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Not until 1908 was it suggested that an aircraft could be driven by jet propulsion. RenŽ Lorin, a French engineer, proposed using a reciprocating engine to compress air, mix it with fuel, and thus propel the aircraft by the pulses of hot gas produced by combustion of the mixture. Henri Coanda, a Romanian engineer, experimented with a reaction-powered aircraft in 1910, and observed the phenomenon now known as the Coanda effect . In 1939 the English engineer Frank Whittle developed a jet engine that powered a full-sized aircraft, and a year later Secundo Campini in Italy flew for 10 min using a thermal jet engine.
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