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Titan rocket : ウィキペディア英語版 | Titan (rocket family)
Titan is a family of U.S. expendable rockets used between 1959 and 2005. A total of 368 rockets of this family were launched, including all the Project Gemini manned flights of the mid-1960s. Titans were part of the American intercontinental ballistic missile deterrent until the late 1980s, and lifted other American military payloads as well as civilian agency intelligence-gathering satellites. Titans also were used to send highly successful interplanetary scientific probes throughout the Solar System. ==Titan I== (詳細はTitan I was the first version of the Titan family of rockets. It began as a backup ICBM project in case the Atlas was delayed. It was a two-stage rocket whose LR-87 engine was powered by RP-1 and liquid oxygen. It was operational from early 1962 to mid-1965. The ground guidance for the Titan was the Unisys ATHENA computer, designed by Seymour Cray, based in a hardened underground bunker.〔Stakem, Patrick H. The History of Spacecraft Computers from the V-2 to the Space Station, 2010, PRB Publishing, ASIN B004L626U6〕 Using radar data, it made course corrections during the burn phase.
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