| Sjöormen-class submarine | |
|---|---|
 RSS Chieftain | |
| Class overview | |
| Builders: | Kockums |
| Operators: |
 Swedish Navy  Republic of Singapore Navy |
| Preceded by: | Draken class |
| Succeeded by: | Näcken class |
| Planned: | 5 |
| Completed: | 5 |
| Active: | 4 |
| Retired: | 1 |
| General characteristics | |
| Displacement: |
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: |
1 shaft 2× Pielstick diesel 1× ASEA electric motor |
| Speed: |
Surfaced: 15 kn (28 km/h; 17 mph) Submerged: 20 kn (37 km/h; 23 mph) |
| Complement: | 23 |
| Sensors and processing systems: | FAS |
| Armament: |
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 submarines were retired by Sweden in the early 1990s. In the late 1990s, four submarines were acquired by the Republic of Singapore Navy and relaunched as the Challenger class following modernisation and tropicalisation.[1][2]
Ships[]
| Ship Name | Builder | Launched | Commissioned | Status |
|---|---|---|---|---|
| HMS Sjöormen | Kockums | 25 Jan 1967 | 31 July 1968 | sold to Singapore as RSS Centurion |
| HMS Sjölejonet | Kockums | 29 June 1967 | 16 Dec 1968 | sold to Singapore as RSS Conqueror |
| HMS Sjöbjörnen | Karskrona Navy yard | 9 Jan 1968 | 28 Feb 1969 | sold to Singapore as RSS Challenger |
| HMS Sjöhunden | Kockums | 21 March 1968 | 25 June 1969 | sold to Singapore as RSS Chieftain |
| HMS Sjöhästen | Karskrona Navy yard | 6 Aug 1968 | 15 Sept 1969 | sold to Singapore as spare parts |
References[]
- Notes
- ↑ "Dr Tan Launches First Submarine in Sweden". Ministry of Defence Singapore. http://www.mindef.gov.sg/imindef/news_and_events/nr/1997/sep/27sep97_nr3.html. Retrieved 2012-12-06.
- ↑ "Submarine Tropicalisation Programme". MINDEF. http://www.mindef.gov.sg/imindef/news_and_events/nr/2001/may/23may01_nr/23may01_fs2.html. Retrieved 2012-12-06.
- Bibliography
- Conway's All the World's Fighting Ships 1947-1995
External links[]
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The original article can be found at Sjöormen-class submarine and the edit history here.