4.5 Inch Mark 8 Naval Gun
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4.5 Inch Mark 8 Naval Gun
The 4.5 inch Mark 8 is a British naval gun system which currently equips the Royal Navy's destroyers and frigates, and some British destroyers and frigates sold to other countries. Background Guns with a 4.5 inch calibre have been the standard medium-calibre gun of the Royal Navy for use against surface, aircraft and shore targets since 1938. The current 55-calibre Mark 8 gun replaced the World War II era 45-calibre QF 4.5-inch Mk I – V naval guns. Like all British 4.5 inch naval guns, it has a calibre of 4.45 inches (113 mm).Jane's Ammunition Handbook, 1999–2000 Edition. http://www.janes.com/ Design A completely new type of 4.5 inch gun with a longer 55- calibre barrel, it was designed in the 1960s for the Royal Navy's new classes of frigates and destroyers. The new weapon, built by Vickers Ltd Armament Division, was developed by the Royal Armament Research and Development Establishment using the Ordnance, QF 105 mm L13 of the Abbot s ...
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HMS Defender (D36)
HMS ''Defender'' is the fifth of the Type 45 or ''Daring''-class air-defence destroyers built for the Royal Navy. She is the eighth ship to bear the name. Construction of ''Defender'' began in 2006, and she was launched in 2009. The ship completed her first sea trials in October and November 2011, and was commissioned during March 2013. Construction ''Defender''s construction began at the BAE Systems Naval Ships (now part of BAE Systems Surface Ships) yard at Govan on the River Clyde in July 2006. The launch date was 21 October 2009. Sea trials On 21 October 2011, ''Defender'' left Scotstoun shipyard in Glasgow on her maiden voyage exactly two years to the day after she was launched, to conduct her first stage of sea trials. These trials were completed in mid-November. On 9 March 2012, she once again left the Clyde to commence a second round of trials, scheduled to last 28 days in the waters off western Scotland. Operational service The ship left Scotstoun on 21 July 2012 ...
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Caliber
In guns, particularly firearms, caliber (or calibre; sometimes abbreviated as "cal") is the specified nominal internal diameter of the gun barrel Gauge (firearms) , bore – regardless of how or where the bore is measured and whether the finished bore matches that specification. It is measured in inches or in millimetres, millimeters. In the United States it is expressed in hundredths of an inch; in the United Kingdom in thousandths; and elsewhere in millimeters. For example, a "45 caliber" firearm has a barrel diameter of roughly . Barrel diameters can also be expressed using metric dimensions. For example, a "9 mm pistol" has a barrel diameter of about 9 millimeters. Since metric and US customary units do not convert evenly at this scale, metric conversions of caliber measured in decimal inches are typically approximations of the precise specifications in non-metric units, and vice versa. In a rifling , rifled barrel, the distance is measured between opposing Rifling#C ...
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British Army
The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurkhas, and 28,330 volunteer reserve personnel. The modern British Army traces back to 1707, with antecedents in the English Army and Scots Army that were created during the Restoration in 1660. The term ''British Army'' was adopted in 1707 after the Acts of Union between England and Scotland. Members of the British Army swear allegiance to the monarch as their commander-in-chief, but the Bill of Rights of 1689 and Claim of Right Act 1689 require parliamentary consent for the Crown to maintain a peacetime standing army. Therefore, Parliament approves the army by passing an Armed Forces Act at least once every five years. The army is administered by the Ministry of Defence and commanded by the Chief of the General Staff. The Brit ...
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AS-90
The AS-90 ("Artillery System for the 1990s"), known officially as Gun Equipment 155 mm L131, is an armoured self-propelled artillery weapon used by the British Army. It can fire standard charges up to using 39 calibre long barrel (comparable to Russian 2S19 Msta) and with 52 cal. one. The max. rate of fire is 3 rounds in 10 seconds (burst), 6 per minute for 3 minutes (intense), and 2/min. for 60 minutes (sustained). History AS-90 was designed and built by the Armaments division of Vickers Shipbuilding and Engineering (VSEL). Between 1992 and 1995, VSEL supplied 179 vehicles at a cost of £300 million ( $480 million). The AS-90 was first deployed by the British Army in 1993. The AS-90s were acquired to re-equip six of the eight self-propelled field artillery regiments (each of 24 guns) in the I (BR) Corps, replacing the 105 mm FV433 Abbot SPG and older M109 155 mm Self Propelled Gun and FH70 towed howitzer. In 1999, VSEL became a part of BAE Systems. In ...
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155 Mm
155 mm (6.1 in) is a common, NATO-standard, artillery caliber. It is defined in AOP-29 part 1 with reference to STANAG 4425. It is commonly used in field guns, howitzers, and gun-howitzers. Land warfare The caliber originated in France after its defeat in the Franco-Prussian War of 1870–1871, when an artillery committee met on 2 February 1874 to discuss new models for the French fortress and siege artillery, among which there was a piece in the caliber range (later on it became known as the De Bange 155 mm cannon). After several meetings, on 16 April 1874 the committee settled on the 15.5 cm caliber (in the subsequent program-letter of the committee, dating from 21 April 1874, the caliber was for the first time expressed as 155 mm). Since the early 21st century, most NATO armies have adopted 155 mm weapons as an all-purpose standard. They are seen as striking a good compromise between range and power, while only using a single caliber greatly simplifies the logi ...
