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Vickers Main Battle Tank Mark 3
The Vickers Main Battle Tank Mk. 3 is a main battle tank by Vickers, a development of the Vickers MBT, and introduced in 1975 for the export market. It was the last of the Vickers tanks to see sales in numbers abroad. History In 1974, Vickers pressed on with development of a Mark 3 version of their Vickers MBT. This stems from Design No. 51400 T and differs from the Mark 1 mainly in having a turret with a well-shaped cast front welded to a fabricated armour plate body. It also has a cast gun mantlet which is better shaped from the point of view of its resistance to armour-piercing projectiles than the flat mantlet of the Mark. 1. The Mark 3 embodies various other improvements, such as an increase in the depression of its main gun from -7 to -10 degrees below the horizontal and an increase in the ammunition from 44 to 50 rounds. The first production order for Mk. 3 tanks was placed in 1977 by the Government of Kenya. In 1977, Vickers acquired a £100 million trade deal to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Main Battle Tank
A main battle tank (MBT), also known as a battle tank or universal tank, is a tank that fills the role of armor-protected direct fire and maneuver in many modern armies. Cold War-era development of more powerful engines, better suspension systems and lighter-weight composite armor allowed the design of a tank that had the firepower of a super-heavy tank, the armor protection of a heavy tank, and the mobility of a light tank, in a package with the weight of a medium tank. Through the 1960s and 1970s, the MBT replaced almost all other types of tanks, leaving only some specialist roles to be filled by lighter designs or other types of armored fighting vehicles. Main battle tanks are a key component of modern armies.#House1984, House (1984), ''Toward Combined Arms Warfare: A Survey of 20th-Century Tactics, Doctrine, and Organization'' Modern MBTs seldom operate alone, as they are organized into armoured units that include the support of infantry, who may accompany the tanks in inf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boko Haram
Boko Haram, officially known as ''Jamā'at Ahl as-Sunnah lid-Da'wah wa'l-Jihād'' ( ar, جماعة أهل السنة للدعوة والجهاد, lit=Group of the People of Sunnah for Dawah and Jihad), is an Islamic terrorist organization based in northeastern Nigeria, which is also active in Chad, Niger, and northern Cameroon. In 2016, the group split, resulting in the emergence of a hostile faction known as the Islamic State's West Africa Province. Founded by Mohammed Yusuf in 2002, the group was led by Abubakar Shekau from 2009 until his death in 2021, although it splintered into other groups after Yusuf's death and also in 2015. When the group was first formed, their main goal was to "purify" Islam in northern Nigeria, believing jihad should be delayed until the group was strong enough to overthrow the Nigerian government. The group formerly aligned itself with the Islamic State of Iraq and the Levant. The group has been known for its brutality, and since the insurge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Positioning System
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephonic or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was lau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilkington Optronics
Pilkington is a Japanese-owned glass-manufacturing company which is based in Lathom, Lancashire, United Kingdom. In the UK it includes several legal entities and is a subsidiary of Japanese company NSG Group. Prior to its acquisition by NSG in 2006, it was an independent company listed on the London Stock Exchange and for a time was a constituent of the FTSE 100 Index. History The company was founded in 1826 as a partnership between members of the Pilkington and Greenall families, based in St Helens, Lancashire (now Merseyside). The venture used the trading name of ''St Helens Crown Glass Company''. On the departure from the partnership of the last Greenall in 1845, the firm became known as ''Pilkington Brothers''. In 1894, the business was incorporated under the Companies Act 1862 as ''Pilkington Brothers Limited''. Pilkington was floated as a public company on the London Stock Exchange in 1970. It was for many years the biggest employer in the northwest industrial town. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SIG Combibloc Group
SIG Combibloc Group AG, originally founded as ''Schweizerische Industrie Gesellschaft'' (German for Swiss Industrial Company; in French, as ''Société Industrielle Suisse''; and, in Italian, as ''Societa Industriale Svizzera''), and later known as SIG Holding AG, is a company currently active in the Packaging industry but used to participate in firearms and railcar manufacturing as well. In 2007, SIG Holding AG was acquired by Rank Group Limited, the private investment company of New Zealand businessman Graeme Hart, and operated under its subsidiary, Reynolds Group Holdings Ltd., which, in March 2015, announced completion of its sale of SIG to ONEX Corporation of Canada. In 2018, SIG Combibloc secured a $1.101 billion loan, with Barclays Bank acting as the administrative agent on the transaction. The SIG Combibloc Group shares are listed on SIX Swiss Exchange and it is a component of the SMI MID index. History The ''schweizerische Waggonfabrik''Hermann Alexander von Berlepsch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Explosive Reactive Armor
Reactive armour is a type of vehicle armour that reacts in some way to the impact of a weapon to reduce the damage done to the vehicle being protected. It is most effective in protecting against shaped charges and specially hardened kinetic energy penetrators. The most common type is ''explosive reactive armour'' (ERA), but variants include ''self-limiting explosive reactive armour'' (SLERA), ''non-energetic reactive armour'' (NERA), ''non-explosive reactive armour'' (NxRA), and electric armour. NERA and NxRA modules can withstand multiple hits, unlike ERA and SLERA. A second hit in exactly the same location may potentially penetrate any of those, as the armour in that spot is compromised. Reactive armour is intended to counteract anti-tank munitions that work by piercing the armour and then either kill the crew inside, disable vital mechanical systems, or create spalling that disables the crew — or all three. Reactive armour can be defeated with multiple hits in the same p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Ordnance
