20 mm caliber is a specific size of popular autocannon ammunition. The dividing line between smaller-caliber weapons, commonly called "guns", from larger-caliber "cannons" (e.g. machine gun vs. autocannon), is conventionally taken to be the 20 mm round, the smallest caliber of …

The Oerlikon 20 mm cannon is a series of autocannons based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II .

The cannon is also referred to as Birkigt type 404, after its designer Marc Birkigt and later versions based on British development are known as 20 mm Hispano. [2] Firing a 20 mm calibre projectile, it delivered a significant load of explosive from a relatively light weapon.

Apr 17, 2013 · A third of Japanese aircraft shot down during WWII met their demise courtesy of the German designed, Swiss perfected, American built 20mm Oerlikon cannon.

Mar 18, 2019 · Developed in the final days of World War I, Germany sold the rights to a 20 mm caliber cannon to a Swiss firm that eventually became the Oerlikon 20 mm. The weapon proved popular, and before the start of World War II, numerous countries obtained the …

The 20mm caliber is a specific size of cannon or autocannon ammunition. There are few weapons (aside from shotguns and large game hunting rifles) which have been built that fire projectiles between .50 caliber (0.50 inches/12.7 mm, roughly 13 …

Widely used by many nations, this 20 mm automatic weapon originally designed by the Swiss firm of Oerlikon was probably produced in higher numbers than any other AA weapon of World War II. In 1937 the British Admiralty initiated tests to find a weapon suitable for arming merchant ships and minor warships against close range air attacks.

Flak 20mm navy; Field cannon FK20-2; KraKa; Naval mount S20. 20 mm x 128 KAE. The KAE is the ideal cannon for modern remote weapon stations. It is based on the proven and widely used KAA design, and incorporates an electrical trigger device and a cannon control unit. In addition to the standard 1,000 rds/min burst mode, the operator can select ...

Mar 30, 2011 · The Oerlikon 20mm anti-aircraft cannon was widely used by naval and air forces during World War II, by countries on both sides. It is a fairly well-recognized weapons, with a characteristic offset 60-round drum magazine.

The M61 Vulcan is a hydraulically, electrically, or pneumatically driven, six- barrel, air-cooled, electrically fired Gatling-style rotary cannon which fires 20 mm × 102 mm (0.787 in × 4.016 in) rounds at an extremely high rate (typically 6,000 rounds per minute).