Source: YouTube
Monday, December 21, 2009
Soryu Class
The Soryu class boats have larger displacement than any previous Japanese submarines since the WWIIThe Soryu class is a new class of Japanese diesel-powered attack submarines. It evolved from Oyashio class design. The first boat, named after Japanese Imperial Navy aircraft carrier Soryu, will be commissioned in 2009. Translated from Japanese it means Blue Dragon. The JMSDF plans to operate at least five of these submarines.
The Soryu class boats are significantly larger than Oyashios. Furthermore these submarines have a larger displacement than any previous Japanese submarines since the World War II.
It can be distinguished from the Oyashio class by the X-shape rudders. Such rudder configuration was first used on the Swedish Gotland class. It is computer aided and provides the submarine with extreme maneuverability. It also enables to operate very close to seabed.
Submarines have hydrodynamic design and are fitted with anechoic coating. Interior also has sound isolation of loud components.
The Soryu class submarines are armed with six 533-mm torpedo tubes for the Type 89 torpedoes and UGM-84 Harpoon missiles. Boats have high automation in combat systems.
Theses vessels are powered by a Swedish Stirling air-independent propulsion system. The Soryu is significantly larger than Oyashio class boats, in order to incorporate this propulsion system. This system is license-produced by Kawasaki Heavy Industries. It allows to stay submerged for longer periods of time without surfacing to charge the batteries. Submerged endurance is increased from days to weeks. It also enhanced vessel's stealth and operational capabilities.
The AIPS develops 3 900 hp surfaced and 8 000 hp submerged. Power is delivered through one shaft.
The Soryu class boats are significantly larger than Oyashios. Furthermore these submarines have a larger displacement than any previous Japanese submarines since the World War II.
It can be distinguished from the Oyashio class by the X-shape rudders. Such rudder configuration was first used on the Swedish Gotland class. It is computer aided and provides the submarine with extreme maneuverability. It also enables to operate very close to seabed.
Submarines have hydrodynamic design and are fitted with anechoic coating. Interior also has sound isolation of loud components.
The Soryu class submarines are armed with six 533-mm torpedo tubes for the Type 89 torpedoes and UGM-84 Harpoon missiles. Boats have high automation in combat systems.
Theses vessels are powered by a Swedish Stirling air-independent propulsion system. The Soryu is significantly larger than Oyashio class boats, in order to incorporate this propulsion system. This system is license-produced by Kawasaki Heavy Industries. It allows to stay submerged for longer periods of time without surfacing to charge the batteries. Submerged endurance is increased from days to weeks. It also enhanced vessel's stealth and operational capabilities.
The AIPS develops 3 900 hp surfaced and 8 000 hp submerged. Power is delivered through one shaft.
| Entered service | expected in 2009 |
| Crew | 65 men |
| Diving depth (operational) | ? |
| Diving depth (maximum) | ? |
| Sea endurance | ? |
| Dimensions and displacement | |
| Length | 84 m |
| Beam | 9.1 m |
| Draught | 8.5 m |
| Surfaced displacement | 2 900 tons |
| Submerged displacement | 4 200 tons |
| Propulsion and speed | |
| Surfaced speed | 13 knots |
| Submerged speed | 20 knots |
| Diesel engines | 1 x 3 900 / 8 000 hp |
| Electric motors | ? |
| Armament | |
| Missiles | UGM-84 Harpoon launched form torpedo tubes |
| Torpedoes | 6 x 533-mm torpedo tubes for Type 89 torpedoes |
Source: Military-Today
Thursday, December 17, 2009
Vietnam Agrees to Buy Subs, Planes From Russia
MOSCOW - Vietnam and Russia signed a major arms deal and a nuclear energy agreement Dec. 15, a sign of reviving ties between Moscow and its former Soviet-era ally in Southeast Asia.
Hanoi agreed to buy Russian-made submarines and aircraft in the arms deal, which was signed in the presence of Russian Prime Minister Vladimir Putin and his visiting Vietnamese counterpart, Nguyen Tan Dung."Vietnam signed a contract for the purchase of submarines, planes and military equipment with the corresponding cooperation of the Russian side," Dung said in remarks translated into Russian.
Details were not released on the deal between Russian state-owned arms exporter Rosoboronexport and Vietnam's defense ministry.
However the Interfax news agency, citing an unnamed defense industry source, reported that Vietnam had agreed to buy six Russian-made submarines for a total price tag of about $2 billion (1.37 billion euros).
The six Kilo-class diesel-electric subs would be built for the Vietnamese navy at a rate of one per year, Interfax reported.
Moscow and Hanoi also inked a deal on the construction of Vietnam's first atomic power plant.
Last month, the Vietnamese parliament approved building the country's first nuclear power station, a lucrative project that has been keenly watched by potential foreign partners.
The agreement signed in Moscow was described as a memorandum on cooperation between Vietnamese electricity company EVN and Russia's state-owned atomic energy firm Rosatom, which had been interested in the project.
