| Oerlikon 20 Mm Cannon |
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The Oerlikon 20 mm cannon is an Autocannon designed by Reinhold Becker in 1914 . It is still in use today, after having been used extensively during the Second World War . HISTORY The German Army was the first user, mounting it on its aircraft during the First World War . In 1919 , the Patent was transferred to Switzerland , and production assumed by Semag, later bought by Werkzeug Maschinenfabrik Oerlikon. Most of the main parties of the Second World War bought licenses to manufacture the cannon themselves. In 1935 , the cannon was adapted by Britain to be used in the Royal Navy for the short-range Anti-aircraft role. It was fielded in United States Navy ships starting in 1942 . It came to be famous in this role, notably against Japanese '' Kamikaze '' attacks during the Pacific War . The gun was eventually abandoned as a major anti-air weapon due to its lack of stopping power against heavy aircraft, largely superseded by the Bofors 40mm. It is still in use today on some naval units, theoretically as a last-recourse anti-air weapon, but mainly used for police shots ( Warning Shot s or incapaciting shots). The Polsten gun was based on the Oerlikon. DESCRIPTION The Oerlikon 20 mm cannon is a monotube cannon with a large coil around it. In its naval version, it is fixed on a mount, and a flat armor shield gives some protection for the crew. The cannon is manned by the gunner (who aims and fires the piece), the piece chief (designating objectives), and the feeder (supplying fresh ammunition). The gun is manoeuvered by the gunner, who is attached to the weapon. The fire is directed through an optical visor, the same as used on the Bofors 40 Mm Gun . Ammunition feed is by a cylindrical magazine on the top of the gun. A trigger in the right-hand grip controls fire. Used cartridges are ejected from below the breech. SEE ALSO |
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