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The M51 SLBM is a submarine-launched ballistic missile, built by Airbus Defence & Space, and deployed with the French Navy. Designed to replace the M45 SLBM (In French terminology the MSBS - ''Mer-Sol-Balistique-Stratégique'' “Sea-ground-Strategic ballistic”), it was first deployed in 2010. Each missile carries six to ten independently targetable TN 75 thermonuclear warheads. The three-stage engine of the M51 is directly derived from the solid propellant boosters of Ariane 5. The missiles are a compromise over the M5 SLBM design, which was to have a range of and carry 10 new generation Tête nucléaire océanique' (“Oceanic nuclear warhead”) MIRVs.〔(【引用サイトリンク】url=http://www.globalsecurity.org/wmd/world/france/m-5.htm )〕 Design work on the M5 started in 1992, before the programme was renamed the M51 in 1996, when development costs decreased by 20 percent. The M51 entered service in 2010.〔(【引用サイトリンク】url=http://www.astrium.eads.net/en/programme2/m-51-juy.html )〕 == Development == After having spent €5 billion ($6.7 billion) developing the missile, the French government placed a €3 billion ($3.9 billion) order with EADS SPACE Transportation for the M51 in December 2004. The contract covered serial production of the M51 for 10 years, with the company to be responsible for sustained readiness support throughout the missile's life. The M51 performed its first flight test (unarmed) on 9 November 2006 from the French missile flight test centre in Biscarrosse (Landes). The target was reached twenty minutes later, in the north-west of the Atlantic Ocean.〔 (Le Monde — Test réussi pour le M51, futur missile nucléaire à longue portée français )〕 A second and third successful test were carried out on 21 June 2007〔 (Second successful launch of the M51 missile ), press release of the French ministry of Defence〕 and 13 November 2008.〔 (Third M51 missile experimental launch ), French ministry of Defence〕 On 27 January 2010, at 9h25, a missile was launched underwater by ''Le Terrible'', from Audierne Bay.〔(Un missile M-51 a été tiré depuis un sous-marin en plongée ce matin ), Jean-Dominique Merchet, ''Libération''〕 The missile reached its target 2,000 kilometres off South Carolina; the 4,500 kilometre flight took less than 20 minutes.〔(Le missile M-51 est retombé à 2000 kilomètres des côtes américaines ), Jean-Dominique Merchet, ''Libération''〕〔(Tir d’essai du missile M51 ), Ministry of Defence〕 The 10 July 2010 test validated the ''Triomphant'' class submarine's capacity to launch the M51 in operational conditions. On 5 May 2013, an M51 flight test missile failed after being fired by a submerged SSBN off the coast of Brittany. This was the first failed launch of the M51 after 5 successful launches since 2006. On 30 September 2015, a M51 was successfully test-flown from a land-based missile site near Biscarrosse to a desolate target in the North Atlantic. 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「M51 (missile)」の詳細全文を読む スポンサード リンク
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