Royal Ordnance plc was formed on 2 January 1985 as a public corporation, owning the majority of what until then were the remaining United Kingdom government-owned Royal Ordnance Factories (abbreviated ROFs) which manufactured explosives, ammunition, small arms including the Lee–Enfield rifle, guns and military vehicles such as tanks. It owned some 16 factories; and employed about 19,000 staff. Royal Ordnance plc was bought by British Aerospace (BAe) in April 1987, which became BAE Systems in 1999. The name Royal Ordnance was retained for almost another twenty years; and the sites retained their former names, either as ''Royal Ordnance'' or later ''RO Defence'' sites. The Royal Ordnance name was dropped in 2004 and after having traded as Land Systems, the division is now known as Land UK. History Royal Ordnance Factories The Royal Ordnance Factories (ROFs) can trace their history back to 1560 with the founding of the Royal Gunpowder Factory (RGPF) at Waltham Abbey, Essex. This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laser Rangefinder
A laser rangefinder, also known as a laser telemeter, is a rangefinder that uses a laser beam to determine the distance to an object. The most common form of laser rangefinder operates on the time of flight principle by sending a laser pulse in a narrow beam towards the object and measuring the time taken by the pulse to be reflected off the target and returned to the sender. Due to the high speed of light, this technique is not appropriate for high precision sub-millimeter measurements, where triangulation and other techniques are often used. Pulse The pulse may be coded to reduce the chance that the rangefinder can be jammed. It is possible to use Doppler effect techniques to judge whether the object is moving towards or away from the rangefinder, and if so, how fast. Precision The precision of the instrument is determined by the rise or fall time of the laser pulse and the speed of the receiver. One that uses very sharp laser pulses and has a very fast detector can rang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolls-Royce
Rolls-Royce (always hyphenated) may refer to: * Rolls-Royce Limited, a British manufacturer of cars and later aero engines, founded in 1906, now defunct Automobiles * Rolls-Royce Motor Cars, the current car manufacturing company incorporated in 1998, a subsidiary of BMW Group * Rolls-Royce Motors, owner of the former car division incorporated in 1973, bought by Vickers in 1980, a subsidiary of Volkswagen Group from 1998 to 2002 * List of Rolls-Royce motor cars Aerospace and nuclear power * Rolls-Royce Holdings plc, an aerospace, power systems and defence company and Rolls-Royce's current principal operating company **Rolls-Royce Deutschland ***Rolls-Royce Power Systems ** Rolls-Royce Marine Power Operations ** Rolls-Royce North America ** Rolls-Royce Turbomeca ** Rolls-Royce Kamawea, now Kamewa ** Rolls-Royce Controls and Data Services See also * Rose Royce, an American soul and R&B group * Roll (other) * Royce (other) Markus Bennett is an American hip-hop re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two-stroke Diesel Engine
A two-stroke diesel engine is an internal combustion engine that uses compression ignition, with a two-stroke combustion cycle. It was invented by Hugo Güldner in 1899.Mau (1984) p.7 In compression ignition, air is first compressed and heated; fuel is then injected into the cylinder, causing it to self-ignite. The two-stroke cycle ignites the fuel to deliver a power stroke each time the piston rises and falls in the cylinder, without any need for the additional exhaust and induction strokes of the four-stroke cycle. History According to the designer of the first operational diesel engine, Imanuel Lauster, Rudolf Diesel did not originally intend using the two-stroke principle for the diesel engine. Hugo Güldner designed what is believed to be the first operational two-stroke diesel engine in 1899, and he convinced MAN, Krupp and Diesel to fund building this engine with ℳ 10,000 each. Güldner's engine had a 175 mm work cylinder, and a 185 mm scavenging cylinder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detroit Diesel Series 71
The Detroit Diesel Series 71 is a two-stroke diesel engine series, available in both inline and V configurations, manufactured by Detroit Diesel. The number 71 refers to the nominal displacement per cylinder in cubic inches, a rounding off of . Inline models included one, two, three, four and six cylinders, and the V-types six, eight, 12, 16 and 24 cylinders. The two largest V units used multiple cylinder heads per bank to keep the head size and weight to manageable proportions, the V-16 using four heads from the four-cylinder inline model and the V-24 using four heads from the inline six-cylinder model. This feature also assisted in keeping down the overall cost of these large engines by maintaining parts commonality with the smaller models. History The inline six-cylinder 71 series engine was introduced as the initial flagship product of the Detroit Diesel Engine Division of General Motors in 1938. The V-type first appeared in 1957. Sales of The 71 Series ceased in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marconi Electronic Systems
Marconi Electronic Systems (MES), or GEC-Marconi as it was until 1998, was the defence arm of General Electric Company (GEC). It was demerged from GEC and bought by British Aerospace (BAe) on 30 November 1999 to form BAE Systems. GEC then renamed itself Marconi plc. MES exists today as BAE Systems Electronics Limited, a subsidiary of BAE Systems, but the assets were rearranged elsewhere within that company. MES-related businesses include BAE Systems Submarine Solutions, BAE Systems Surface Ships, BAE Systems Insyte and Selex ES (now a part of Leonardo S.p.A.). History MES represented the pinnacle of GEC's defence businesses which had a heritage of almost 100 years. Following GEC's acquisition of Marconi as part of English Electric in 1968, the Marconi brand was used for its defence businesses, e.g. Marconi Space & Defence Systems (MSDS), Marconi Underwater Systems Ltd (MUSL). GEC's history of military products dates back to World War I with its contribution to the war effo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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