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SuperDraco is a hypergolic propellant liquid rocket engine designed and built by SpaceX. It is part of SpaceX's Draco family of rocket engines. A redundant array of eight SuperDraco engines provides fault-tolerant propulsion for use as a launch escape system and also propulsive-landing thrust for the Dragon V2 passenger-carrying space capsule. SuperDraco rocket engines utilize a storable (non-cryogenic) propellant which allows the engines to be fired many months after fueling and launch. The engines will be used on crew transport flights to low Earth orbit, and are also projected to be used for entry, descent and landing control of the proposed Red Dragon robotic probe to Mars. SuperDracos will be used on both the Dragon V2 crew- and cargo-transporting space capsule as well as on the DragonFly suborbital test rocket, a prototype low-altitude reusable rocket that will be used for flight testing various aspects of the propulsive-landing technology. While the engine is capable of of thrust, during use for DragonFly testing, the engines will be throttled to to maintain vehicle stability. == History == On February 1, 2012 SpaceX announced that it had completed the development of a new, more powerful version of a storable-propellant rocket engine, this one called ''SuperDraco''. This high-thrust hypergolic engine—about 200 times larger than the Draco RCS thruster hypergolic engine—offers deep throttling ability,〔 and just like the Draco thruster, was designed to provide multiple restart capability and use the same shared hypergolic propellants as Draco. Its primary purpose was to be for SpaceX's LAS (launch abort system) on the Dragon spacecraft. According to a NASA press release, the engine has a transient from ignition to full thrust of 100 ms. During launch abort, eight SuperDracos were expected to fire for 5 seconds at full thrust. The development of the engine was partially funded by NASA's CCDev 2 program. Name: Draco comes from the Greek drakōn for dragon. Draco (constellation) is a constellation (the Dragon) in the polar region of the Northern Hemisphere near Cepheus and Ursa Major. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SuperDraco」の詳細全文を読む スポンサード リンク
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