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Falcon Heavy (FH), previously known as the Falcon 9 Heavy, is a heavy lift space launch vehicle being designed and manufactured by SpaceX. The Falcon Heavy is a variant of the Falcon 9 v1.1 launch vehicle and will consist of a standard Falcon 9 rocket core, with two additional strap-on boosters derived from the Falcon 9 first stage.〔 This will increase the low Earth orbit (LEO) payload to about 53 tonnes, compared to about 13 tonnes for a Falcon 9 v1.1. Due to the Falcon 9 CRS-7 failure investigation, the first launch is now expected in 2016.〔 == History == At a press conference at the National Press Club in Washington, DC. on 5 April 2011, Elon Musk stated, “Falcon Heavy will carry more payload to orbit or escape velocity than any vehicle in history, apart from the Saturn V moon rocket, which was decommissioned after the Apollo program. This opens a new world of capability for both government and commercial space missions.” SpaceX originally announced that the Falcon Heavy demonstration rocket would arrive at its west-coast launch location, Vandenberg Air Force Base, California, before the end of 2012,〔 with a launch planned for 2013.〔 After early launches from Vandenberg, the first launch from the Cape Canaveral east coast launch complex was planned for late 2013 or 2014.〔 By late 2012, the company modified the planned first launch date to 2013.〔 〕 Originally, the first launch from the east-coast Cape Canaveral launch complex was planned for 2013, but it is currently scheduled for 2015 with the STP-2 US Air Force payload.〔 〕 While the initial specifications of the new launcher in April 2011 projected LEO payloads of up to 〔 and GTO payloads up to ,〔 later reports in 2011 projected higher payloads beyond low Earth orbit, including to geostationary transfer orbit,〔(【引用サイトリンク】url=http://www.spacex.com/downloads/spacex-brochure.pdf )〕 to translunar trajectory, and on a trans-Martian orbit to Mars.〔(【引用サイトリンク】url=http://www.spacex.com/multimedia/videos.php?id=60 )〕 By late 2013, SpaceX raised the projected GTO payload for Falcon Heavy to up to . The Falcon Heavy falls into the "super heavy-lift" range of launch systems under the classification system used by a NASA human spaceflight review panel.〔 (HSF Final Report: Seeking a Human Spaceflight Program Worthy of a Great Nation ), October 2009, ''Review of U.S. Human Spaceflight Plans Committee'', p. 64-66: "5.2.1 The Need for Heavy Lift ... require a “super heavy-lift” launch vehicle ... range of 25 to 40 mt, setting a notional lower limit on the size of the super heavy-lift launch vehicle if refueling is available ... this strongly favors a minimum heavy-lift capacity of roughly 50 mt ..."〕 SpaceX states that the Falcon Heavy will be able to deliver more usable payload to orbit than any launch vehicle since the Saturn V (1967–1973);〔 In April 2015, SpaceX sent the "U.S. Air Force an updated letter of intent April 14 outlining a certification process for its Falcon Heavy rocket to launch national security satellites." The process includes three successful flights of the Falcon Heavy including two consecutive successful flights, and states that Falcon Heavy can be ready to fly national security payloads by 2017. , the SpaceX manifest has five Falcon Heavy launches listed, but does not show specific dates.〔 〕 By September 2015, and after a loss-of-mission event on Falcon 9 Flight 19 in June 2015, SpaceX rescheduled the maiden Falcon Heavy flight for April or May 2016.〔 〕 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「Falcon Heavy」の詳細全文を読む スポンサード リンク
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