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Tracked Vehicle
Continuous track is a system of vehicle propulsion used in tracked vehicles, running on a continuous band of treads or track plates driven by two or more wheels. The large surface area of the tracks distributes the weight of the vehicle better than steel or rubber tires on an equivalent vehicle, enabling continuous tracked vehicles to traverse soft ground with less likelihood of becoming stuck due to sinking. Modern continuous tracks can be made with soft belts of synthetic rubber, reinforced with steel wires, in the case of lighter agricultural machinery. The more common classical type is a solid chain track made of steel plates (with or without rubber pads), also called caterpillar tread or tank tread, which is preferred for robust and heavy construction vehicles and military vehicles. The prominent treads of the metal plates are both hard-wearing and damage resistant, especially in comparison to rubber tyres. The aggressive treads of the tracks provide good t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caterpillar Track Shingle
Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths). As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder Symphyta) are commonly called caterpillars as well. Both lepidopteran and symphytan larvae have eruciform body shapes. Caterpillars of most species eat plant material ( often leaves), but not all; some (about 1%) eat insects, and some are even cannibalistic. Some feed on other animal products. For example, clothes moths feed on wool, and horn moths feed on the hooves and horns of dead ungulates. Caterpillars are typically voracious feeders and many of them are among the most serious of agricultural pests. In fact, many moth species are best known in their caterpillar stages because of the damage they cause to fruits and other agricultural produce, whereas the moths are obscure and do no direct harm. Conversely, various species of cat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulldozer
A bulldozer or dozer (also called a crawler) is a large, motorized machine equipped with a metal blade to the front for pushing material: soil, sand, snow, rubble, or rock during construction work. It travels most commonly on continuous tracks, though specialized models riding on large off-road tires are also produced. Its most popular accessory is a ripper, a large hook-like device mounted singly or in multiples in the rear to loosen dense materials. Bulldozers are used heavily in large and small scale construction, road building, minings and quarrying, on farms, in heavy industry factories, and in military applications in both peace and wartime. The word "bulldozer" refers only to a motorized unit fitted with a blade designed for pushing. The word is sometimes used inaccurately for other heavy equipment such as a front-end loader designed for carrying rather than pushing material. Description Typically, bulldozers are large and powerful tracked heavy equipmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crimean War
The Crimean War, , was fought from October 1853 to February 1856 between Russia and an ultimately victorious alliance of the Ottoman Empire, France, the United Kingdom and Piedmont-Sardinia. Geopolitical causes of the war included the decline of the Ottoman Empire, the expansion of the Russian Empire in the preceding Russo-Turkish Wars, and the British and French preference to preserve the Ottoman Empire to maintain the balance of power in the Concert of Europe. The flashpoint was a disagreement over the rights of Christian minorities in Palestine, then part of the Ottoman Empire, with the French promoting the rights of Roman Catholics, and Russia promoting those of the Eastern Orthodox Church. The churches worked out their differences with the Ottomans and came to an agreement, but both the French Emperor Napoleon III and the Russian Tsar Nicholas I refused to back down. Nicholas issued an ultimatum that demanded the Orthodox subjects of the Ottoman Empire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Boydell
James Boydell (died January 1860) was a British inventor of steam traction engines. His most significant invention was the first practical track-laying vehicle, for which he received British patents in August 1846 and February 1854. Description Boydell described his invention as "endless rails" or an "endless railway wheel", later variations became known as Dreadnaught Wheels. In his system flat boards were attached to a wheel loosely at their centres. As the wheels revolved, they were capable of spreading the weight of an engine over the surface of the board. Boydell worked with the steam traction engine manufacturer Charles Burrell & Sons to produce road haulage engines from 1856 that used his continuous track design. Lane (1971), p. 23 Boydell Glacier The United Kingdom Antarctic Place-Names Committee named Boydell Glacier on Trinity Peninsula in northern Graham Land, Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolton-le-Moors
