HSwMS ''Södermanland'' (J21) was the second ship of the .

Design

Due to time and cost, HSwMS ''Östergötland'', like the other ships in the class, was built largely according to the drawings of the ''Öland''-class destroyer. The length of the ship was 111.8 meters and the

beam Beam may refer to: Streams of particles or energy *Light beam, or beam of light, a directional projection of light energy **Laser beam *Radio beam *Particle beam, a stream of charged or neutral particles **Charged particle beam, a spatially lo ...

was 11.2 meters. Due to different equipment, however, the new vessels became about 200 tons heavier, which gave a

draft Draft, the draft, or draught may refer to: Watercraft dimensions * Draft (hull), the distance from waterline to keel of a vessel * Draft (sail), degree of curvature in a sail * Air draft, distance from waterline to the highest point on a v ...

of 3.7 meters, against the ''Öland''-class of 3.4 meters. The machinery consisted of two oil-fired

steam boilers Steam is water vapor, often mixed with air or an aerosol of liquid water droplets. This may occur due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization. Saturated or superheated steam is inv ...

of the

Babcock & Wilcox Babcock & Wilcox Enterprises, Inc. is an American energy technology and service provider that is active and has operations in many international markets with its headquarters in Akron, Ohio. Historically, the company is best known for their stea ...

brand, which supplied steam with a pressure of 32 bars to two steam turbines of the

DeLaval DeLaval is a producer of dairy and farming machinery, with a head office in Tumba, Sweden, and is part of the Tetra Laval group. The company has 18 factories worldwide, employs over 4,500 people. History From the 1870s Gustaf de Laval (1845–19 ...

brand, which in turn each operated a

propeller A propeller (often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working flu ...

. The machinery gave the effect 47,000

horsepower Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are t ...

on the axles, which gave a top speed of 35

knots A knot is a fastening in rope or interwoven lines. Knot or knots may also refer to: Other common meanings * Knot (unit), of speed * Knot (wood), a timber imperfection Arts, entertainment, and media Films * ''Knots'' (film), a 2004 film * ''Kn ...

. The main guns consisted of four 120 mm (4.7 in) guns m/44 placed in two double towers, one on the foredeck and one on the aft deck. From the beginning, the air defense consisted of seven 40 mm automatic cannons w / 48 E. These were placed two for the superstructure, one on each side amidships, and three on the aft bridge. Around 1965, the middle cannon on the aft bridge was replaced by the

anti-aircraft missile Anti-aircraft missiles are guided missiles designed to destroy or damage aircraft. These include * air-to-air missile, a missile fired from an aircraft for the purpose of destroying another aircraft * subsurface-to-air missile, a missile usually l ...

Robot 07, and to increase the stability of the ship, the two cannons were removed at the same time amidships. For the same reason, all six

torpedo tube A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...

s were also placed in a tube rack, having previously stood in two racks. There were also two submarine bombers and 58 mines on board.

History

''Södermanland'' was built at

Götaverken Götaverken was a Swedish shipbuilding company that was located on Hisingen, Gothenburg. It was founded in 1841, and ceased building ships in 1989. History The company was founded in 1841 by Scottish businessman Alexander Keiller (Gothenburg), Ale ...

Gothenburg Gothenburg ( ; ) is the List of urban areas in Sweden by population, second-largest city in Sweden, after the capital Stockholm, and the fifth-largest in the Nordic countries. Situated by the Kattegat on the west coast of Sweden, it is the gub ...

and was launched on 28 May 1956 in which her

sea trial A sea trial or trial trip is the testing phase of a watercraft (including boats, ships, and submarines). It is also referred to as a "shakedown cruise" by many naval personnel. It is usually the last phase of construction and takes place on op ...

took place in 1957 and commissioned on 27 June 1958. In the case of the ''Södermanland'', unlike her sister ship ''

Hälsingland Hälsingland (), sometimes referred to by the Latin name Helsingia, is a historical Provinces of Sweden, province or ''landskap'' in central Sweden. It borders Gästrikland, Dalarna, Härjedalen, Medelpad and the Gulf of Bothnia. It is part of ...

'',

Eriksbergs Mekaniska Verkstad Eriksbergs Mekaniska Verkstads AB was a Swedish shipbuilding company based in Gothenburg. It was founded in 1850 by Christian Barchman under the name ''Ericsbergs metall och tackjerns-gjuteri''. It delivered its last ship in 1979. History Intr ...

just built the hull, with completion and

fitting out Fitting out, or outfitting, is the process in shipbuilding that follows the float-out/launching of a vessel and precedes sea trials. It is the period when all the remaining construction of the ship is completed and readied for delivery to her o ...

done by Kockums Mekaniska Verkstads AB. The reasons for this are unclear, though it may possibly have been part of a work share agreement. ''Södermanland'' was decommissioned on 1 July 1982 and sold in 1985 for scrapping in

Spain Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Eur ...

References

Notes

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External links

{{DEFAULTSORT:Södermanland Östergötland-class destroyers Ships built in Gothenburg 1956 ships