20mm Oerlikon cannons

20mm Oerlikon cannons are a type of autocannon that originated in Switzerland and were widely used by various countries, including the United States, United Kingdom, and Canada, during World War II. The design of the 20mm Oerlikon cannons was influenced by the work of Reinhold Becker, a German engineer who developed the 20mm Becker cannon, and was later improved upon by the Oerlikon company. The 20mm Oerlikon cannons saw extensive use on warships, such as the USS Enterprise (CV-6) and HMS King George V, as well as on aircraft, including the Supermarine Spitfire and North American P-51 Mustang. The cannons were also used by Allied forces, including the Royal Air Force and the United States Army Air Forces, during the North African Campaign and the Battle of Normandy.

● Introduction

The 20mm Oerlikon cannons were designed to provide a high rate of fire and a large muzzle velocity, making them effective against aircraft and small boats. The cannons were used by various countries, including the United States Navy, the Royal Navy, and the Imperial Japanese Navy, during World War II. The 20mm Oerlikon cannons were often used in conjunction with other anti-aircraft guns, such as the Bofors 40mm gun and the QF 3.7-inch AA gun, to provide a layered defense against air attacks. The cannons were also used on land, such as during the Battle of El Alamein and the Battle of Stalingrad, where they were used to defend against ground attacks by the Wehrmacht and the Red Army. The 20mm Oerlikon cannons were praised by Winston Churchill and Dwight D. Eisenhower for their effectiveness in combat.

● Design and Development

The design of the 20mm Oerlikon cannons was influenced by the work of Reinhold Becker and the Oerlikon company. The cannons used a gas-operated mechanism and had a muzzle velocity of over 2,700 feet per second. The 20mm Oerlikon cannons were designed to be lightweight and compact, making them easy to install on warships and aircraft. The cannons were also designed to be highly reliable and required minimal maintenance, making them popular among military forces. The 20mm Oerlikon cannons were tested by the United States Navy at the Naval Proving Ground in Dahlgren, Virginia and were found to be highly effective against aircraft and small boats. The cannons were also used by the Royal Air Force during the Battle of Britain and were praised by Hugh Dowding and Keith Park for their effectiveness.

● Operational History

The 20mm Oerlikon cannons saw extensive use during World War II, particularly in the Pacific Theater and the European Theater. The cannons were used by the United States Navy during the Battle of Midway and the Battle of Guadalcanal, where they were effective against Japanese aircraft and warships. The 20mm Oerlikon cannons were also used by the Royal Navy during the Battle of the Atlantic and the Battle of the Mediterranean, where they were effective against German and Italian U-boats and warships. The cannons were used by the Soviet Union during the Battle of Stalingrad and the Battle of Kursk, where they were effective against German tanks and aircraft. The 20mm Oerlikon cannons were also used by the Chinese Nationalist Army during the Second Sino-Japanese War and were praised by Chiang Kai-shek for their effectiveness.

● Variants

There were several variants of the 20mm Oerlikon cannons, including the Oerlikon FF and the Oerlikon FFL. The Oerlikon FF was a naval version of the cannon, while the Oerlikon FFL was a land-based version. The Oerlikon FF was used by the United States Navy and the Royal Navy, while the Oerlikon FFL was used by the United States Army and the British Army. The 20mm Oerlikon cannons were also used by other countries, including Australia, Canada, and South Africa, during World War II. The cannons were used on various aircraft, including the Supermarine Spitfire, the North American P-51 Mustang, and the Mitsubishi A6M Zero. The 20mm Oerlikon cannons were praised by George S. Patton and Bernard Montgomery for their effectiveness in combat.

● Specifications

The 20mm Oerlikon cannons had a caliber of 20mm and a muzzle velocity of over 2,700 feet per second. The cannons had a rate of fire of over 450 rounds per minute and a maximum range of over 5,500 yards. The 20mm Oerlikon cannons were designed to be lightweight and compact, making them easy to install on warships and aircraft. The cannons were also designed to be highly reliable and required minimal maintenance, making them popular among military forces. The 20mm Oerlikon cannons were used by various countries, including the United States, United Kingdom, and Canada, during World War II and were praised by Winston Churchill and Dwight D. Eisenhower for their effectiveness in combat. The cannons were also used by the Royal Air Force during the Battle of Britain and were praised by Hugh Dowding and Keith Park for their effectiveness. The 20mm Oerlikon cannons were tested by the United States Navy at the Naval Proving Ground in Dahlgren, Virginia and were found to be highly effective against aircraft and small boats.

Category:World War II weapons