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Snowcats
A snowcat (short for snow and caterpillar) is an enclosed-cab, truck-sized, fully tracked vehicle designed to move on snow. Major manufacturers are Pisten Bully (Germany), Prinoth (Italy) and Tucker (United States). Snow groomers A snowcat dedicated to snow maintenance rather than transport is a snow groomer. Other terms are "piste machines", "trail groomers" (in North American English) or "piste bashers" (in British English) because of their use in preparing ski trails ("pistes") or snowmobile trails. Other functions In addition to grooming snow they are used for polar expeditions, logging in marsh areas, leveling sugar beet piles, medical evacuations and seismic studies in the wild. Construction Most snowcats, such as the ones produced by Bombardier or Aktiv in the past, have two sets of tracks, fitted with a Christie suspension or a Horstmann suspension. Others, like the Tucker Sno-Cat and Hägglunds ''Bandvagn 206'' vehicles, have a complex arrangement of four or m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prinoth (company)
Prinoth is an Italian manufacturer of snow groomers and tracked utility vehicles. The company's headquarters are located in Sterzing, South Tyrol, Italy. With its fleet of snow groomers, Prinoth is active in slope preparation. Its utility vehicles are used as carrier vehicles and for vegetation and biomass management. History In 1951, Prinoth was founded when racing driver Ernesto Prinoth opened the predecessor of the current company, a garage. Fascinated by snow vehicles applied his passion for high-performance vehicles to the development of slope vehicles. In 1962, produced his first P 60 prototype. Two years later, the first production vehicle rolled off the assembly line and developments continued over the years. In 2000, Prinoth was acquired by Leitner Group and continued the range as an independent company, becoming the world's most complete provider of snowcats. In November 2005, Prinoth acquired the design, engineering, R&D, service, parts and sales operations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BAE Systems AB
BAE Systems AB is a Swedish defence company and a subsidiary of BAE Systems Land & Armaments, whose ultimate parent is the British defence contractor BAE Systems. The company is a holding company for Land Systems Hägglunds AB and BAE Systems Bofors AB, and has no products of its own. Subsidiaries BAE Systems Hägglunds ''AB Hägglund & Söner'' was founded in 1899 by Johan Hägglund in Gullänget, Örnsköldsvik, Sweden. The company was divided in 1988, one part being ''Hägglunds Vehicle AB'', the military vehicles business. In October 1997 the British company Alvis plc acquired Hägglunds Vehicle AB to form Alvis Hägglunds AB. Alvis expanded its military vehicle business in 1998 with the purchase of GKN's armoured vehicle division in 1998 and Vickers Defence in 2002 to form Alvis Vickers. In September 2004 BAE Systems acquired Alvis Vickers and merged it with its RO Defence ordnance division to form BAE Systems Land Systems. Hägglunds was renamed Land Systems Hägglunds. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birmingham
Birmingham ( ) is a city and metropolitan borough in the metropolitan county of West Midlands in England. It is the second-largest city in the United Kingdom with a population of 1.145 million in the city proper, 2.92 million in the West Midlands metropolitan county, and approximately 4.3 million in the wider metropolitan area. It is the largest UK metropolitan area outside of London. Birmingham is known as the second city of the United Kingdom. Located in the West Midlands region of England, approximately from London, Birmingham is considered to be the social, cultural, financial and commercial centre of the Midlands. Distinctively, Birmingham only has small rivers flowing through it, mainly the River Tame and its tributaries River Rea and River Cole – one of the closest main rivers is the Severn, approximately west of the city centre. Historically a market town in Warwickshire in the medieval period, Birmingham grew during the 18th century during the Midla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolseley Motors
Wolseley Motors Limited was a British motor vehicle manufacturer founded in early 1901 by the Vickers Armaments in conjunction with Herbert Austin. It initially made a full range, topped by large luxury cars, and dominated the market in the Edwardian era. The Vickers brothers diedin 1914 and 1919 respectively and, without their guidance, Wolseley expanded rapidly after the war, manufacturing 12,000 cars in 1921, and remained the biggest motor manufacturer in Britain. Over-expansion led to receivership in 1927 when it was bought from Vickers Limited by William Morris as a personal investment. He moved it into his Morris Motors empire just before the Second World War. After that, Wolseley products were "badge-engineered" Morris cars. Wolseley went with its sister businesses into BMC, BMH and British Leyland, where its name lapsed in 1975. Founding 1901 File:Herbert Austin 1905.jpg, Herbert Austin (1866–1941) in 1905 File:Colonel-thomas-edward-vickers-1896.jp.jpg, Col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terra Nova Expedition
The ''Terra Nova'' Expedition, officially the British Antarctic Expedition, was an expedition to Antarctica which took place between 1910 and 1913. Led by Captain Robert Falcon Scott, the expedition had various scientific and geographical objectives. Scott wished to continue the scientific work that he had begun when leading the ''Discovery'' Expedition from 1901 to 1904, and wanted to be the first to reach the geographic South Pole. He and four companions attained the pole on 17 January 1912, where they found that a Norwegian team led by Roald Amundsen had preceded them by 34 days. Scott's party of five died on the return journey from the pole; some of their bodies, journals, and photographs were found by a search party eight months later. The expedition, named after its supply ship, was a private venture financed by public contributions and a government grant. It had further backing from the Admiralty, which released experienced seamen to the expedition, and from the Royal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reginald Skelton
