Engineering:Natsushio-class submarine

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JS Fuyushio (SS-524).jpg
JS Fuyushio
Class overview
Name: Natsushio class
Builders:
Operators:  Japan Maritime Self-Defense Force
Preceded by: Hayashio class
Succeeded by: Ōshio class
Built: 1961–1963
In commission: 1963–1978
Planned: 2
Completed: 2
Retired: 2
General characteristics
Type: Coastal attack submarine
Displacement: 690 long tons (701 t) surfaced
Length: 61 m (200 ft 2 in)
Beam: 6.5 m (21 ft 4 in)
Draft: 4.1 m (13 ft 5 in)
Propulsion:
  • Sulzer-Mitsubishi Diesel-electric, 2 shafts
  • 1,350 bhp (1,010 kW) (surfaced)
  • 2,300 shp (1,700 kW) (submerged)
Speed:
  • 12 knots (22 km/h; 14 mph) surfaced
  • 15 knots (28 km/h; 17 mph) submerged
Complement: 43
Armament: 3 × 533 mm (21 in) torpedo tubes

The Natsushio-class submarines were a pair of submarines constructed and operated by the Japan Maritime Self-Defense Force during the Cold War. They were a development of the Hayashio-class submarines and are sometimes considered the same class. They were small and limited in capability but were thought to be a successful class. They entered service in 1963–1964 and were deleted in 1978.

Design and description

The Natsushios were a development of the preceding Hayashio class and are sometimes considered the same class.[1][2][3] They shared many of the same characteristics with small design improvements. They were small submarines with limited capability[1] but considered handy and a successful class.[4] They were air-conditioned and had good habitability for the crews. The submarines measured 61 meters (200 ft 2 in) long overall with a beam of 6.5 m (21 ft 4 in) and a draft of 4.1 m (13 ft 5 in). The submarines had a standard displacement of 780 long tons (790 t), with a surfaced displacement of 690 long tons (700 t) and 850 long tons (860 t) submerged.[1][3]

The vessels were powered by a diesel-electric system. Two shafts were powered by two Sulzer-Mitsubishi diesel engines creating 1,350 brake horsepower (1,010 kW) and two electric motors creating 1,700 shaft horsepower (1,300 kW). This gave the submarines a maximum speed of 12 knots (22 km/h; 14 mph) surfaced and 15 knots (28 km/h; 17 mph) submerged.[1][lower-alpha 1] The Natsushios were armed with three 533-millimeter (21 in) torpedo tubes in the bow. They had a crew of 43.[1]

Boats in class

Natsushio class construction data[1]
Pennant no. Name Laid down Launched Commissioned Fate
SS-523 Natsushio (なつしお) 5 December 1961 18 September 1962 29 June 1963 Deleted 20 March 1978
SS-524 Fuyushio (ふゆしお) 6 December 1961 14 December 1962 17 September 1963 Deleted 20 June 1978

See also

Notes

  1. Blackman[2] and Moore[4] have the submarines' surfaced speed as 11 knots (20 km/h; 13 mph).

Citations

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Gardiner, Chumbley & Budzbon 1995, p. 235.
  2. 2.0 2.1 Blackman 1969, p. 181.
  3. 3.0 3.1 Couhat 1976, p. 243.
  4. 4.0 4.1 Moore 1976, p. 281.

References

  • Blackman, Raymond V. B., ed (1969). Jane's Fighting Ships 1969–70. New York: McGraw-Hill Book Company. OCLC 30910135. 
  • Couhat, Jean Labayle, ed (1976). Combat Fleets of the World 1976/77: Their Ships, Aircraft, and Armament. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-183-8. 
  • Conway's All the World's Fighting Ships 1947–1995. Annapolis, Maryland: Naval Institute Press. 1995. ISBN 1-55750-132-7. 
  • Moore, John, ed (1976). Jane's Fighting Ships 1976–77 (79th ed.). New York: Franklin Watts Incorporated. ISBN 0-531-03261-2.