|
Virginian EL-C
The Virginian EL-C, later known as the New Haven EF-4 and E33, was an electric locomotive built for the Virginian Railway by General Electric in August 1955. They were the first successful production locomotives to use Ignitron Mercury arc valve, (mercury arc) rectifier technology. Although they proved to be a successful design, no more EL-Cs were built, due to the small number of railroads that had railway electrification system, electrification and the advent of improved electric locomotive technology. They were among the last mainline electric freight locomotives in the United States. Background In the mid-1920s the Virginian Railway had adopted an 11 kV 25 Hz AC electrification for its coal-heavy main line between Mullens, West Virginia and Roanoke, Virginia. To work this line the Virginian bought 36 VGN EL-3A, EL-3A boxcab locomotives from Westinghouse Electric Corporation, Westinghouse. The Virginian added four VGN EL-2B, EL-2B locomotives from General Electric after World ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virginia Museum Of Transportation
The Virginia Museum of Transportation is a museum devoted to the topic of transportation located in Downtown Roanoke, Virginia, US. children under two years do not to buy tickets and students can get a discounted $10.5 ticket. History The Virginia Museum of Transportation began its life in 1963 as the Roanoke Transportation Museum located in Wasena Park in Roanoke, Virginia. The museum at that time was housed in an old Norfolk & Western Railway freight depot on the banks of the Roanoke River. The earliest components of the museum's collection included a United States Army Jupiter rocket and the J class steam locomotive No. 611, donated by Norfolk & Western Railway to the City of Roanoke where many of its engines were constructed. The museum expanded its collection to include other pieces of rail equipment such as a former DC Transit PCC streetcar, and a number of horse-drawn vehicles including a hearse, a covered wagon, and a Studebaker wagon. In November 1985, a flood nearly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boxcab
A boxcab, in railroad terminology, is a locomotive in which the machinery and crew areas are enclosed in a box-like superstructure (from boxcar). It is a term mostly used in North America while in Victoria (Australia), such locomotives have been nicknamed "butterboxes" (Victorian Railways second series "E" Class electric locomotives numbered E1102 to E1111). Boxcabs may use any source of power but most are diesel or electric locomotives. Few steam locomotives are so described but the British SR Leader class was a possible exception. Most American boxcabs date from before World War II, when the earliest boxcabs were often termed "oil-electrics" to avoid the use of the German name "Diesel" due to propaganda purposes. Styling Boxcabs do not have heavily styled ends, or a superstructure consisting of multiple boxy structures, although the prototype diesel/oil-electric, GE #8835, had one prominently-rounded nose (from its trolley (tram) car ancestry) and the second and following 10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PC 4602 (12989584644)
PC or pc may refer to: Arts and entertainment * Player character or playable character, a fictional character controlled by a human player, usually in role-playing games or computer games * '' Port Charles'', an American daytime TV soap opera * Production code number, a designation used to identify television episodes * ''Pretty Cure'', a Japanese anime franchise Business and finance * Percentage (pc), numeric ratio signifier * Prime cost or variable cost * Principal Consultant, a management consulting position * Professional corporation, a type of corporate entity for licensed professionals (attorneys, architects, physicians, engineers, etc.) Organizations Businesses * Pearl-Continental Hotels & Resorts, a hotel chain in Pakistan * Pirelli & C. (stock symbol: PC) * President's Choice, a private label product brand of the Canadian supermarket chain Loblaw Companies ** PC Mobile, a Canadian mobile virtual network operator ** PC Optimum, a Canadian rewards program ** President ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Co-Co Locomotives
Co-Co is the wheel arrangement for diesel or electric locomotives with two six-wheeled bogies with all axles powered, with a separate traction motor per axle. The equivalent UIC classification (Europe) for this arrangement is Co′Co′, or C-C for AAR (North America). Use Co-Cos are most suited to freight work as the extra wheels give them good traction. They are also popular because the greater number of axles results in a lower axle load to the track. History The first mainline diesel-electric locomotives were of Bo-Bo arrangement. As they grew in power and weight, from 1937 the EMD E-units used an A1A-A1A layout with six axles to reduce axle load, but only four of them were powered. After WWII, the British LMS ordered two prototype locomotives with some of the first Co-Co arrangements. The first C-C design recorded was a narrow-gauge Hornsby opposed-piston Hornsby-Akroyd-engined locomotive of 1903 for the Chattenden and Upnor Railway. There was a two-speed mec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inductor
An inductor, also called a coil, choke, or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. An inductor typically consists of an insulated wire wound into a coil. When the current flowing through the coil changes, the time-varying magnetic field induces an electromotive force (''emf'') (voltage) in the conductor, described by Faraday's law of induction. According to Lenz's law, the induced voltage has a polarity (direction) which opposes the change in current that created it. As a result, inductors oppose any changes in current through them. An inductor is characterized by its inductance, which is the ratio of the voltage to the rate of change of current. In the International System of Units (SI), the unit of inductance is the henry (H) named for 19th century American scientist Joseph Henry. In the measurement of magnetic circuits, it is equivalent to . Inductors have values that typically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rectifier
