Its pages are engineering photographs of scale model nacelles with propellers mounted on test stands, with numbered figure captions beneath. A designer could take from them the smooth tapering forms of aircraft nacelles, the bullet-like ogive profiles, and the clean metal finish of mid-century aerodynamic test models.
