Wartime report L-370, L-428, L-429, L-434, L-482, L-544, L-583, L-630, L-632, L-634, L-644, L-682. L-428. Drag and propulsive characteristics of air-cooled engine-nacelle installations for 2-engine airplanes [with list of references]; by Herbert A. Wilson, jr., and Robert R. Lehr.