A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The reverse operation (converting DC to AC) is performed by an Power inverter, inverter. The process is known as ''rectification'', since it "straightens" the direction of current. Physically, rectifiers take a number of forms, including Vacuum tube#Diodes, vacuum tube diodes, wet chemical cells, mercury-arc valves, stacks of copper and selenium rectifier, selenium oxide plates, Diode#Semiconductor diodes, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motor-generator sets have been used. Early radio receivers, called crystal radios, used a "Cat's-whisker detector, cat's whisker" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or "crystal detec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Current
Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current. The abbreviations ''AC'' and ''DC'' are often used to mean simply ''alternating'' and ''direct'', as when they modify ''current'' or ''voltage''. Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be converted into alternating current via an inverter. Direct current has many uses, from the charging of batteries to large power sup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PRR E3b
PRR may refer to: * Parietal reach region, of the human brain * Pattern recognition receptor, receptors of the innate immune system that identify pathogen-associated molecular patterns * Pennsylvania Railroad (reporting mark), an American railroad * Personal Role Radio, a radio carried by UK troops * Populist radical right, a loose collection of political ideologies * Porsche Rennsport Reunion, an automotive event * Princes Risborough railway station (National Rail station code), England * Production Rule Representation, a proposed computing standard * Proportional reporting ratio, a statistic used in data mining for health surveillance systems * Pseudo-response regulator, a group of genes that are important in the circadian oscillator of plants * Pure Reason Revolution, a British rock group formed in 2003 See also * PRRS (other) PRRS can refer to: * Porcine reproductive and respiratory syndrome, a disease of pigs * Radical Socialist Republican Party, a former Spanish pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PRR E2c
Pennsylvania Railroad class E3c comprised a pair of experimental C-C (AAR) or Co-Co ( UIC) electric locomotives. The bodywork and running gear was produced by Baldwin-Lima-Hamilton while the electrical equipment was provided by Westinghouse, who also acted as principal contractor. In 1952 the Pennsylvania Railroad took delivery of eight experimental locomotives, four from General Electric and four from Westinghouse. While GE's were all of the same class ( E2b), the Westinghouse locomotives were split into two classes. Two locomotives had three two-axle trucks ( E3b). The significant technical difference between the locomotives was that those from General Electric used traditional AC traction motors. Those by Westinghouse had mercury arc rectifiers to convert the AC traction power to DC. In consequence they were able to use ordinary DC traction motors, identical to those on contemporary diesel-electric locomotives. The locomotives were scrap Scrap consists of Recycling, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rectifier
A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The reverse operation (converting DC to AC) is performed by an Power inverter, inverter. The process is known as ''rectification'', since it "straightens" the direction of current. Physically, rectifiers take a number of forms, including Vacuum tube#Diodes, vacuum tube diodes, wet chemical cells, mercury-arc valves, stacks of copper and selenium rectifier, selenium oxide plates, Diode#Semiconductor diodes, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motor-generator sets have been used. Early radio receivers, called crystal radios, used a "Cat's-whisker detector, cat's whisker" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or "crystal detec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ignitron
An ignitron is a type of gas-filled tube used as a controlled rectifier and dating from the 1930s. Invented by Joseph Slepian while employed by Westinghouse, Westinghouse was the original manufacturer and owned trademark rights to the name "Ignitron". Ignitrons are closely related to mercury-arc valves but differ in the way the arc is ignited. They function similarly to thyratrons; a triggering pulse to the igniter electrode turns the device "on", allowing a high current to flow between the cathode and anode electrodes. After it is turned on, the current through the anode must be reduced to zero to restore the device to its nonconducting state. They are used to switch high currents in heavy industrial applications. Construction and operation An ignitron is usually a large steel container with a pool of mercury in the bottom that acts as a cathode during operation. A large graphite or refractory metal cylinder, held above the pool by an insulated electrical connection, serves as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dieselisation
Dieselisation (US: dieselization) is the process of equipping vehicles with a diesel engine or diesel engines. It can involve replacing an internal combustion engine powered by petrol (gasoline) fuel with an engine powered by diesel fuel, as occurred on a large scale with trucks, buses, farm tractors, and building construction machinery after the Second World War. Alternatively it can involve replacing the entire plant or vehicle with one that is diesel-powered; the term commonly describes the generational replacement between the 1930s and the 1970s of railway steam locomotives with diesel locomotives, and associated facilities. Water transport The Two-stroke diesel engine for marine applications was introduced in 1908 and remains in use today. It is the most efficient prime mover to date, models such as the Wärtsilä-Sulzer RTA96-C offer a thermal efficiency of 50% and over 100,000 horsepowers. First steps towards conversions using diesel engines as means of propulsion (on sm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Virginian EL-C")