Sir Reginald William Skelton (3 June 1872 – 5 September 1956) was a British vice-admiral and engineer who served as chief engineer and official photographer of the 1901-1904 Discovery Expedition to Antarctica. Early life Skelton was born at Long Sutton, Lincolnshire, and educated at Bromsgrove School, Worcestershire. He joined the Royal Navy in 1887 and until 1892 studied at the Royal Naval Engineering College at Keyham, Devon. Once commissioned he served on HMS ''Centurion'' in China from 1894 to 1897 and HMS ''Majestic'' of the Channel Squadron from 1899 to 1900 before being appointed to supervise the building of the ''Discovery'' for the 1901 National Antarctic Expedition. Polar exploration Scott, the expedition leader, had been impressed with Skelton's engineering abilities aboard the Majestic and so he was appointed Chief Engineer of the expedition. He also acted as expedition photographer. Nicknamed 'Skelly', there were no serious difficulties with any of the machinery ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Falcon Scott
Captain Robert Falcon Scott, , (6 June 1868 – c. 29 March 1912) was a British Royal Navy officer and explorer who led two expeditions to the Antarctic regions: the ''Discovery'' expedition of 1901–1904 and the ill-fated ''Terra Nova'' expedition of 1910–1913. On the first expedition, he set a new southern record by marching to latitude 82°S and discovered the Antarctic Plateau, on which the South Pole is located. On the second venture, Scott led a party of five which reached the South Pole on 17 January 1912, less than five weeks after Amundsen's South Pole expedition. A planned meeting with supporting dog teams from the base camp failed, despite Scott's written instructions, and at a distance of 162 miles (261 km) from their base camp at Hut Point and approximately 12.5 miles (20 km) from the next depot, Scott and his companions died. When Scott and his party's bodies were discovered, they had in their possession the first Antarctic fossils ever discov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Condensation
Condensation is the change of the state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle. It can also be defined as the change in the state of water vapor to liquid water when in contact with a liquid or solid surface or cloud condensation nuclei within the atmosphere. When the transition happens from the gaseous phase into the solid phase directly, the change is called deposition. Initiation Condensation is initiated by the formation of atomic/molecular clusters of that species within its gaseous volume—like rain drop or snow flake formation within clouds—or at the contact between such gaseous phase and a liquid or solid surface. In clouds, this can be catalyzed by water-nucleating proteins, produced by atmospheric microbes, which are capable of binding gaseous or liquid water molecules. Reversibility scenarios A few distinct reversibility scenarios emerge here with respect to the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Chill
Wind chill or windchill (popularly wind chill factor) is the lowering of body temperature due to the passing-flow of lower-temperature air. Wind chill numbers are always lower than the air temperature for values where the formula is valid. When the apparent temperature is higher than the air temperature, the heat index is used instead. Explanation A surface loses heat through conduction, evaporation, convection, and radiation. The rate of convection depends on both the difference in temperature between the surface and the fluid surrounding it and the velocity of that fluid with respect to the surface. As convection from a warm surface heats the air around it, an insulating boundary layer of warm air forms against the surface. Moving air disrupts this boundary layer, or epiclimate, allowing for cooler air to replace the warm air against the surface. The faster the wind speed, the more readily the surface cools. Alternative approaches Many formulas exist for wind chill beca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weather
Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, just below the stratosphere. Weather refers to day-to-day temperature, precipitation, and other atmospheric conditions, whereas climate is the term for the averaging of atmospheric conditions over longer periods of time. When used without qualification, "weather" is generally understood to mean the weather of Earth. Weather is driven by air pressure, temperature, and moisture differences between one place and another. These differences can occur due to the Sun's angle at any particular spot, which varies with latitude. The strong temperature contrast between polar and tropical air gives rise to the largest scale atmospheric circulations: the Hadley cell, the Ferrel cell, the polar cell, and the jet stream. Weather system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat Bog
A bog or bogland is a wetland that accumulates peat as a deposit of dead plant materials often mosses, typically sphagnum moss. It is one of the four main types of wetlands. Other names for bogs include mire, mosses, quagmire, and muskeg; alkaline mires are called fens. A baygall is another type of bog found in the forest of the Gulf Coast states in the United States.Watson, Geraldine Ellis (2000) ''Big Thicket Plant Ecology: An Introduction'', Third Edition (Temple Big Thicket Series #5). University of North Texas Press. Denton, Texas. 152 pp. Texas Parks and Wildlife. Ecological Mapping systems of Texas: West Gulf Coastal Plain Seepage Swamp and Baygall'. Retrieved 7 July 2020 They are often covered in heath or heather shrubs rooted in the sphagnum moss and peat. The gradual accumulation of decayed plant material in a bog functions as a carbon sink. Bogs occur where the water at the ground surface is acidic and low in nutrients. In contrast to fens, they derive most of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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