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Snowcat
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tucker Sno-Cat
The Tucker Sno-Cat is a family of tracked vehicles for snow conditions, manufactured in Medford, Oregon by the company of the same name. Different models have been used for expeditions in the Arctic and the Antarctic during the second half of the 20th century. It differs from other truck-sized snow vehicles, commonly known as snowcats, by its use of four independently mounted sets of tracks. Early models While the majority of Tucker Sno-Cats utilized four sets of tracks, a few experimental models and early production models used two sets of tracks. Initially Tucker Sno-Cats employed two front-mounted steering skis and two sets of tracks mounted to the rear. However, there are at least three production models that only employed dual tracks—the small 222 Tucker Kitten, the 322, and the 323 models were all two-track Tucker Sno-Cats with a conventional front engine design. There are at least two variants of the Tucker Kitten, some have square corner doors while others have r ... [...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] |
Continuous Track
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] |
Piste
A ''piste'' () is a marked ski run or path down a mountain for snow skiing, snowboarding, or other mountain sports. This European term is FrenchEnglish language ''Fédération Internationale de Ski'' (FIS) website ("trail", "track") and synonymous with 'trail', 'slope', or 'run' in North America. The word is pronounced using a long "e" sound so that it rhymes with "beast". North Americans employ its common European antonym, 'off piste', to describe , especially when referring to skiing outside officially approved areas of a [...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, ... [...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 Mi ... [...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] |
Rubber
Rubber, also called India rubber, latex, Amazonian rubber, ''caucho'', or ''caoutchouc'', as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds. Thailand, Malaysia, and Indonesia are three of the leading rubber producers. Types of polyisoprene that are used as natural rubbers are classified as elastomers. Currently, rubber is harvested mainly in the form of the latex from the rubber tree (''Hevea brasiliensis'') or others. The latex is a sticky, milky and white colloid drawn off by making incisions in the bark and collecting the fluid in vessels in a process called "tapping". The latex then is refined into the rubber that is ready for commercial processing. In major areas, latex is allowed to coagulate in the collection cup. The coagulated lumps are collected and processed into dry forms for sale. Natural rubber is used extensively in many applications and products, either alone or in combination ... [...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 disc ... [...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 t ... [...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 bec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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