Bofors 57 mm Naval Automatic Gun L/60 (Swedish: 57 mm sjöautomatkanon L/60 (57 mm SAK 60)),[1][2] also known as 57 mm/60 (2.25") SAK Model 1950[3] and the like (full English product name: Bofors 57 mm Automatic A.A. Gun L/60 In Stabilized Twin Turret),[4] was a twin-barreled 57 mm (2.2 in) caliber fully automaticdual purpose naval artillery piece designed by the Swedisharms manufacturerBofors from the early of the 1940s to the early 1950s to meet a request from the Dutch Navy.[1] Besides the Dutch Navy, the weapon was also adopted by the Swedish and the French Navy, most predominantly by the latter.[3]
Bofors 57 mm Naval Automatic Gun L/60
Swedish Bofors 57 mm SAK 60 (57 mm akan m/50) on the destroyer HSwMS Småland
The Bofors 57 mm Naval Automatic Gun L/60 is at its core a scaled up version of the famous Bofors 40 mm Automatic Gun L/70, but constructed as a twin-gun system sharing the same receiver/mantle with ammunition feeding from the sides into each gun.[1] The guns were water-cooled and fed by large 80-cartridge magazines that allowed several long bursts to be fired without reloading.[3]
French "57mm/60 modèle 1951" on display at Port-Louis naval museum.
French "57mm/60 modèle 1951" on display at Port-Louis naval museum.
The Dutch were the initial users of the Bofors 57 mm Naval Automatic Gun L/60. As part of rebuilding the Dutch Navy post World War II, the Dutch Navy had requested several naval gun systems to be developed by Bofors for their next generation of naval-vessels,[5] one being a twin-barreled 57 mm dual-purpose gun for the planned De Zeven Provinciën-classcruisersHNLMS De Ruyter and De Zeven Provinciën.[1] This request led to the creation of the Bofors 57 mm Naval Automatic Gun L/60, which entered active service with the Dutch Navy in 1953 mounted on the cruisers De Ruyter and De Zeven Provinciën.
Use in the Swedish NavyEdit
Swedish 57 mm akan m/50 on the destroyer HSwMS Småland
Following the Dutch example, the Swedish navy decided to acquire the new 57 mm system for a new generation of destroyers in 1950. In Swedish service the weapon was fitted to the Halland-classdestroyersHSwMS Halland and Småland, both of which entered service in 1956.[1] The weapon was initially designated 57 mm automatkanon m/50 (57 mm akan m/50),[6] meaning "57 mm autocannon m/50", but around 1970 the weapon was redesignated to 57 mm torndubbelautomatpjäs m/50 (57 mm tdblapjäs m/50),[7][8] meaning "57 mm turret double automatic piece m/50" (literal).
The gun was in use until the Halland-class destroyers were taken out of service.
The Bofors 57 mm L/60 naval gun was also purchased by the French Navy and came to serve on a number of naval-vessels under the designation 57mm/60 modèle 1951 (57mm/60 mle 51) from 1952 onward, although primarily post 1956.[3] The French navy version of the system featured a French designed naval mount that maintained the system in mechanical equilibrium, even when firing.[3] The French mounting was some 8 tons lighter than the Dutch/Swedish version.[citation needed]
In French service the gun notably armed light escorts as main guns and larger ships as secondary guns. The following French ships were armed with the 57mm/60 mle 51 system:[3]
^ abcde. tfd.chalmers.se. Archived from the original on 2007-07-01. Retrieved 2021-09-14.
^"030306_SAK57_Mk3.pdf" (PDF). boflv.se. Bofors Luftvärnsförening (Bofors Anti-Aircraft Association). 2003. (PDF) from the original on 2010-09-11. Retrieved 2021-11-19.
^ abcdef"57 mm/60 Modèle 1951 on NavWeaps.com". navweaps.com. from the original on 2016-08-19. Retrieved 2021-11-19.
^Bofors (in Swedish). Karlskoga, Sweden: AB Bofors, Karlskoga (Boforskoncernen). 1958. p. 87.
^. tfd.chalmers.se. Archived from the original on 2007-05-18. Retrieved 2021-11-19.
^Amreg Fl, Ammunitionsregister för flottan, 1955 (in Swedish). Stockholm, Sweden: Ammunitionssektionen, Marinförvaltningens Artilleribyrå. 1955.
^Amreg Marinen, Ammunitionsregister för marinen, 1962, ändringar 1965 (in Swedish). Stockholm, Sweden: Kungliga Marinförvaltningen. 1965.
