World Library  
Flag as Inappropriate
Email this Article

Colt Mk 12 cannon

Article Id: WHEBN0001081604
Reproduction Date:

Title: Colt Mk 12 cannon  
Author: World Heritage Encyclopedia
Language: English
Subject: Convair F2Y Sea Dart, ST Aerospace A-4SU Super Skyhawk, McDonnell F3H Demon, Douglas A-4 Skyhawk, Vought F-8 Crusader
Publisher: World Heritage Encyclopedia

Colt Mk 12 cannon

Colt Mk 12
Mk 12 cannon of a RNZAF Douglas A-4K Skyhawk.
Type Autocannon
Place of origin United States
Service history
In service 1950s – present
Wars Vietnam War, Falklands War, Gulf War
Weight 46.0 kg (101.4 lb)

Cartridge 20×110mm USN
Caliber 20 mm (0.787 in)
Action Gas-operated reloading
Rate of fire 1,000 rpm
Muzzle velocity 1,010 m/s (3,300 ft/s)

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


The Mk 12 was an advanced derivative of the wartime Hispano HS 404 that had been used on 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.

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 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 exception 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, 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

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.