Oerlikon 20mm

Ask emerged as cannon dual employment ( antitank and antiaircraft ) was sold to several countries before the war, including Brazil, where he was the base of the 1st unit of flak in the country. On land, it was already obsolete at the beginning of the war, but the sea has long been used both as main armament of anti-aircraft or small boats on the larger vessels by both allies and axis for taking great success - the only U.S. manufactured 124,735 of these guns, since they could not buy them in Switzerland. It was also adapted as a weapon of aircraft with less success in this role. Its still in use today by some countries, like the U.S.A, where they are used by the U.S Coast Guards.

History
As the 40-mm Bofors gun this gun was also by almost all the World War II participating nations used. It was designed in 1914 by the German Reinhold Becker, but got the patent in 1919, the Swiss company Semager. Later Semager of Oerlikon accepted. Oerlikon from this gun was marketed all over the world. It has been improved and produced in many countries. Probably the Oerlikon anti-aircraft guns, the most produced Anti-aircraft gun in the Second World War. In the USA 124 735 copies were produced and one billion rounds of ammunition. From other countries no precise figures are known.

The Oerlikon anti-aircraft guns was regarded as a reliable, robust and simple construction, which was easy to maintain. In the Second World War, she shot from December 1941 to September 1944 32 percent of all shot by the U.S. Army from Japanese hunters. In 1944 she was replaced with the Allies gradually by the 40 -mm Bofors, as the Bofors gun in action against enemy aircraft scored significantly greater damage effects. Because of the Kamikaze-planes of the Japanese, this was increasingly important.

In 1939, this very simplified Flak Poland produced. They managed to bring the plans before the German occupation of England. There she was under the name Polsten-Gun produced. Even today, many armies use this anti-aircraft gun.

Specifications

 * Model: U.S. 20mm/70 Mark 2
 * Caliber: 20 mm L/70O0ERLIKONAA.jpg
 * Length: 2.21 m ( total) and 1.4 m ( pipe)
 * Weight: 769 Kg
 * Elevation: -5 º to +87 º
 * Conteiro: 360
 * Charger: Snail, with 60 cartridges
 * Ammunition: Projectile high - explosive ( HE) with contact fuze (weight: 123 g )
 * Initial Speed: 835 m / sec.
 * Range: 4390 m ( horizontal), 3048 m ( ceiling - maximum)
 * Rate of Fire: 450 rounds per minutes
 * Garrison: 3 (1 scorer / shooter and two had ammunition )