"Vietnam officially invites the Russian side to cooperate in the building of the first atomic energy plant in Vietnam under adherence to the necessary conditions," Dung said.
Source: (Defense News) via Defense Studies
Thursday, December 10, 2009
Shishumar Class
In December 1981 the Indian government reached an agreement with Howaldtswerke-Deutsche Werft, a German organization based in Kiel, for a four-section contract covering four conventional submarines of the Type 1500 variant of the very successful boats of the U-206 class. The four-part contract covered the construction in Germany of an initial pair of submarines of the Shishumar class, packages of equipment and components for the building of another two boats by the Mazagon Dock Ltd. of Mumbai (Bombay), the training of specialized design and construction personnel employed by Mazagon, and the provision of logistical support and consultation services during the manufacture and early service of the boats. In 1984 it was announced that another two boats would be built at Mazagon, giving the Indian navy a total of six Shishumar-class submarines, but this scheme was overtaken in the later part of the decade by changes in the thinking of the Indian navy, and in 1988 it was revealed that the arrangement with Howaldtswerke would end with the completion of the fourth boat.
The decision was reviewed 1992 and 1997, and in 1999 the Indian navy decided to move ahead with its Project 75 for the Indian construction of three submarines of the French Scorpene class design.
The four Shishumar boats are the Shishumar, Shankush, Shalki and Shankul. Built in Germany the first two boats were laid down in May and September 1982 for launching in December and May 1984 and completion in September and November 1986, while the last two boats, built in India, were laid down in June 1984 and September 1989 for launching in September 1989 and March 1992 and completion in February 1992 and May 1994.
The submarines are basically conventional with a single central bulkhead, their most notable operational features being the provision of an IKL-designed escape system. This latter comprises an integrated escape sphere able to accommodate the entire 40-man crew. This sphere can withstand the same pressure as the hull, has its own eight-hour air supply, and is outfitted for short term survival and communications.
The eight torpedo tubes are all grouped in the bows, and provision is made for the embarkation of six reload torpedoes. The standard weapon for these tubes is an German torpedo, the AEG SUT, which is a wire-guided weapon with active/passive onboard terminal guidance. The weapon carries a 250-kt (551-lb) HE warhead, and its two primary capabilities in terms of range and speed are 28 km (17.4 miles) at 23 kts and 12 km (7.5 miles) at 35 kts. The fifth and sixth boats were to have been completed with provision for the carriage and firing of anti-ship missiles, but the existing boats lack this facility. They do have, however, provision for the addition of external strap-on carriers.
The Shishumar started a mid-life refit in 1999, with the other boats following in order of completion, and improvements that may be retrofitted are French Eledone sonar and an Indian action data system.
The decision was reviewed 1992 and 1997, and in 1999 the Indian navy decided to move ahead with its Project 75 for the Indian construction of three submarines of the French Scorpene class design.
The four Shishumar boats are the Shishumar, Shankush, Shalki and Shankul. Built in Germany the first two boats were laid down in May and September 1982 for launching in December and May 1984 and completion in September and November 1986, while the last two boats, built in India, were laid down in June 1984 and September 1989 for launching in September 1989 and March 1992 and completion in February 1992 and May 1994.
The submarines are basically conventional with a single central bulkhead, their most notable operational features being the provision of an IKL-designed escape system. This latter comprises an integrated escape sphere able to accommodate the entire 40-man crew. This sphere can withstand the same pressure as the hull, has its own eight-hour air supply, and is outfitted for short term survival and communications.
The eight torpedo tubes are all grouped in the bows, and provision is made for the embarkation of six reload torpedoes. The standard weapon for these tubes is an German torpedo, the AEG SUT, which is a wire-guided weapon with active/passive onboard terminal guidance. The weapon carries a 250-kt (551-lb) HE warhead, and its two primary capabilities in terms of range and speed are 28 km (17.4 miles) at 23 kts and 12 km (7.5 miles) at 35 kts. The fifth and sixth boats were to have been completed with provision for the carriage and firing of anti-ship missiles, but the existing boats lack this facility. They do have, however, provision for the addition of external strap-on carriers.
The Shishumar started a mid-life refit in 1999, with the other boats following in order of completion, and improvements that may be retrofitted are French Eledone sonar and an Indian action data system.
| Entered service | 1986 |
| Crew | 40 men |
| Diving depth (operational) | 260 m |
| Dimensions and displacement | |
| Length | 64.4 m |
| Beam | 6.5 m |
| Draught | 6 m |
| Surfaced displacement | 1 660 tons |
| Submerged displacement | 1 850 tons |
| Propulsion and speed | |
| Surfaced speed | 11 knots |
| Submerged speed | 22 knots |
| Diesel engines | 4 x 2 415 hp |
| Electric motors | 1 x 4 600 hp |
| Armament | |
| Torpedoes | 8 x 533-mm for 14 torpedoes |
| Mines | ground mines in place of the torpedoes |
Sources: Military Today
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