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5. General Electric J47 Turbojet
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First axial-flow turbojet engine approved for commercial use in the United States was the GE J47. Its sophisticated combustion system and variable stator vanes allowed for dependable operation over a broad spectrum of situations. The engine's performance in civilian and military uses proved the sensible feasibility of jet propulsion. Having manufactured more than 30,000 units, the dependability and performance qualities of the J47 set new industry benchmarks for jet engine design and manufacturing.
