Word: turbojet
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...test flight. It climbed high in the air, then leveled off and shot across the air base with a roar like a thunderclap. This week Long Island's Republic Aviation Corp. proudly announced the results of the flight: its XF-91, powered by a General Electric J47 turbojet and a Reaction Motors rocket engine, had become the first U.S. combat plane to fly through the sound barrier in level flight. (Other supersonic planes, e.g., the Bell X-1 and the Douglas Skyrocket, are experimental speedsters faster than Republic's XF-91 but not designed for battle...
...feet for 8.9 minutes. The XH-17, built for the Air Force by Planemaker Howard Hughes, is designed to lift for short distances loads of several tons (e.g., artillery, bridge sections, tanks and trucks) by straddling them like a lumber carrier. Power is provided by two General Electric turbojet engines astride the fuselage plus afterburners on the rotor tips. Like the Air Force, the Army is also deeply interested in helicopters. Last week it added $200 million to its 1953-54 budget to buy some 4,000 smaller helicopters, ten times what it asked for last year...
With a blast of newspaper ads last week, Westinghouse Electric Corp. boasted it had "the world's most powerful jet engine qualified for production." The new model of its J40 turbojet, said Westinghouse, produces "more than 25,000 h.p. at flight speeds," will go into the Navy's McDonnell Demon and Douglas Skyray fighters...
Conceived in the wind tunnels and laboratories of Hitler's Third Reich, the delta wing passed its early years as a kind of aeronautical curiosity, something for designers to toy with when they sketched supersonic planes of the future. Then turbojet and rocket experts began to turn out engines that had enough power to shove a man-carrying airplane up toward the speed of sound. The fantastic troubles of high-speed flight changed from drawing-board theory into tough, practical problems...
...Rotor. McDonnell will not tell what its convertiplane will be like. Sky-side gossip believes that it will have a rotor driven by some sort of jet. One possibility is small ram-jets on each blade tip to push the rotor around. Another is a central turbojet engine blowing hot gases through hollow rotor blades. The gas will escape as jets from one side of each blade tip, making the rotor spin. When the aircraft has gained enough altitude, the central engine will be used to propel it forward, supported partly by the windmilling rotor, partly by small wings...