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Engines

1987 Flight Readiness Firing of Discovery's main engines is successfully 1985 Flight readiness firing of Atlantis' main engines; 20 seconds 1984 Flight readiness firing of Discovery's main engines 1983 2nd flight readiness firing of Challenger's main engines; 22 seconds 1982 Flight readiness firing of Challenger's main engines; 20 seconds 1981 Flight readiness firing of Columbia's main engines; 20 seconds 1938 GM began mass production of diesel engines 1912 1st U.S. submarines with diesel engines commissioned, Groton, Connecticut

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