As part of a general investigation of propellers at high forward speeds, tests of two-blade propellers having the NACA 4-(5)(08)-03 and NACA 4-(10)(08)-03 blade designs were made in the Langley 8-foot high-speed tunnel through a range of blade angle from 20 degrees to 60 degrees for forward Mach numbers from 0.165 to 0.70 to determine the effect of camber and compressibility on propeller characteristics. Results previously reported for similar tests of a two-blade propeller having the NACA 4-(3)(08)-03 blade design are included for comparison.
Front: Maps show military activities throughout Europe, China, and the Philippines during the week. Inset map: Pacific action Photograph: U.S. Sixty-Ninth Division Infantrymen greet Red Army soldiers on the Elbe River bridge at Torgau. Accompanied by timeline showing dates, key cities, and mileage for both armies to meet. Back: [oblique col. map]: Japan from Siberia.
Date: May 7, 1945
Creator: [United States.] Army Service Forces. Army Information Branch.