|
L94A1
L94A1 is the British Ministry of Defence designation for the long-barrelled version of the Hughes EX-34 7.62 mm chain gun, which is fitted to several British Army armoured fighting vehicles, including the Challenger 2 and the Warrior. A second version with a shorter barrel, designated L95A1, was also procured in small numbers. The weapon was produced by Heckler & Koch in the UK. Design The EX-34 was specifically designed for use as a coaxial weapon in armoured vehicles, and has a number of features that make it suitable for this role. The gun is externally powered, meaning that misfires do not need to be manually cleared, instead the rounds are simply ejected. All spent cases are ejected forwards out of the turret. This prevents any build-up of spent shell cases causing stoppages. Additionally, all gas generated by firing is vented through the barrel and ejection tube, preventing the build-up of toxic gases inside the armoured vehicle. The weapon is cooled by a venturi s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Challenger 2
The FV4034 Challenger 2 (MOD designation "CR2") is a third generation British main battle tank (MBT) in service with the armies of the United Kingdom and Oman. It was designed and built by the British company Vickers Defence Systems (now known as BAE Systems Land & Armaments). Vickers Defence Systems began to develop a successor to the Challenger 1 as a private venture in 1986. The Ministry of Defence ordered a prototype in December 1988. In June 1991, the MoD placed an order for 140 vehicles, with a further 268 ordered in 1994. Production began in 1993 and the unit's tanks were delivered in July 1994, replacing the Challenger 1. After a production delay, the tank entered service with the British Army in 1998, with the last delivered in 2002. The Challenger 2 was also exported to Oman. The Challenger 2 is an extensive redesign of the Challenger 1. Although the hull and automotive components seem similar, they are of a newer design than for the Challenger 1 and only around 3% of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warrior Tracked Armoured Vehicle
The Warrior tracked vehicle family is a series of British armoured vehicles, originally developed to replace FV430 series armoured vehicles. The Warrior started life as the MCV-80, "Mechanised Combat Vehicle for the 1980s". One of the requirements of the new vehicle was a top speed able to keep up with the projected new MBT, the MBT-80 later cancelled and replaced by what became the Challenger 1 which the FV432 armoured personnel carrier could not. The project was begun in 1972; GKN Defence won the production contract in 1984 and the Warrior was accepted for service with the British Army in November 1984. Production commenced in January 1986 at Telford, with the first vehicles completed in December that year. GKN Defence was purchased by BAE Systems, via Alvis plc. The first production vehicle was handed over to the British Army in May 1987 to 1st Battalion Grenadier Guards and from 1988 to 1990 four more armoured infantry battalions in the British Army of the Rhine were convert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Gun
A chain gun is a type of autocannon or machine gun that uses an external source of power to cycle the weapon's action, rather than diverting excess energy from the cartridges' propellant as in a typical automatic firearm, and does so via a continuous loop of chain drive similar to that used on a motorcycle or bicycle. History In 1972, Hughes Helicopters began a company-funded research effort to design a single machine gun to fire the U.S. Army's M50 round. By April 1973, the program had fired test rounds in more powerful WECOM linked ammunition, from a prototype (A model). In January 1975 a model "C" was added, a linkless version for the proposed Advanced Attack Helicopter YAH-64; the helicopter was later adopted as the Hughes Model 77/AH-64A Apache, with the model C (receiving the designation M230 chain gun) as standard armament. In 1976, Hughes Helicopters successfully patented the chain gun, and it has since been further developed into several other system of different c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Gun
A chain gun is a type of autocannon or machine gun that uses an external source of power to cycle the weapon's action, rather than diverting excess energy from the cartridges' propellant as in a typical automatic firearm, and does so via a continuous loop of chain drive similar to that used on a motorcycle or bicycle. History In 1972, Hughes Helicopters began a company-funded research effort to design a single machine gun to fire the U.S. Army's M50 round. By April 1973, the program had fired test rounds in more powerful WECOM linked ammunition, from a prototype (A model). In January 1975 a model "C" was added, a linkless version for the proposed Advanced Attack Helicopter YAH-64; the helicopter was later adopted as the Hughes Model 77/AH-64A Apache, with the model C (receiving the designation M230 chain gun) as standard armament. In 1976, Hughes Helicopters successfully patented the chain gun, and it has since been further developed into several other system of different c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friendly Fire
In military terminology, friendly fire or fratricide is an attack by belligerent or neutral forces on friendly troops while attempting to attack enemy/hostile targets. Examples include misidentifying the target as hostile, cross-fire while engaging an enemy, long range ranging errors or inaccuracy. Accidental fire not intended to attack enemy/hostile targets, and deliberate firing on one's own troops for disciplinary reasons, is not called friendly fire,Regan, Geoffrey (2002) ''Backfire: a history of friendly fire from ancient warfare to the present day'', Robson Books and neither is unintentional harm to civilian or neutral targets, which is sometimes referred to as collateral damage. Training accidents and bloodless incidents also do not qualify as friendly fire in terms of casualty reporting. Use of the term "friendly" in a military context for allied personnel started during the First World War, often when shells fell short of the targeted enemy. The term ''friendly fire'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George M
