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The Gatling gun is a gunpowder field weapon invented in the 1860s which used multiple rotating barrels turned by a hand crank. Unlike earlier weapons, such as the Mitrailleuse , which had limited capacity and long reloading times, the Gatling gun was reliable, easy to load, and had a high firing rate. The gun was designed by the American inventor Richard J. Gatling , in 1861 and patented in 1862 . The Gatling gun may have been the first " Machine Gun ", depending on how 'machine gun' is defined, as it was capable of firing continuous bursts of fire. Unlike designs like the Maxim Gun , which operate the mechanism using a fraction of the power of the fired cartridge, the Gatling gun relies on external power, such as a hand crank, or motor. Some time later, Gatling-type weapons diverted gas from the barrels to spin the rotating barrels. The term Gatling gun is used to refer to modern rotating-barrel cannons such as 20mm M61 Vulcan Autocannon . HISTORY 1865 .]] Gatling's intent in inventing the gun was actually to save lives. He knew that in the American Civil war, many soldiers died simply from malnutrition. He thought that if he could make a gun that made one soldier as effective as many, armies could be much smaller. He felt that this would make it easier to supply armies with food. Although the Gatling gun was designed in 1861 during the U.S. Civil War, in 1862, the U.S. government decided not to purchase any of the weapons, because the firing mechanism lacked triggers and because the Gatling guns were far too heavy to be set up quickly in combat. Even with design improvements, the Gatling gun still lacked a trigger and weighed an unwieldy 90 lb (41 kg). However, Union General Benjamin Butler bought twelve and used them on the Petersburg front. During its debut in combat soldiers on both sides were awestruck by its power and destructive effect. They were only put into limited service late in the war by the Union Army. The British Royal Navy installed fixed Gatling guns on its warships, and US forces used them in the Indian Wars . During the Japanese Boshin War (1868-1869), Gatling guns were used in land battles and mounted on ships to repel boarders. During the Franco-Prussian War of 1870-1871, Gatling guns were used by the French armies fighting in the provinces, to replace the defective Mitrailleuse . The Naval Brigade s serving during the Anglo-Zulu War of 1879 used Gatling guns in several battles. Gatling guns were used during the British Bombardment of Alexandria in 1882. Gatling guns were used by the US side during the Spanish-American War , most notably during the Battle Of San Juan Hill . {Link without Title} MODERN GATLING GUNS After Gatling guns were replaced by lighter, cheaper blowback-style weapons, the approach of using multiple rotating barrels fell into disuse for many decades. However, Gatling gun-style weapons made a return in the 1940–50s, when weapons with very high rate of fire were needed in military Aircraft such as the Lockheed AC-130 gunship and ship-based CIWS . For these modern rotating-barrel cannons, Electric Motor s were used to rotate the barrel. , Korea , by Japanese troops, in 1876 .]] One of the main reasons for the resurgence of the Gatling gun-style design is the rotating barrel weapon's tolerance for continuous high-volume rates of fire. For example, if 2000 rounds were fired non-stop at high rate from a conventional single-barrel weapon, this would likely result in overheating of the barrel or a jam in the weapon. In contrast, a five-barreled Gatling gun-style weapon firing 2000 rounds would fire 400 rounds per barrel, an acceptable Rate Of Fire . The M61 Vulcan 20 mm cannon is the most commonly-used member of a family of weapons designed by General Electric and currently manufactured by General Dynamics . It is a six-barrelled Gatling capable of more than 6,000 rounds per minute, a rate unachievable with a conventional machine gun. Similar systems are available ranging from 5.56 mm to 30 mm (there was even a 37 mm Gatling on the Prototype T249 'Vigilante' AA platform), the rate-of-fire being somewhat inversely-proportional to the size and mass of the ammunition (which also determines the size and mass of the barrels). During the Vietnam War , the 7.62 mm calibre M134 Minigun was created as a helicopter weapon. Able to fire 6,000 rounds a minute from a 4,000-round linked Belt , the Minigun proved to be one of the most effective non-explosive projectile weapons ever built and is still used in helicopters today. When used in Vietnam, the Minigun was nicknamed " Puff The Magic Dragon " because it fired red tracers that gave the appearance of breathing fire. They are also used with lethal effectiveness on USAF , as the gun platform circles a target at night. Gatling gun of an A-10 Thunderbolt II at Osan Air Base , Korea.]] In addition to the benefits mentioned above, many modern systems have the advantage of being externally-driven (as opposed to relying on the energy from fired cartridges). This increases their reliability, as cartridge firing failure will not interrupt the operation cycle. Additionally, certain other stoppages, such as faulty extraction and many feeding-related problems, are eliminated or reduced considerably due to the external power source. It should however be noted that, although complex mechanically and uncommon, modern systems that derive power from the ammunition do exist. The world's fastest Gatling-style weapon, the 10,000 RPM GSh-6-23 uses a gas-operated drive system. SEE ALSO EXTERNAL LINKS
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