ADVANCED RESEARCH AND TECHNOLOGY
Advanced Space Engines Evolve at Lewis
Cleveland—Roar of large turbojets and the howl of ramjets have been replaced at the Lewis Research Center by the noiseless thrust production of electric rockets in high-vacuum tanks. The research team that was responsible for pioneering work in turbojet afterburners, thrust reversers and noise suppressors, in transonic compressor design and the development of supersonic compressors and efficient inlets for engines, still directs its effort to the myriad problems of propulsion today.