Common
History of the jet engine
Jet engine technology is traced as far back as 150 BC. Advancements slowly proceeded, limited by material and aircraft design, and practical applications weren't realized until the early 20th century. Beginning with steam, to modern designs of pulsejets and compressor-based engines, higher energy fuels also helped to refine engines and widen applications. Aircraft applications began serious testing in the late 1930s, and World War II drove design and testing of higher performance engines and aircraft. By the beginning of the 1960s, both civilian and military aircraft were primarily powered by the jet engine.
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