|
Ordnance QF 75 Mm Gun
The Ordnance QF 75 mm, abbreviated to OQF 75 mm, was a British tank gun of the Second World War. It was obtained by boring out the Ordnance QF 6-pounder ("6 pdr") 57 mm anti-tank gun to 75 mm, to give better performance against infantry targets similarly to the 75 mm M3 gun fitted to the American Sherman tank. The QF came from "quick-firing", referring to the use of ammunition where the shell has a fixed cartridge. The gun was also sometimes known as ROQF from Royal Ordnance (the manufacturer) Quick-Firing. Development Prior to the introduction of the ROQF 75 mm, British tanks had been equipped with first the QF 2-pounder (40 mm) and then the larger 6-pounder (57 mm). These guns were designed to fire armour-piercing shot, small high-velocity solid rounds that were effective against tanks but did little damage to groups of infantry or soft targets like trucks. Some tanks operating as infantry support were given howitzers firing HE shells, such as early model ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cromwell Tank
The Cromwell tank, officially Tank, Cruiser, Mk VIII, Cromwell (A27M), was one of the series of cruiser tanks fielded by Britain in the Second World War. Named after the English Civil War–era military leader Oliver Cromwell, the Cromwell was the first tank put into service by the British to combine high speed from a powerful, reliable engine (the Rolls-Royce Meteor) and reasonable vehicle armour, armour. The intended dual-purpose high-velocity gun could not be fitted in the turret, so a medium-velocity dual-purpose gun was fitted instead. Further development of the Cromwell combined with a high-velocity gun led to the Comet tank. The name "Cromwell" was initially applied to three vehicles during development. Early Cromwell development led to the creation of the A24 Cavalier. Later Cromwell development led to the creation of the competing Centaur tank (officially the ''Tank, Cruiser, Mk VIII, Centaur (A27L)''). This was closely related to the Cromwell, both vehicles being exter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
War Office
The War Office has referred to several British government organisations throughout history, all relating to the army. It was a department of the British Government responsible for the administration of the British Army between 1857 and 1964, at which point its functions were transferred to the new Ministry of Defence (United Kingdom), Ministry of Defence (MoD). This article contains text from this source, which is available under th Open Government Licence v3.0 © Crown copyright It was equivalent to the Admiralty (United Kingdom), Admiralty at that time, which was responsible for the Royal Navy (RN), and (much later) the Air Ministry, which oversaw the Royal Air Force (RAF). The name 'Old War Office' is also given to the former home of the department, located at the junction of Horse Guards Avenue and Whitehall in central London. The landmark building was sold on 1 March 2016 by HM Government for more than British pound, £350 million, on a 250-year lease for conversion int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burma Campaign
The Burma campaign was a series of battles fought in the British colony of British rule in Burma, Burma as part of the South-East Asian theatre of World War II. It primarily involved forces of the Allies of World War II, Allies (mainly from the British Empire and the Republic of China (1912–49), Republic of China, with support from the United States) against the invading forces of the Empire of Japan. Imperial Japan was supported by the Thailand in World War II, Thai Phayap Army, as well as two Collaboration with Imperial Japan, collaborationist independence movements and armies. Nominally independent puppet states were established in the conquered areas and some Saharat Thai Doem, territories were annexed by Thailand. In 1942 and 1943, the international Allied force in British Raj, British India launched Burma campaign (1942–1943), several failed offensives to retake lost territories. Burma campaign 1944, Fighting intensified in 1944, and British Empire forces peaked at a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Overlord
Operation Overlord was the codename for the Battle of Normandy, the Allies of World War II, Allied operation that launched the successful liberation of German-occupied Western Front (World War II), Western Europe during World War II. The operation was launched on 6 June 1944 (D-Day (military term), D-Day) with the Normandy landings (Operation Neptune). A 1,200-plane Airborne forces, airborne assault preceded an amphibious warfare, amphibious assault involving more than 5,000 vessels. Nearly 160,000 troops crossed the English Channel on 6 June, and more than two million Allied troops were in France by the end of August. The decision to undertake cross-channel landings in 1944 was made at the Washington Conference (1943), Trident Conference in Washington, D.C., Washington in May 1943. American General Dwight D. Eisenhower was appointed commander of Supreme Headquarters Allied Expeditionary Force, and British General Bernard Montgomery was named commander of the 21st Army Group, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammonium Nitrate
Ammonium nitrate is a chemical compound with the formula . It is a white crystalline salt consisting of ions of ammonium and nitrate. It is highly soluble in water and hygroscopic as a solid, but does not form hydrates. It is predominantly used in agriculture as a high-nitrogen fertilizer. Its other major use is as a component of explosive mixtures used in mining, quarrying, and civil construction. It is the major constituent of ANFO, an industrial explosive which accounts for 80% of explosives used in North America; similar formulations have been used in improvised explosive devices. Many countries are phasing out its use in consumer applications due to concerns over its potential for misuse.Ammonium nitrate sold by ton as U.S. regulati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amatol