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BAE Systems
BAE Systems plc (BAE) is a British multinational arms, security, and aerospace company based in London, England. It is the largest defence contractor in Europe, and ranked the seventh-largest in the world based on applicable 2021 revenues. As of 2017, it is the biggest manufacturer in Britain. Its largest operations are in the United Kingdom and United States, where its BAE Systems Inc. subsidiary is one of the six largest suppliers to the US Department of Defense. Other major markets include Australia, Canada, Japan, India, Saudi Arabia, Turkey, Qatar, Oman and Sweden, where Saudi Arabia is regularly among its top three sources of revenue. The company was formed on 30 November 1999 by the £7.7 billion purchase of and merger with Marconi Electronic Systems (MES), the defence electronics and naval shipbuilding subsidiary of the General Electric Company plc (GEC), by British Aerospace, an aircraft, munitions and naval systems manufacturer. BAE is the successor to vari ...
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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 ...
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Red Dwarf
''Red Dwarf'' is a British science fiction comedy franchise created by Rob Grant and Doug Naylor, which primarily consists of a television sitcom that aired on BBC Two between 1988 and 1999, and on Dave since 2009, gaining a cult following. The series follows low-ranking technician Dave Lister, who awakens after being in suspended animation for three million years to find that he is the last living human, and that he is alone on the mining spacecraft ''Red Dwarf''—save for a hologram his deceased bunkmate Arnold Rimmer and "Cat", a life form which evolved from Lister's pregnant cat. As of 2020, the cast includes Chris Barrie as Rimmer, Craig Charles as Lister, Danny John-Jules as Cat, Robert Llewellyn as the sanitation droid Kryten, and Norman Lovett as the ship's computer, Holly. To date, twelve series of the show have aired, (including one miniseries), in addition to a feature-length special ''The Promised Land''. Four novels were published from 1989 to 1996. Two pilot ep ...
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Kryten
Kryten is a fictional character in the British science fiction situation comedy ''Red Dwarf''. The name ''Kryten'' is a reference to the head butler in the J.M. Barrie play ''The Admirable Crichton''. Originally referred to as a Series III mechanoid, he is later described as a 4000 Series, or Series 4000. In their original plan for the series, Rob Grant and Doug Naylor had specified that there would be no aliens and no robots. Following the success of the first appearance by the Kryten character, Naylor convinced Grant to bring him back. In the character's first appearance, originally only intended as a one-off, Kryten was played by actor David Ross (actor), David Ross but the popularity of the character meant that Kryten was introduced as a regular in Series III. The intention was to bring Ross back to play the role, but he was not available at the time and the position was filled by actor Robert Llewellyn. David Ross later returned to voice Talkie Toaster in the series IV epi ...
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HMS Bristol (D23)
HMS ''Bristol'' (D23) was a Type 82 destroyer, the only vessel of her class to be built for the Royal Navy. ''Bristol'' was intended to be the first of a class of large destroyers to escort the CVA-01 aircraft carriers projected to come into service in the early 1970s but the rest of the class and the CVA-01 carriers were cancelled as a result of the 1966 Defence White Paper which cut defence spending. Following a long career which included the Falklands War, she was converted into a training ship in 1987. In 1991 while part of the Dartmouth training squadron, she suffered a failure of one of her Olympus gas turbines that damaged the vessel beyond economical repair. No longer having enough value to be sold to another navy, she became a Harbour Training ship at HMS Excellent. She was decommissioned in Portsmouth on 28 October 2020. Origin The CVA-01 fleet aircraft carrier was designed to replace the World War II vintage aircraft carriers of the Royal Navy. The first plans ...
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Iranian Frigate Alborz
''Alborz'' ( fa, البرز) is an of the Islamic Republic of Iran Navy. The ship was originally called ''Zaal'', named after Zaal, a mythical warrior of ancient Iran (son of Sām and father of Rostam) and an important character in the Shahnameh. After the Islamic Revolution it was renamed ''Alborz'', after the Alborz mountain range. History She completed her refit on 15 May 1977 at Portsmouth. On 1 June 1987 ''Alborz'' stopped a large bulk carrier ''Vevey'' and searched it for possible war material for Iraq. Although this was within the Iranian captain's right to do so under international law, this became known as the first search-and-seizure of the Iran–Iraq War. In January 2010 the ship was sent to the Gulf of Aden, to help protect ships from Somali Piracy. In April 2015, ''Alborz'' was deployed along with the supply vessel ''Bushehr'' to Yemen. Judging by recent photographs, it underwent another modernization during which the Iranian six-barrel Kamand anti-aircraf ...
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Glass-reinforced Plastic
Fiberglass (American English) or fibreglass (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic. Cheaper and more flexible than carbon fiber, it is stronger than many metals by weight, non-magnetic, non-conductive, transparent to electromagnetic radiation, can be molded into complex shapes, and is chemically inert under many circumstances. Applications include aircraft, boats, automobiles, bath tubs and enclosures, swimming pools, hot tubs, septic tanks, water tanks, roofing, pipes, cladding, orthopedic casts, surfboards, and external door skins. Other common names for fiberglass are glass-reinforced plastic (GRP), glass-fiber reinforced plastic (GFRP) or GFK ...
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