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Encyclopedia > Skysweeper
Skysweeper anti-aircraft gun in firing position
Skysweeper anti-aircraft gun in firing position

Skysweeper, technically Gun, M51, Antiaircraft, was an American 75 mm anti-aircraft gun deployed in the early 1950s. It was the first such gun to combine all of the various systems needed for effective use against high-speed aircraft into a single carriage, namely radar, an analog computer for calculating "lead", and an autoloader for high-speed fire. Skysweeper anti-aircraft gun File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Skysweeper anti-aircraft gun File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... American troops man an anti-aircraft gun near the Algerian coastline in 1943 Anti-aircraft, or air defense, is any method of combating military aircraft from the ground. ... 155 mm M198 howitzer USS Iowa (BB-61) fires a full broadside of nine 16/50 and six 5/38 guns during a target exercise near Vieques Island, Puerto Rico, 1 July 1984. ... The examples and perspective in this article or section may not represent a worldwide view. ... Airbus A380 An aircraft is any machine capable of atmospheric flight. ... This long range radar antenna, known as ALTAIR, is used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on the Kwajalein atoll[1]. Radar is a system that uses radio waves to detect, determine the distance of, and map, objects such... A page from the Bombardiers Information File (BIF) that describes the components and controls of the Norden bombsight. ... An Autoloader is a data storage device consisting of at least one tape drive (the drive), a method of loading tapes into the drive (the robot), and a storage area for tapes (the magazine). ...


Anti-aircraft guns naturally fall into several categories, each for a different altitude and speed requirement. High-altitude targets require very large guns to get the needed power into the shell to reach those altitudes, but at the same time have the advantage of not needing to move very fast because at that range the change in angle of the target was small – consider the seemingly slow motion of an airliner at cruise altitude. At very low altitudes there were only seconds in which to react, so a hand-swung weapon was the only possibility, no matter how inaccurate. This left an intermediate altitude at which a small gun could not be used because the range to the aircraft was too far, and a larger gun could not be used because the targets were moving too fast. Altitude is the elevation of an object from a known level or datum. ... Speed (symbol: v) is the rate of motion, or equivalently the rate of change of position, expressed as distance d moved per unit of time t. ...


During World War II the US Army filled this intermediate-range niche with the almost-universal Bofors 40 mm gun equipped with a US version of the Kerrison Predictor. But even by the end of the war the performance and accuracy of newer bombers demanded a much higher performance system that was able to attack targets at longer ranges. The Army eventually formulated the definitive requirements; a new gun was needed to defeat aircraft flying at 1,000 mph (1,600 km/h) at altitudes up to 20,000 feet (6 km). Above that the existing radar-equipped WWII-era 90 mm and 120 mm guns would continue to serve well, with the 120 mm able to reach as high as 80,000 ft (24 km). Combatants Allies: Poland, United Kingdom, Soviet Union, France/Free France, United States, China, Canada, India, Australia, New Zealand, South Africa, Greece, Norway, Honduras, and others Axis Powers: Germany, Italy, Japan, Bulgaria, Finland, Romania, Hungary, Burma, Slovakia Casualties Military dead: 17 million Civilian dead: 33 million Total dead: 50 million Military... To meet Wikipedias quality standards, this article or section may require cleanup. ... Bofors 40mm/L60. ... The Kerrison Predictor was one of the first fully-automated anti-aircraft predictors, fire control systems which would attempt to predict the correct aim at a plane based on simple inputs like the observed speed and angle to the target. ... A bomber is a military aircraft designed to attack ground targets, primarily by dropping bombs. ...


Development of what would become the Skysweeper started in 1948. A new 75 mm gun, known as the T83E1 or M35, was developed that had excellent muzzle velocity, along with two ten-round revolver-type magazines and an auto-loader that allowed it to reach 45 rounds/minute – about the same as the much lighter Bofors had managed. This was mounted on a large box-shaped powered traverse, which also mounted the computer and manual gunsights on the right side, and the T-38 radar unit on the left. The T-38 radar had a range of about 30 km [1] and could track aircraft travelling at up to 700 mph (1100 km/h). 1948 (MCMXLVIII) was a leap year starting on Thursday (the link is to a full 1948 calendar). ... A guns muzzle velocity is the speed at which the projectile leaves the muzzle of the gun. ...


Deployment started in the early 1950s and a number were rushed to Korea. Field units used the system widely, although its size meant it was largely static and was primarily used for airbase defense. It proved to be an excellent system and was found in various places until the early 1970s. Combatants Western Allied/UN combatants: South Korea, United States, United Kingdom Communist combatants: North Korea, Peoples Republic of China, Soviet Union Commanders Douglas MacArthur Kim Il-sung, (Peng Dehuai de facto) Strength Note: All figures may vary according to source. ... The 1970s decade refers to the years from 1970 to 1979, inclusive. ...


Skysweeper was also integrated with the massive anti-aircraft systems under the command of Army's Anti-Aircraft Command (ARAACOM) in the US. Most ARAACOM deployments were around cities and used the 90 mm and 120 mm guns, but the Skysweeper was used near targets that would have to be attacked by low-altitude aircraft. However the development of missile systems like the Nike Ajax meant that the days of the anti-aircraft gun were soon over, and in 1957 the ARAACOM started to dramatically reduce the number of guns in favour of a much smaller number of missile sites. By the end of the year only three Skysweeper battalions remained in the US, one at Sault Ste. Marie, Michigan to protect the Soo Locks, two at Savannah River, plus one 90mm and two Skysweeper battalions at Thule, Greenland. These too were removed by 1959. Launch of a Nike Zeus missile Project Nike was a US Army project, proposed in May 1945 by Bell Labs, to develop a line-of-sight anti-aircraft missile system. ... 1957 (MCMLVII) was a common year starting on Tuesday of the Gregorian calendar. ... Sault Ste. ... A Soo Lock vacant of ships The Sault Locks (usually called the Soo Locks) allow ships to travel between Lake Superior and the lower Great Lakes. ... For the Department of Energy facility, see Savannah River Site The Savannah River is a major river in the southeastern United States, forming most of the border between the states of South Carolina and Georgia. ... Map of Greenland Qaanaaq (pron. ... 1959 (MCMLIX) was a common year starting on Thursday of the Gregorian calendar. ...


General characteristics

  • Caliber: 75 mm
  • Barrel length: 4500 mm
  • Maximum range: 13.5 km
  • Effective range: 6.3 km

External links

  • The M51 in service with the Japanese self defense force

  Results from FactBites:
 
aircraft, targets, started, reach, early, could, various, small, mounted, missile, large, battalions, about - ... (662 words)
Skysweeper, technically Gun, M51, Antiaircraft, was an American 75 mm anti-aircraft gun deployed in the early 1950s.
Skysweeper was also integrated with the massive anti-aircraft systems under the command of Army's Anti-Aircraft Command (ARAACOM) in the US.
Dieser Artikel basiert auf dem Artikel Skysweeper aus der freien Enzyklo.
Skysweeper - Wikipedia, the free encyclopedia (604 words)
Skysweeper, technically Gun, M51, Antiaircraft, was an American 75 mm anti-aircraft gun deployed in the early 1950s.
It was the first such gun to combine all of the various systems needed for effective use against high-speed aircraft into a single carriage, namely radar, an analog computer for calculating "lead", and an autoloader for high-speed fire.
Skysweeper was also integrated with the massive anti-aircraft systems under the command of Army's Anti-Aircraft Command (ARAACOM) in the US.
  More results at FactBites »

 
 

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