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57 mm/60 Modèle 1951 on NavWeaps.com
October 23, 2023
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Not to be confused with Bofors 57 mm Naval Automatic Gun L 70 Bofors 57 mm Naval Automatic Gun L 60 Swedish 57 mm sjoautomatkanon L 60 57 mm SAK 60 1 2 also known as 57 mm 60 2 25 SAK Model 1950 3 and the like full English product name Bofors 57 mm Automatic A A Gun L 60 In Stabilized Twin Turret 4 was a twin barreled 57 mm 2 2 in caliber fully automatic dual purpose naval artillery piece designed by the Swedish arms manufacturer Bofors from the early of the 1940s to the early 1950s to meet a request from the Dutch Navy 1 Besides the Dutch Navy the weapon was also adopted by the Swedish and the French Navy most predominantly by the latter 3 Bofors 57 mm Naval Automatic Gun L 60Swedish Bofors 57 mm SAK 60 57 mm akan m 50 on the destroyer HSwMS SmalandTypeNaval GunPlace of originSwedenService historyIn service1952 1990Used byDutch NavySwedish NavyFrench NavyProduction historyDesigned1950ManufacturerBoforsProduced1950SpecificationsMassTraversing mass 24 t 53 000 lb Barrel length60 calibres 3 420 m Crew8Shell57 438 mm R m 50 Shell weight2 6 kgCalibre57 mmElevation 9 90 30 sTraverse 360 30 sRate of fire2 130 rounds minMuzzle velocity850 920 m sEffective firing range13000 metres max 5000 metres practical 5500 meters AA ceiling Contents 1 Design 2 Use in the Dutch Navy 3 Use in the Swedish Navy 4 Use in the French Navy 5 See also 6 References 6 1 Notes 6 2 External linksDesign EditThe Bofors 57 mm Naval Automatic Gun L 60 is at its core a scaled up version of the famous Bofors 40 mm Automatic Gun L 70 but constructed as a twin gun system sharing the same receiver mantle with ammunition feeding from the sides into each gun 1 The guns were water cooled and fed by large 80 cartridge magazines that allowed several long bursts to be fired without reloading 3 nbsp French 57mm 60 modele 1951 on display at Port Louis naval museum nbsp French 57mm 60 modele 1951 on display at Port Louis naval museum Use in the Dutch Navy Edit nbsp Dutch Bofors 57 mm SAK 60 on the cruiser HNLMS De Ruyter The Dutch were the initial users of the Bofors 57 mm Naval Automatic Gun L 60 As part of rebuilding the Dutch Navy post World War II the Dutch Navy had requested several naval gun systems to be developed by Bofors for their next generation of naval vessels 5 one being a twin barreled 57 mm dual purpose gun for the planned De Zeven Provincien class cruisers HNLMS De Ruyter and De Zeven Provincien 1 This request led to the creation of the Bofors 57 mm Naval Automatic Gun L 60 which entered active service with the Dutch Navy in 1953 mounted on the cruisers De Ruyter and De Zeven Provincien Use in the Swedish Navy Edit nbsp Swedish 57 mm akan m 50 on the destroyer HSwMS SmalandFollowing the Dutch example the Swedish navy decided to acquire the new 57 mm system for a new generation of destroyers in 1950 In Swedish service the weapon was fitted to the Halland class destroyers HSwMS Halland and Smaland both of which entered service in 1956 1 The weapon was initially designated 57 mm automatkanon m 50 57 mm akan m 50 6 meaning 57 mm autocannon m 50 but around 1970 the weapon was redesignated to 57 mm torndubbelautomatpjas m 50 57 mm tdblapjas m 50 7 8 meaning 57 mm turret double automatic piece m 50 literal The gun was in use until the Halland class destroyers were taken out of service Use in the French Navy Edit nbsp Two French Le Normand class frigates fitted with 57mm 60 mle 51 turrets on the bow The Bofors 57 mm L 60 naval gun was also purchased by the French Navy and came to serve on a number of naval vessels under the designation 57mm 60 modele 1951 57mm 60 mle 51 from 1952 onward although primarily post 1956 3 The French navy version of the system featured a French designed naval mount that maintained the system in mechanical equilibrium even when firing 3 The French mounting was some 8 tons lighter than the Dutch Swedish version citation needed In French service the gun notably armed light escorts as main guns and larger ships as secondary guns The following French ships were armed with the 57mm 60 mle 51 system 3 The battleship Jean Bart 1952 retrofit The anti aircraft cruiser De Grasse The anti aircraft cruiser Colbert Le Normand class frigates T 47 class fleet escorts also known as the Surcouf class T 53 class fleet escortsSee also EditBofors 57 mm Automatic Anti Aircraft Gun L 60 single gun anti air development of the Bofors 57 mm Naval Automatic Gun L 60 Bofors 57 mm Naval Automatic Gun L 70 single gun replacement design for the Bofors 57 mm Naval Automatic Gun L 60 Bofors 120 mm Automatic Gun L 50References EditNotes Edit a b c d e Bofors automatic 57mm Dual Purpose guns tfd chalmers se Archived from the original on 2007 07 01 Retrieved 2021 09 14 030306 SAK57 Mk3 pdf PDF boflv se Bofors Luftvarnsforening Bofors Anti Aircraft Association 2003 Archived PDF from the original on 2010 09 11 Retrieved 2021 11 19 a b c d e f 57 mm 60 Modele 1951 on NavWeaps com navweaps com Archived from the original on 2016 08 19 Retrieved 2021 11 19 Bofors in Swedish Karlskoga Sweden AB Bofors Karlskoga Boforskoncernen 1958 p 87 120 mm Bofors naval guns tfd chalmers se Archived from the original on 2007 05 18 Retrieved 2021 11 19 Amreg Fl Ammunitionsregister for flottan 1955 in Swedish Stockholm Sweden Ammunitionssektionen Marinforvaltningens Artilleribyra 1955 Amreg Marinen Ammunitionsregister for marinen 1962 andringar 1965 in Swedish Stockholm Sweden Kungliga Marinforvaltningen 1965 AMKAT Ammunitionskatalog Data och bilder Marinen 1977 ars utgava in Swedish Stockholm Sweden Swedish Defence Materiel Administration FMV 1977 External links Edit nbsp Wikimedia Commons has media related to Bofors 57 mm 60 naval gun 57 mm 60 Modele 1951 on NavWeaps com Bofors automatic 57mm Dual Purpose guns Retrieved from https en wikipedia org w index php title Bofors 57 mm Naval Automatic Gun L 60 amp oldid 1177855126, wikipedia, wiki, book, books, library,