''George M!'' is a Broadway musical based on the life of George M. Cohan, the biggest Broadway star of his day who was known as "The Man Who Owned Broadway." The book for the musical was written by Michael Stewart, John Pascal, and Francine Pascal. Music and lyrics were by George M. Cohan himself, with revisions for the musical by Cohan's daughter, Mary Cohan. The story covers the period from the late 1880s until 1937 and focuses on Cohan's life and show business career from his early days in vaudeville with his parents and sister to his later success as a Broadway singer, dancer, composer, lyricist, theatre director and producer. The show includes such Cohan hit songs as "Give My Regards To Broadway", "You're a Grand Old Flag", and "Yankee Doodle Dandy." Productions The musical opened on Broadway at the Palace Theatre on April 10, 1968 and closed on April 26, 1969 after 433 performances and 8 previews. The show was produced by David Black and directed and choreographed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M60 Tank
The M60 is an American second-generation main battle tank (MBT). It was officially standardized as the Tank, Combat, Full Tracked: 105-mm Gun, M60 in March 1959. Although developed from the M48 Patton, the M60 tank series was never officially christened as a Patton tank. The US Army considered it a "product-improved descendant" of the Patton tank's design. The design similarities are evident comparing the original version of the M60 and the M48A2. It has been sometimes informally grouped as a member of the Patton tank family. The United States fully committed to the MBT doctrine in 1963, when the Marine Corps retired the last ( M103) heavy tank battalion. The M60 tank series became America's primary main battle tank during the Cold War, reaching a production total of 15,000 M60s. Hull production ended in 1983, but 5,400 older models were converted to the M60A3 variant ending in 1990. The M60 reached operational capability upon fielding to US Army European units beginning in Dec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venturi Effect
The Venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section (or choke) of a pipe. The Venturi effect is named after its discoverer, the 18th century Italian physicist, Giovanni Battista Venturi. Background In inviscid fluid dynamics, an incompressible fluid's velocity must ''increase'' as it passes through a constriction in accord with the principle of mass continuity, while its static pressure must ''decrease'' in accord with the principle of conservation of mechanical energy (Bernoulli's principle). Thus, any gain in kinetic energy a fluid may attain by its increased velocity through a constriction is balanced by a drop in pressure. By measuring pressure, the flow rate can be determined, as in various flow measurement devices such as Venturi meters, Venturi nozzles and orifice plates. Referring to the adjacent diagram, using Bernoulli's equation in the special case of steady, incompressible, inviscid flows (such as t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armoured Fighting Vehicle
An armoured fighting vehicle (AFV) is an armed combat vehicle protected by armour, generally combining operational mobility with offensive and defensive capabilities. AFVs can be wheeled or tracked. Examples of AFVs are tanks, armoured cars, assault guns, self-propelled guns, infantry fighting vehicles, and armoured personnel carriers. Armoured fighting vehicles are classified according to their characteristics and intended role on the battlefield. The classifications are not absolute; two countries may classify the same vehicle differently, and the criteria change over time. For example, relatively lightly armed armoured personnel carriers were largely superseded by infantry fighting vehicles with much heavier armament in a similar role. Successful designs are often adapted to a wide variety of applications. For example, the MOWAG Piranha, originally designed as an APC, has been adapted to fill numerous roles such as a mortar carrier, infantry fighting vehicle, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hughes Helicopters
Hughes Helicopters was a major manufacturer of military and civil helicopters from the 1950s to the 1980s. The company began in 1947, as a unit of Hughes Aircraft, then was part of the Hughes Tool Company after 1955. It became the Hughes Helicopter Division, Summa Corporation in 1972, and was reformed as Hughes Helicopters, Inc. in 1981. However, throughout its history, the company was informally known as "Hughes Helicopters". It was sold to McDonnell Douglas in 1984 and made a subsidiary under the name ''McDonnell Douglas Helicopter Systems''. See MD Helicopters for history of the company after this acquisition. In 1997 McDonnell Douglas merged with Boeing with Boeing as the surviving company. History In 1947, Howard Hughes redirected the Hughes Aircraft Company's efforts from airplanes to helicopters. The effort began in earnest in 1948, when helicopter manufacturer Kellett Autogiro Corporation sold their latest design to Hughes for production. The XH-17 "Sky Crane" firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ministry Of Defence (United Kingdom)
The Ministry of Defence (MOD or MoD) is the department responsible for implementing the defence policy set by His Majesty's Government, and is the headquarters of the British Armed Forces. The MOD states that its principal objectives are to defend the United Kingdom of Great Britain and Northern Ireland and its interests and to strengthen international peace and stability. The MOD also manages day-to-day running of the armed forces, contingency planning and defence procurement. The expenditure, administration and policy of the MOD are scrutinised by the Defence Select Committee, except for Defence Intelligence which instead falls under the Intelligence and Security Committee of Parliament. History During the 1920s and 1930s, British civil servants and politicians, looking back at the performance of the state during the First World War, concluded that there was a need for greater co-ordination between the three services that made up the armed forces of the United Kingdom: t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_(Tony_Radakin_cropped).jpg "Click for more on -> Ministry Of Defence (United Kingdom)")