|
The Borei class ((ロシア語:Борей); sometimes transliterated as Borey, also known as the ''Dolgorukiy'' class after the name of the lead vessel, ) is the new class of nuclear-powered ballistic missile submarine produced by Russia and operated by the Russian Navy, while the Yasen-class submarine is the new Russian attack submarine. The class is intended to replace the Delta III, Delta IV and classes now in Russian Navy service. The class is named after Boreas, the North wind. Despite being a replacement for many types of submarines, the Borei-class submarines are somewhat smaller than the Typhoon-class in terms of length ( as opposed to ) and crew (107 people). These changes were in part designed to reduce the cost to build and maintain the submarines. == History and description == The first design work was laid down in mid-1980s and the build of the first unit of the Borei class (officially designated "Project 955") started in 1996. (A short-lived, smaller parallel design appeared in the mid-1980s was designated Project 935 Borei II) A new submarine-launched ballistic missile was developed in parallel, called the R-39UTTH "Bark". However, the work on this missile was abandoned, and a new missile called the Bulava was designed. The submarine needed to be redesigned to accommodate the new missile, and the project name was changed to Project 955. The vessels are being built at the Northern Machinebuilding Enterprise (Sevmash) in Severodvinsk, and were designed by the Rubin Marine Equipment Design Bureau (Rubin). Because of the repeated failures during Bulava test launches, some experts have suggested that the Borei submarine could instead be armed with R-29RMU Sineva missiles. The Sineva is already in active duty on the Delta IV-class submarine. Advances include a compact and integrated hydrodynamically efficient hull for reduced broadband noise and the first ever use of pump-jet propulsion on a Russian nuclear submarine.〔(Russian Borei Class Submarine ) 〕 The Borei submarines are approximately long, in diameter, and has a maximum submerged speed of at least . They are equipped with a floating rescue chamber designed to fit in the whole crew. Smaller than the Typhoon class, the Boreis were initially slated to carry 12 missiles but are able to carry four more due to the decrease in mass of the 36-ton Bulava SLBM (a modified version of the Topol-M ICBM) over the originally proposed R-39UTTH Bark. Cost is some 23 billion (USD$890 million), in comparison the cost of an SSBN was around USD$2 billion per boat (1997 prices). A fifth generation successor/supplement is already in development. 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「Borei-class submarine」の詳細全文を読む スポンサード リンク
|