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Boeing RC-1
The Boeing RC-1, short for "Resource Carrier 1", was a design for an enormous cargo aircraft intended to haul oil and minerals out of the northern reaches of Alaska and Canada where ice-free ports were not available. It was optimized for short-haul missions only, carrying cargo to locations for loading onto ships, trains or pipelines. Depending on the role, the design was nicknamed "Brute Lifter" or "Flying Pipeline". The basic design had a rectangular wing spanning almost , was powered by 12 Pratt & Whitney JT9D engines, and had 56 wheels in the main landing gear. A total of of cargo was carried in two under-wing pods and fuselage. The RC-1 would have been roughly twice the size and mass of the Antonov An-225 Mriya, the largest aircraft built, but would have carried about five times the payload. The RC-1 was designed in the early 1970s. The rapid increase in jet fuel prices after 1973 caused the project to become uneconomical. History Early concepts The RC-1 concept traces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing 747SP
The Boeing 747SP (for ''Special Performance'') is a shortened version of the Boeing 747 wide-body airliner, designed for a longer range. Boeing needed a smaller aircraft to compete with the McDonnell Douglas DC-10 and Lockheed L-1011 TriStar tri-jet wide-bodies, introduced in 1971/1972. Pan Am requested a 747-100 derivative to fly between New York and the Middle East, a request also shared by Iran Air, and the first order came from Pan Am in 1973. The variant first flew on July 4, 1975, was approved by the Federal Aviation Administration on February 4, 1976, and entered service that year with Pan Am. The SP is in length, shorter than the original 747 variants. Its main deck doors are reduced to four on each side to suit its lower capacity. The vertical and horizontal tailplane are larger and its wing flaps have been simplified. With a maximum take-off weight, it can fly 276 passengers in three classes over . One 747SP was modified into the Stratospheric Observatory for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prime Minister Of Canada
The prime minister of Canada (french: premier ministre du Canada, link=no) is the head of government of Canada. Under the Westminster system, the prime minister governs with the Confidence and supply, confidence of a majority the elected House of Commons of Canada, House of Commons; as such, the prime minister typically sits as a Member of Parliament (Canada), member of Parliament (MP) and leads the largest party or a coalition of parties. As List of current Canadian first ministers, first minister, the prime minister selects ministers to form the Cabinet of Canada, Cabinet, and serves as its chair. Constitutionally, Government of Canada#Crown, the Crown exercises Executive (government), executive power on the Advice (constitutional law), advice of the Cabinet, which is collectively Responsible government, responsible to the House of Commons. Justin Trudeau is the List of prime ministers of Canada, 23rd and current prime minister of Canada. He took office on November 4, 2015 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alberta
Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Territories (NWT) to the north, and the U.S. state of Montana to the south. It is one of the only two landlocked provinces in Canada (Saskatchewan being the other). The eastern part of the province is occupied by the Great Plains, while the western part borders the Rocky Mountains. The province has a predominantly continental climate but experiences quick temperature changes due to air aridity. Seasonal temperature swings are less pronounced in western Alberta due to occasional Chinook winds. Alberta is the fourth largest province by area at , and the fourth most populous, being home to 4,262,635 people. Alberta's capital is Edmonton, while Calgary is its largest city. The two are Alberta's largest census metropolitan areas. More tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cochrane, Ontario
Cochrane is a town in northeastern Ontario, Canada. It is located east of Kapuskasing, northeast of Timmins, south of Moosonee, and north of Iroquois Falls. It is about a one-hour drive from Timmins, the major city of the region. It is the seat of Cochrane District. The town's population is made up of about half anglophone and half francophone residents. History Before Cochrane was founded, it was used as a summer camping ground by indigenous people, and a stopping place for fur traders travelling to Moose Factory. In the early 20th century, the National Transcontinental Railway was built through the area, and in 1907, the place was selected as the junction point with the Temiskaming and Northern Ontario Railway. In November 1908, the lots were sold by auction and a railway town formed.Ontario Heritage Foundation, Ministry of Culture and Communications It was incorporated on January 1, 1910, and named for politician and merchant Frank Cochrane, a former mayor of Sudbury and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mackenzie Valley Pipeline
The Mackenzie Valley Pipeline, also called the Mackenzie River Pipeline, was a proposed project to transport natural gas from the Beaufort Sea through Canada's Northwest Territories to tie into gas pipelines in northern Alberta. The project was first proposed in the early 1970s but was scrapped following an inquiry conducted by Justice Thomas Berger. The project was resurrected in 2004 with a new proposal to transport gas through the sensitive arctic tundra. Probabilistic estimates of hydrocarbons in the Mackenzie Delta and Beaufort Sea regions project that there are natural gas reserves of . After many delays, the project was officially abandoned in 2017 by the main investment partners citing natural gas prices and the long regulatory process. History The prospect of a pipeline bringing the natural gas to North American energy markets was originally analyzed in the 1970s with the Mackenzie Valley Pipeline Inquiry. During that inquiry, Justice Berger heard testimony from div ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liquified Natural Gas
Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4, with some mixture of ethane, C2H6) that has been cooled down to liquid form for ease and safety of non-pressurized storage or transport. It takes up about 1/600th the volume of natural gas in the gaseous state (at standard conditions for temperature and pressure). LNG is odorless, Transparency and translucency, colorless, toxicity, non-toxic and Corrosive substance, non-corrosive. Hazards include flammability after vaporization into a gaseous state, freezing and asphyxia. The Liquefaction of gases, liquefaction process involves removal of certain components, such as dust, acid gases, helium, water, and heavy hydrocarbons, which could cause difficulty downstream. The natural gas is then condensation, condensed into a liquid at close to atmospheric pressure by cooling it to approximately ; maximum transport pressure is set at around (gauge pressure), which is about one-fourth times atmospheric pressure at se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methane
Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The relative abundance of methane on Earth makes it an economically attractive fuel, although capturing and storing it poses technical challenges due to its gaseous state under normal conditions for temperature and pressure. Naturally occurring methane is found both below ground and under the seafloor and is formed by both geological and biological processes. The largest reservoir of methane is under the seafloor in the form of methane clathrates. When methane reaches the surface and the atmosphere, it is known as atmospheric methane. The Earth's atmospheric methane concentration has increased by about 150% since 1750, and it accounts for 20% of the total radiative forcing from all of the long-lived and globally mixed greenhouse gases. It has also been detected on other plane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wave Drag
In physics, mathematics, and related fields, a wave is a propagating dynamic disturbance (change from equilibrium) of one or more quantities. Waves can be periodic, in which case those quantities oscillate repeatedly about an equilibrium (resting) value at some frequency. When the entire waveform moves in one direction, it is said to be a ''traveling wave''; by contrast, a pair of superimposed periodic waves traveling in opposite directions makes a ''standing wave''. In a standing wave, the amplitude of vibration has nulls at some positions where the wave amplitude appears smaller or even zero. Waves are often described by a ''wave equation'' (standing wave field of two opposite waves) or a one-way wave equation for single wave propagation in a defined direction. Two types of waves are most commonly studied in classical physics. In a ''mechanical wave'', stress and strain fields oscillate about a mechanical equilibrium. A mechanical wave is a local deformation (strain) in s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swept Wing
A swept wing is a wing that angles either backward or occasionally forward from its root rather than in a straight sideways direction. Swept wings have been flown since the pioneer days of aviation. Wing sweep at high speeds was first investigated in Germany as early as 1935 by Albert Betz and Adolph Busemann, finding application just before the end of the Second World War. It has the effect of delaying the shock waves and accompanying aerodynamic drag rise caused by fluid compressibility near the speed of sound, improving performance. Swept wings are therefore almost always used on jet aircraft designed to fly at these speeds. The term "swept wing" is normally used to mean "swept back", but variants include forward sweep, variable sweep wings and oblique wings in which one side sweeps forward and the other back. The delta wing is also aerodynamically a form of swept wing. Reasons for sweep There are three main reasons for sweeping a wing: 1. to arrange the center of gravity ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landing Gear
Landing gear is the undercarriage of an aircraft or spacecraft that is used for takeoff or landing. For aircraft it is generally needed for both. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin Company. For aircraft, Stinton makes the terminology distinction ''undercarriage (British) = landing gear (US)''. For aircraft, the landing gear supports the craft when it is not flying, allowing it to take off, land, and taxi without damage. Wheeled landing gear is the most common, with skis or floats needed to operate from snow/ice/water and skids for vertical operation on land. Faster aircraft have retractable undercarriages, which fold away during flight to reduce drag. Some unusual landing gear have been evaluated experimentally. These include: no landing gear (to save weight), made possible by operating from a catapult cradle and flexible landing deck: air cushion (to enable operation over a wide range of ground obstacles and wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salekhard–Igarka Railway
The broad gauge Salekhard–Igarka Railway, ( ''Transpolyarnaya Magistral'', i.e. 'Transpolar Mainline') also referred to variously as ''Dead Road (')'', and ''Stalinbahn'', is an incomplete railway in northern Siberia. The railway was a project of the Soviet Gulag system that took place from 1947 until Stalin's death in 1953. Construction was coordinated via two separate Gulag projects, the ''501 Railway'' beginning on the River Ob and ''503 Railway'' beginning on the River Yenisey, part of a grand design of Joseph Stalin to span a railway across northern Siberia to reach the Soviet Union's easternmost territories. The planned route from Igarka to Salekhard measured in length. The project was built mostly with prisoner labour, particularly that of political prisoners, and a large number perished. A rebuilt section of the railway between Nadym and Novy Urengoy on the east bank of the Nadym River is still in operation, as is the extreme western section connecting Labytnangi and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tundra
In physical geography, tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. The term ''tundra'' comes through Russian (') from the Kildin Sámi word (') meaning "uplands", "treeless mountain tract". There are three regions and associated types of tundra: Arctic tundra, alpine tundra, and Antarctic tundra. Tundra vegetation is composed of dwarf shrubs, sedges, grasses, mosses, and lichens. Scattered trees grow in some tundra regions. The ecotone (or ecological boundary region) between the tundra and the forest is known as the tree line or timberline. The tundra soil is rich in nitrogen and phosphorus. The soil also contains large amounts of biomass and decomposed biomass that has been stored as methane and carbon dioxide in the permafrost, making the tundra soil a carbon sink. As global warming heats the ecosystem and causes soil thawing, the permafrost carbon cycle accelerates and releases much of these soil-contained g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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