User:DeHooMin/Sandbox/Sjöormen class submarine
 RSS Chieftain
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| Class overview | |
|---|---|
| Builders | Kockums |
| Operators | list error: <br /> list (help) Swedish Navy  Republic of Singapore Navy |
| Preceded by | Draken |
| Succeeded by | Näcken |
| Planned | 5 |
| Completed | 5 |
| Active | 4 |
| Retired | 1 |
| General characteristics | |
| Displacement | list error: <br /> list (help) Surfaced: 1,125 t (1,107 long tons; 1,240 short tons) Submerged: 1,400 t (1,400 long tons; 1,500 short tons) |
| Length | 50 m (164 ft 1 in) |
| Beam | 6.1 m (20 ft 0 in) |
| Draught | 5.1 m (16 ft 9 in) |
| Propulsion | list error: <br /> list (help) 1 shaft 2× Pielstick diesel 1× ASEA electric motor |
| Speed | list error: <br /> list (help) Surfaced: 15 kn (28 km/h; 17 mph) Submerged: 20 kn (37 km/h; 23 mph) |
| Complement | 23 |
| Sensors and processing systems | FAS |
| Armament | list error: <br /> list (help) 4× 533 mm (21 in) Torpedo tubes 2× 400 mm (16 in) Torpedo tubes Mines |
The Sjöormen class were a group of submarines built for the Swedish Navy in the late 1960s. They had a teardrop shape and were capable of diving to 150m. 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 ships were retired by Sweden in the early 1990s.
Sale to Singapore[edit]
Four of the ships were sold to Singapore in 1996 and modernised in the late 1990s by Kockums. Various modifications were required to suit the boats to tropical waters. A comprehensive tropicalisation programme was carried out for all four submarines, which involved installing air conditioning, marine growth protection systems and corrosion-resistant piping. As of 2010[update], they are currently in service with the Republic of Singapore Navy as the Challenger class.
Ships[edit]
| Ship | Builder | Launched | Commissioned | Status |
|---|---|---|---|---|
| Sjöormen / Centurion | Kockums | 25 Jan 1967 | 31 July 1968 | In Service with Singapore Navy |
| Sjölejonet / Conqueror | Kockums | 29 June 1967 | 16 Dec 1968 | In Service with Singapore Navy |
| Sjöbjörnen / Challenger | Karskrona Navy yard | 9 Jan 1968 | 28 Feb 1969 | In Service with Singapore Navy |
| Sjöhunden / Chieftain | Kockums | 21 March 1968 | 25 June 1969 | In Service with Singapore Navy |
| Sjöhästen | Karskrona Navy yard | 6 Aug 1968 | 15 Sept 1969 | Sold to Singapore in 1995 used for spare parts |
References[edit]
- Notes
- Bibliography
- Conway's All the World's Fighting Ships 1947-1995
External links[edit]
 Swedish Navy | |
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| Republic of Singapore Navy Challenger class |
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