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Wikipedia

Colt Mk 12 cannon

The Colt Mk 12 is a 20 mm autocannon that was widely used by the United States Navy after World War II.

Colt Mk 12
Mk 12 cannon of a RNZAF Douglas A-4K Skyhawk.
TypeAutocannon
Place of originUnited States
Service history
In service1950s – present
WarsVietnam War, Falklands War, Gulf War
Production history
DesignerColt's Manufacturing Company
ManufacturerColt's Manufacturing Company
Specifications
Mass46.0 kg (101.4 lb)

Cartridge20×110mm USN
Caliber20 mm (0.787 in)
ActionGas-operated reloading
Rate of fire1,000 rpm
Muzzle velocity1,010 m/s (3,300 ft/s)

Development edit

The Mk 12 was an advanced derivative of the wartime Hispano HS 404 that was used on French, British and some American fighter aircraft during World War II. It used a lighter projectile with a bigger charge for better muzzle velocity and higher rate of fire at the cost of hitting power. It entered U.S. Navy and U.S. Marine Corps service in the mid-1950s, replacing the earlier M3 cannon.[1]

In service, the Mk 12 proved less than satisfactory. Although its muzzle velocity and rate of fire were acceptable, it was inaccurate and frequently unreliable. Pilots of the F-8 Crusader over North Vietnam, in particular, appreciated the presence of the cannon, but jams and stoppages were common, especially following hard dogfighting maneuvers.

Nevertheless, the Mk 12 was standard cannon armament on gun-armed American naval fighters and attack aircraft from the early 1950s to the early 1970s, including the F4D Skyray, F3H Demon, A-4 Skyhawk, F-8 Crusader, F-11 Tiger and early navy versions of the LTV A-7 Corsair II.

International customers of the A-4 Skyhawk, F-8 Crusader, and the A-7 Corsair II also used the Mk 12 cannon: Argentina, Australia, Brazil, France, Kuwait, Malaysia, New Zealand, the Philippines and Portugal. The only exceptions were Israel and Singapore. The Israeli Air Force replaced the Mk 12 cannon with the French 30 mm DEFA cannon (a revolver design) in its Skyhawks, while the Republic of Singapore Air Force fitted the British 30 mm ADEN cannon (another revolver). Indonesia later bought some used A-4s from Israel.

As of 2013, the Mk 12 cannon is still in use in Skyhawks of the Argentine Air Force and the Brazilian Navy.

See also edit

Citations edit

  1. ^ Williams, p. 327

Bibliography edit

  • Williams, Anthony G. (2022). Autocannon: A History of Automatic Cannon and Their Ammunition. Marlborough, UK: Crowood Press. ISBN 978-1-78500-920-4.

colt, cannon, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, february, 202. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Colt Mk 12 cannon news newspapers books scholar JSTOR February 2024 Learn how and when to remove this template message The Colt Mk 12 is a 20 mm autocannon that was widely used by the United States Navy after World War II Colt Mk 12Mk 12 cannon of a RNZAF Douglas A 4K Skyhawk TypeAutocannonPlace of originUnited StatesService historyIn service1950s presentWarsVietnam War Falklands War Gulf WarProduction historyDesignerColt s Manufacturing CompanyManufacturerColt s Manufacturing CompanySpecificationsMass46 0 kg 101 4 lb Cartridge20 110mm USNCaliber20 mm 0 787 in ActionGas operated reloadingRate of fire1 000 rpmMuzzle velocity1 010 m s 3 300 ft s This article s lead section may be too short to adequately summarize the key points Please consider expanding the lead to provide an accessible overview of all important aspects of the article August 2023 Contents 1 Development 2 See also 3 Citations 4 BibliographyDevelopment editThe Mk 12 was an advanced derivative of the wartime Hispano HS 404 that was used on French British and some American fighter aircraft during World War II It used a lighter projectile with a bigger charge for better muzzle velocity and higher rate of fire at the cost of hitting power It entered U S Navy and U S Marine Corps service in the mid 1950s replacing the earlier M3 cannon 1 In service the Mk 12 proved less than satisfactory Although its muzzle velocity and rate of fire were acceptable it was inaccurate and frequently unreliable Pilots of the F 8 Crusader over North Vietnam in particular appreciated the presence of the cannon but jams and stoppages were common especially following hard dogfighting maneuvers Nevertheless the Mk 12 was standard cannon armament on gun armed American naval fighters and attack aircraft from the early 1950s to the early 1970s including the F4D Skyray F3H Demon A 4 Skyhawk F 8 Crusader F 11 Tiger and early navy versions of the LTV A 7 Corsair II International customers of the A 4 Skyhawk F 8 Crusader and the A 7 Corsair II also used the Mk 12 cannon Argentina Australia Brazil France Kuwait Malaysia New Zealand the Philippines and Portugal The only exceptions were Israel and Singapore The Israeli Air Force replaced the Mk 12 cannon with the French 30 mm DEFA cannon a revolver design in its Skyhawks while the Republic of Singapore Air Force fitted the British 30 mm ADEN cannon another revolver Indonesia later bought some used A 4s from Israel As of 2013 the Mk 12 cannon is still in use in Skyhawks of the Argentine Air Force and the Brazilian Navy See also editM39 cannonCitations edit Williams p 327Bibliography editWilliams Anthony G 2022 Autocannon A History of Automatic Cannon and Their Ammunition Marlborough UK Crowood Press ISBN 978 1 78500 920 4 Retrieved from https en wikipedia org w index php title Colt Mk 12 cannon amp oldid 1203043102, wikipedia, wiki, book, books, library,

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