Black Swan class sloop

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HMS Black Swan
HMS Black Swan
Class overview
Name: Black Swan class
Operators: Royal Navy, Royal Indian Navy
Built: 19381946
In commission: 19391967
Planned: 42
Completed: 13 (original) + 24 (modified)
Cancelled: 5
Lost: 6
General characteristics
Type: Sloop-of-war
Displacement: 1,250 tons original
1,350 tons modified
Length: 299 ft 6 in (91.3 m)
Beam: 37 ft 6 in (11.4 m) original
38 ft 6 in (11.7 m) modified
Draught: 11 ft (3.4 m)
Propulsion: Geared turbines, 2 shafts:
3,600 hp (2.68 MW) (original)
4,300 hp (3.21 MW) (modified)
Speed: 19 knots (35 km/h) (original)
20 knots (37 km/h) (modified)
Range: 7,500 nmi (13,900 km) at 12 kn (22 km/h)
Complement: 180 (original)
192 (modified)
Armament: 6 × 4-inch (102 mm) AA guns (3 × 2)
4 × 2 pdr AA pom-pom
4 × 0.5-inch (12.7 mm) AA (original)
12 × 20 mm Oerlikon AA (6 × 2) (modified)

The Black Swan class and Modified Black Swan class were two classes of sloop of the Royal Navy and Royal Indian Navy. Thirteen Black Swans were launched between 1939 and 1943, including four for the Royal Indian Navy; twenty-four Modified Black Swans were launched between 1942 and 1945, including two for the Royal Indian Navy; another five ships were cancelled in 1945.

Like corvettes, sloops of that period were specialized convoy-defence vessels, with anti-aircraft and anti-submarine capability. They were designed to have a longer range than a destroyer at the expense of a lower top speed, while remaining capable of outrunning surfaced Type VII and Type IX U-boats.

In World War II, Black Swan-class sloops sank 29 U-boats. The most famous sloop commander was Captain Frederic John Walker. His sloop Starling became one of the most successful submarine hunters, taking part in the sinking of eleven U-boats.

After the war, sloops continued in service with the Royal Navy, Egyptian Navy, Indian Navy, Pakistani Navy and the West German Navy. In April 1949, Amethyst was attacked on the Yangtze River by the Communist People's Liberation Army.

Several Black Swan sloops fought in the Korean War.

Contents

[edit] Black Swan class

Royal Navy

The first two ships were built under the 1937 Programme and the second pair under the 1939 Programme. The remaining five RN ships were ordered under the 1940 War Programme; there were incremental improvements as the building developed, and the Woodcock and Wren when completed were practically indistinguishable from the Modified Black Swan Class.

Royal Indian Navy

  • Jumna, built by Denny, launched on 16 November 1940, and completed 13 May 1941. Later used as survey ship, renamed INS Jamuna 1968, paid off at end 1980 and broken up.
  • Sutlej, built by Denny, launched on 1 October 1940, and completed 23 April 1941. Later used as survey ship, paid off at end 1978 and deleted 1982 or 1983.
  • Godavari, built by Thornycroft, Woolston, launched on 21 March 1943, and completed 28 June 1943. Transferred to Pakistan as Sind 1948. Sold for breaking up 2 June 1959.
  • Narbada, built by Thornycroft, launched on 21 December 1942, and completed 29 April 1943. Transferred to Pakistan as Jhelum 1948. Broken up July 1959.

[edit] Modified Black Swan class

Royal Navy

Eleven ships were in the 1940 Supplementary War Programme:

Ten more ships were in the 1941 Programme:

Three more ships were in the 1942 Programme (Snipe and Sparrow had originally been in the 1940 Programme, ordered from John Brown, Clydebank on 21 June 1941, then the order was transferred to Devonport Dockyard 3 March 1942 and finally to Denny on 8 December 1942):

Three more ships were in the 1944 Programme, but all were cancelled 2 November 1945. These had been intended to be further modified and enlarged, with a beam of 38 feet 6 inches (11.7 m):

  • Partridge, ordered from Thornycroft on 9 October 1944.
  • Waterhen, ordered from Denny.
  • Wryneck, ordered from Denny.

Royal Indian Navy

  • Cauvery, built by Yarrow, launched on 15 June 1943, and completed 21 October 1943. Renamed INS Kaveri 1968. Sold 1979.
  • Kistna, built by Yarrow, launched on 22 April 1943, and completed 26 August 1943. Renamed INS Krishna 1968. Paid off at end 1981 and broken up.

[edit] Black Swans sunk or destroyed in combat

[edit] U-boats sunk by Black Swans

[edit] See also