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
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