Amatol is a highly explosive material made from a mixture of TNT and ammonium nitrate. The British name originates from the words ammonium and toluene (the precursor of TNT). Similar mixtures (one part dinitronaphthalene and seven parts ammonium nitrate) were known as Schneiderite in France. Amatol was used extensively during World War I and World War II, typically as an explosive in military weapons such as aircraft bombs, shells, depth charges, and naval mines.Brown, G. I. (1998). ''The Big Bang: A History of Explosives''. Sutton Publishing . pp. 158-163. It was eventually replaced with alternative explosives such as Composition B, Torpex, and Tritonal. Invention Following the Shell Crisis of 1915 in which the UK did not have enough ordnance due to a lack of explosives, a team at the Royal Arsenal laboratories produced a mixture of ammonium nitrate and TNT, known as Amatol for short. Special factories were constructed for the manufacture of ammonium nitrate by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trinitrotoluene
Troponin T (shortened TnT or TropT) is a part of the troponin complex, which are proteins integral to the contraction of skeletal and heart muscles. They are expressed in skeletal and cardiac myocytes. Troponin T binds to tropomyosin and helps position it on actin, and together with the rest of the troponin complex, modulates contraction of striated muscle. The cardiac subtype of troponin T is especially useful in the laboratory diagnosis of heart attack because it is released into the blood-stream when damage to heart muscle occurs. It was discovered by the German physician Hugo A. Katus at the University of Heidelberg, who also developed the troponin T assay. Subtypes * Slow skeletal troponin T1, TNNT1 (19q13.4, ) * Cardiac troponin T2, TNNT2 (1q32, ) * Fast skeletal troponin T3, TNNT3 (11p15.5, ) Reference values The 99th percentile cutoff for cardiac troponin T (cTnT) is 0.01 ng/mL. The reference range for the high sensitivity troponin T is a normal 52 ng/L. Backgr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loading Ammunition Into Churchill Tank Normandy 17-07-1944 IWM B 7619
Loading may refer to: Biology * Carbohydrate loading, a strategy employed by endurance athletes to maximize the storage of glycogen in the muscles * Creatine loading, a phase of use of creatine supplements * Vocal loading, the stress inflicted on the speech organs when speaking for long periods Engineering * Application of a structural load to a system ** Disk loading, the pressure maintained over the swept area of a helicopter's rotor ** Seismic loading, one of the basic concepts of earthquake engineering ** Wing loading, the loaded weight of an aircraft divided by the area of its wing * Loading characteristic, a measure of traffic on a telephone system * Insertion of an electrical load An electrical load is an electrical component or portion of a Electric Circuit, circuit that consumes (active) electric power, such as electrical appliances and Electric light, lights inside the home. The term may also refer to the power Power con ... into a circuit ** Use of a loading coil t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ordnance QF 95 Mm Howitzer
The Ordnance QF 95-mm howitzer was a British howitzer built in two versions during the Second World War. The tank howitzer version was accepted for service use, but the infantry version was not. Design and development Tank howitzer The Ordnance QF 95-mm tank howitzer was designed to be fitted to some later British tanks so they could lay smoke screens or fire HE or HEAT/Hollow Charge shell against concrete targets like pillboxes in the "close support" of infantry. A HESH round may have been issued after World War II. The 95 mm howitzer used fixed ammunition with a projectile, rather than separate charge and round common for artillery howitzers. The tank howitzer was used to arm the Churchill Mark V and VIII, the Cromwell VI & VIII and the Centaur IV tanks. The howitzer was built up from a section of a QF 3.7-inch anti-aircraft gun barrel, the breech mechanism of the Ordnance QF 25 pounder field gun/howitzer and the recoil mechanism of the Ordnance QF 6 pounder anti-tank ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muzzle Energy
Muzzle energy is the kinetic energy of a bullet as it is expelled from the muzzle (firearm), muzzle of a firearm. Without consideration of factors such as aerodynamics and gravity for the sake of comparison, muzzle energy is used as a rough indication of the destructive potential of a given firearm or cartridge. The heavier the bullet and especially the Muzzle velocity, faster it moves, the higher its muzzle energy and the more damage it will do. Kinetic energy The general formula for the kinetic energy is E_\mathrm = \frac mv^2, where ''v'' is the velocity of the bullet and ''m'' is the mass of the bullet. Although both mass and velocity contribute to the muzzle energy, the muzzle energy is proportional to the mass while proportional to the ''square'' of the velocity. The velocity of the bullet is a more important determinant of muzzle energy. For a constant velocity, if the mass is doubled, the energy is doubled; however, for a constant mass, if the velocity is doubled, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
QF 3-inch 20 Cwt
The QF 3-inch 20 cwt anti-aircraft gun became the standard anti-aircraft gun used in the home defence of the United Kingdom against German Zeppelins airships and bombers and on the Western Front in World War I. It was also common on British warships in World War I and submarines in World War II. 20 cwt referred to the weight of the barrel and breech, to differentiate it from other 3-inch guns (1cwt = 1 hundredweight = , hence the barrel and breech together weighed ). While other AA guns also had a bore of , the term ''3-inch'' was only ever used to identify this gun in the World War I era, and hence this is what writers are usually referring to by ''3-inch AA gun''. Design and development The gun was based on a prewar Vickers naval QF gun with modifications specified by the War Office in 1914. These (Mk I) included the introduction of a vertical sliding breech-block to allow semi-automatic operation. When the gun recoiled and ran forward after firing, the motion also opened the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
