The Effect of Streamlining the Afterbody of an N.A.C.A. Cowling
This is a 1939 NACA technical report by the National Advisory Committee for Aeronautics, held by NASA's Technical Reports Server, presenting wind tunnel tests of streamlined afterbody shapes for engine cowlings. The record gives no further detail, so the audience is aeronautical engineers. The two plates show laboratory models mounted on wooden stands in front of a tunnel grid: a bullet-nosed body, then a cowling with propeller and tail pump fitted, photographed side-on and at a three-quarter angle. A designer could take the sleek tapered profiles and the stark gridded test-hall setting as references for industrial product forms.
