|
Archer-class Submarine
The ''Archer-class'' submarines are a class of two diesel-electric submarines in active service with the Republic of Singapore Navy (RSN). Originally launched as the Swedish Navy submarines HSwMS ''Hälsingland'' and HSwMS ''Västergötland'' in 1986 and 1987, the two submarines were sold to Singapore in November 2005 and relaunched in June 2009 and October 2010 respectively after extensive modernisation by Kockums, which included a refit to standards, the insertion of a new hull section with an air independent propulsion system, and additional climatisation for use in tropical waters. History Singapore's Ministry of Defence (MINDEF) signed an agreement with Kockums for the supply of two ''Archer''-class (formerly ''Västergötland''-class) submarines to the RSN on 4 November 2005. More than 20 years old and previously in reserve with the Swedish Navy, the submarines were transferred to the RSN on completion of the modernisation and conversion for operation in tropical water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kockums
Saab Kockums AB is a shipyard headquartered in Malmö, Sweden, owned by the Swedish defence company Saab Group. Saab Kockums AB is further operational in Muskö, Docksta, and Karlskrona. While having a history of civil vessel construction, Kockums' most renowned activity is the fabrication of military corvettes and submarines. Kockums worked with Northrop Grumman and Howaldtswerke-Deutsche Werft (HDW) to offer a ''Visby''-class corvette derivative in the American Focused Mission Vessel Study, a precursor to the Littoral Combat Ship program. It competed with several other concepts, including Norway's Skjold class (part of a Raytheon led group). History Kockums during the 19th century During the 1820:s the Kockums family established themselves as businesspeople in Malmö. Frans Henrik Kockum built a large fortune through an investment in tobacco production. Thanks to this he was able to purchase a large part of land 1838 south of Malmö, and between 1840 and 1841 he erect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sjöormen-class Submarine
The ''Sjöormen'' class (''Sea serpent'') was a class of submarines built for the Swedish Navy in the late 1960s. They had a teardrop hull shape and were capable of diving to . At the time of their deployment they were regarded as one of the most advanced non-nuclear submarine-classes in the world, incorporating many new features including x-rudder and anechoic tiles. Both speed and underwater endurance was at this time very high for a conventional submarine. The submarines were retired by Sweden in the early 1990s. In the late 1990s, four submarines were acquired by the Republic of Singapore Navy (RSN) and relaunched as the following modernisation and tropicalisation. Description As built, the ''Sjöormen'' class were designed with a teardrop hull shape, based on the United States' . They had bow planes on the sail and their stern diving planes were configured in a x-shape. They had a standard displacement of and when dived. The submarines had a waterline length of and a le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine Classes
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Submarines are referred to as ''boats'' rather than ''ships'' irrespective of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and they were adopted by several navies. They were first widely used during World War I (1914–1918), and are now used in many navies, large and small. Military uses include attacking enemy surface ships (merchant and military) or other submarines, and for aircraft carrier protection, blockade running, nuclear deterrence, reconnaissance, conventional land attack (for example, using a cruise missile), and covert insertion of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Submarine Classes In Service
The list of submarine classes in service includes all submarine classes currently in service with navies or other armed forces worldwide. For surface combatants, see the list of naval ship classes in service. Ballistic missile submarines Cruise missile submarines Nuclear-powered attack submarines Non-nuclear attack submarines with air-independent propulsion (AIP) * ** Builder: ** Displacement: 1,725 tons ** Operators: *** : 3 in service * ** Builder: , ** Displacement: 1,800 tons ** Operators: : 2 building * (Dolphin-2; AIP-variant) ** Builder: ** Displacement: 1,900 tons ** Operator: : 3 AIP in-service/sea trials, 3 AIP ordered * ** Builder: , ** Displacement: 1,647 tons ** Operators: : 3 in service * ''Qing''-class submarine **Builder: ** Displacement: 6,628 tons ** Operator: : 1 in service * ** Builder: ** Displacement: 3,426 tons ** Operator: : 1 on sea trials; 3 more building * ** Builder: / ** Displacement: 1,590 tons ** ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air-independent Propulsion
Air-independent propulsion (AIP), or air-independent power, is any marine propulsion technology that allows a non-nuclear submarine to operate without access to atmospheric oxygen (by surfacing or using a snorkel). AIP can augment or replace the diesel-electric propulsion system of non-nuclear vessels. Modern non-nuclear submarines are potentially stealthier than nuclear submarines; although some modern submarine reactors are designed to rely on natural circulation, most naval nuclear reactors use pumps to constantly circulate the reactor coolant, generating some amount of detectable noise. Non-nuclear submarines running on battery power or AIP, on the other hand, can be virtually silent. While nuclear-powered designs still dominate in submergence times, speed, range and deep-ocean performance; small, high-tech non-nuclear attack submarines can be highly effective in coastal operations and pose a significant threat to less-stealthy and less-maneuverable nuclear submarines. AIP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stirling Engine
A Stirling engine is a heat engine that is operated by the cyclic compression and expansion of air or other gas (the ''working fluid'') between different temperatures, resulting in a net conversion of heat energy to mechanical work. More specifically, the Stirling engine is a closed-cycle regenerative heat engine with a permanent gaseous working fluid. ''Closed-cycle'', in this context, means a thermodynamic system in which the working fluid is permanently contained within the system, and ''regenerative'' describes the use of a specific type of internal heat exchanger and thermal store, known as the ''regenerator''. Strictly speaking, the inclusion of the regenerator is what differentiates a Stirling engine from other closed-cycle hot air engines. In the Stirling engine, a gas is heated and expanded by energy supplied from outside the engine's interior space (cylinder). It is then shunted to a different location within the engine, where it is cooled and compressed. A piston (o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HSwMS Västergötland (Vgd)
HSwMS ''Västergötland'' (Vgd) was the lead ship of the s, named after Västergötland, Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on .... The submarine was Ceremonial ship launching, launched on 19 July 1986 and entered service with the Swedish Navy on 20 October 1988. ''Västergötland'' served with the Swedish Navy until 1997 when the submarine was Ship decommissioning, decommissioned. In 2005 ''Västergötland'' and sister boat were sold to Singapore, where ''Västergötland'' was renamed RSS ''Swordsman'' and entered service on 30 April 2013. Development The submarine design combined the best properties from the preceding and es. Submarines of the ''Västergötland'' class had greater submarine hunting capacity than previous classes, partly due to the fact that t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HSwMS Hälsingland (Hgd)
HSwMS ''Hälsingland'' (Hgd), was the second submarine of the . The vessel was named after Hälsingland, Sweden. The submarine was launched on 31 August 1987 and entered service with the Swedish Navy on 20 October 1988. ''Hälsingland'' served with the Swedish Navy until 1997 when the submarine was decommissioned. In 2005 ''Hälsingland'' and sister boat were sold to Singapore, where ''Hälsingland'' was renamed RSS ''Archer'' and entered service on 2 December 2011. ''Archer'' remains in service. Development The submarine design combined the best properties from the preceding Swedish and es. Submarines of the ''Västergötland'' class had greater submarine hunting capacity than previous classes, partly due to the fact that they were equipped with a new modern submarine torpedo. The submarines in the ''Västergötland'' class were able to fire up to six heavy and six light wire-guided torpedoes at the same time against different targets, a world record of perhaps dubious benef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