Bolton le Moors (also known as Bolton le Moors St Peter) was a large civil parish and ecclesiastical parish in hundred of Salford in the historic county of Lancashire, England. It was administered from St Peter's Church, Bolton in the township of Great Bolton. History Bolton le Moors was originally a part of the ancient parish of Eccles. In the 14th century it became a parish in its own right. It resembled what is now the town of Bolton and some outskirts. As with many large parishes in the north of England, it was split into townships in 1662 for easier civic administration. Some of the townships had chapels and were known as chapelries.Map of Bolton ancient parishes Retrieved on 15 March 2009. * Anglezarke * [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Moss, Greater Manchester
Red Moss is a wetland mossland in Greater Manchester, located south of Horwich and east of Blackrod. This is a national Site of Special Scientific Interest in the United Kingdom, due to its biodiversity and undisturbed character. Pollen analysis has revealed the first peat deposits of the northwest's mosslands to be from around 8,000 years BC making Red Moss an impressive 10,000 years old. Red Moss covers an area of 47.2 hectares. A severed female head was discovered in Red Moss in the 19th century dating from the Bronze Age or early Iron Age. Bolton Metropolitan Borough Council owns most of the moss, but parts of the site are also owned by British Rail and United Utilities. History In 1999, the Wildlife Trust for Lancashire, Manchester and North Merseyside was asked to manage the area of land owned by Bolton Council with the aim of restoring suitable water levels and conditions for the growth of mossland species. Since 1999, the Trust has been undertaking large-scale c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Heathcoat
John Heathcoat (7 August 1783 – 18 January 1861) was an English inventor from Duffield, Derbyshire. During his apprenticeship he made an improvement to the warp-loom, so as to produce mitts of a lace-like appearance. He set up his own business in Nottingham but was forced to move away to Hathern in Leicestershire, and after this new factory was attacked by former Luddites in 1816 he moved the business to Tiverton in Devon where it became most successful and established the Tiverton lace-making industry. Later in life he served as Member of Parliament for Tiverton. Early life Heathcoat was born at Duffield near Derby and was apprenticed to a frame-smith at Hathern. Career Leicestershire During his apprenticeship he made an improvement in the construction of the warp- loom, so as to produce mitts of a lace-like appearance by means of it. He began business on his own account at Nottingham, but finding himself subjected to the intrusion of competing inventors he remove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russia
Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eighth of Earth's inhabitable landmass. Russia extends across eleven time zones and shares land boundaries with fourteen countries, more than any other country but China. It is the world's ninth-most populous country and Europe's most populous country, with a population of 146 million people. The country's capital and largest city is Moscow, the largest city entirely within Europe. Saint Petersburg is Russia's cultural centre and second-largest city. Other major urban areas include Novosibirsk, Yekaterinburg, Nizhny Novgorod, and Kazan. The East Slavs emerged as a recognisable group in Europe between the 3rd and 8th centuries CE. Kievan Rus' arose as a state in the 9th century, and in 988, it adopted Orthodox Christianity from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Cayley
Sir George Cayley, 6th Baronet (27 December 1773 – 15 December 1857) was an English engineer, inventor, and aviator. He is one of the most important people in the history of aeronautics. Many consider him to be the first true scientific aerial investigator and the first person to understand the underlying principles and forces of flight and the first man to create the wire wheel. * * * In 1799, he set forth the concept of the modern aeroplane as a fixed-wing flying machine with separate systems for lift, propulsion, and control. He was a pioneer of aeronautical engineering and is sometimes referred to as "the father of aviation." He identified the four forces which act on a heavier-than-air flying vehicle: weight, lift, drag and thrust. Modern aeroplane design is based on those discoveries and on the importance of cambered wings, also proposed by Cayley. He constructed the first flying model aeroplane and also diagrammed the elements of vertical flight. He also designed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymath
A polymath ( el, πολυμαθής, , "having learned much"; la, homo universalis, "universal human") is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific problems. In Western Europe, the first work to use the term polymathy in its title () was published in 1603 by Johann von Wowern, a Hamburg philosopher. Von Wowern defined polymathy as "knowledge of various matters, drawn from all kinds of studies ... ranging freely through all the fields of the disciplines, as far as the human mind, with unwearied industry, is able to pursue them". Von Wowern lists erudition, literature, philology, philomathy, and polyhistory as synonyms. The earliest recorded use of the term in the English language is from 1624, in the second edition of '' The Anatomy of Melancholy'' by Robert Burton; the form ''polymathist'' is slightly older, first appearing in the ''Diatribae upon the first part of the late Hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
