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British Rail Class 769
The British Rail Class 769 ''Flex'' is a type of bi-mode multiple unit (BMU) and tri-mode multiple unit (TMU) which is currently being converted by Brush Traction, and running in service with Transport for Wales Rail and Northern Trains. The train is a conversion of the existing electric multiple unit (EMU), a conventional unit type which had become surplus to requirements during the 2010s. The conversion process is carried out by a partnership between the rolling stock leasing company Porterbrook and train manufacturer Brush Traction. The conversion principally involves the addition of a pair of MAN diesel engines (one under each driving trailer vehicle), the output of which is fed into ABB-provided alternators to power the existing electric traction systems. According to Porterbrook, the Class 769's performance under diesel power is either equal or superior to that of a Class 150 Sprinter diesel multiple unit (DMU), and the switchover between EMU and DMU modes can be carrie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KeolisAmey Wales
Keolis Amey Operations ( cy, Gweithrediadau KeolisAmey), Full legal name is bilingual including the Welsh name, as "Keolis Amey Operations / Gweithrediadau Keolis Amey Limited". trading as Transport for Wales Rail Services (TfW Rail Services) was a Welsh train operating company owned by Keolis (60%) and Amey plc, Amey (40%) that operated the Wales & Borders franchise between October 2018 and February 2021. The Welsh Government body Transport for Wales awarded the contract for the Wales and Borders franchise to KeolisAmey in 2018 which commenced rail operations on 14 October 2018. KeolisAmey used the brand names Transport for Wales and TfW Rail ( cy, Trafnidiaeth Cymru and ), which are owned by the Welsh Government, for day-to-day operations. The Welsh Government nationalised the franchise on 7 February 2021, transferring operations to Transport for Wales Rail, although KeolisAmey continues to provide an infrastructural role in the franchise. History In October 2016 four bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Third Rail
A third rail, also known as a live rail, electric rail or conductor rail, is a method of providing electric power to a railway locomotive or train, through a semi-continuous rigid conductor placed alongside or between the rails of a railway track. It is used typically in a mass transit or rapid transit system, which has alignments in its own corridors, fully or almost fully segregated from the outside environment. Third rail systems are usually supplied from direct current electricity. Modern tram systems, street-running, avoid the risk of electrocution by the exposed electric rail by implementing a segmented ground-level power supply, where each segment is electrified only while covered by a vehicle which is using its power. The third-rail system of electrification is not related to the third rail used in dual gauge railways. Description Third-rail systems are a means of providing electric traction power to trains using an additional rail (called a "conductor rail") ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BREL (BREL, 1969–1989), defunct railway systems engineering company
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Brel may refer to: *Andrew Brel (born Andreas Broulidakis 28 September 1960), UK music producer *Jacques Brel (1929-1978), French-speaking Belgian singer *Daniel Brel (b. 1950), French accordionist *British Rail Engineering Limited British Rail Engineering Limited (BREL) was the railway systems engineering subsidiary of British Rail. Established in 1970, the maintenance arm was split as British Rail Maintenance Limited in 1987, and the design and building of trains was pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel Multiple Unit
A diesel multiple unit or DMU is a multiple-unit train powered by on-board diesel engines. A DMU requires no separate locomotive, as the engines are incorporated into one or more of the carriages. Diesel-powered single-unit railcars are also generally classed as DMUs. Diesel-powered units may be further classified by their transmission type: diesel–mechanical DMMU, diesel–hydraulic DHMU, or diesel–electric DEMU. Design The diesel engine may be located above the frame in an engine bay or under the floor. Driving controls can be at both ends, on one end, or in a separate car. Types by transmission DMUs are usually classified by the method of transmitting motive power to their wheels. Diesel–mechanical In a diesel–mechanical multiple unit (DMMU), the rotating energy of the engine is transmitted via a gearbox and driveshaft directly to the wheels of the train, like a car. The transmissions can be shifted manually by the driver, as in the great majority of first-gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Class 150
The British Rail Class 150 ''Sprinter'' is a class of diesel multiple unit passenger trains; they were developed and constructed by BREL York between 1984 and 1987 for use on regional services across the UK. The type is a second-generation design, built to more modern standards and based on BR's Mark 3 body design for longer-distance services. It was developed alongside the lower-cost ''Pacers'', which were built using bus parts, for use on short-distance services. Two prototype units were built, followed by 135 production units in two batches. Subsequently, further members of the Sprinter family were also developed and introduced to service, including the Class 155, Class 156, Class 158 and Class 159. Background By the beginning of the 1980s, British Rail (BR) was operating a large fleet of first-generation DMUs of various designs. While formulating its long-term strategy for this sector of its operations, BR planners recognised that there would be considerable costs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alternator
An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current. For reasons of cost and simplicity, most alternators use a rotating magnetic field with a stationary armature.Gordon R. Selmon, ''Magnetoelectric Devices'', John Wiley and Sons, 1966 no ISBN pp. 391-393 Occasionally, a linear alternator or a rotating armature with a stationary magnetic field is used. In principle, any AC electrical generator can be called an alternator, but usually the term refers to small rotating machines driven by automotive and other internal combustion engines. An alternator that uses a permanent magnet for its magnetic field is called a magneto. Alternators in power stations driven by steam turbines are called turbo-alternators. Large 50 or 60 Hz three-phase alternators in power plants generate most of the world's electric power, which is distributed by electric power grids. History Alternating current generating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel Engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-called compression-ignition engine (CI engine). This contrasts with engines using spark plug-ignition of the air-fuel mixture, such as a petrol engine ( gasoline engine) or a gas engine (using a gaseous fuel like natural gas or liquefied petroleum gas). Diesel engines work by compressing only air, or air plus residual combustion gases from the exhaust (known as exhaust gas recirculation (EGR)). Air is inducted into the chamber during the intake stroke, and compressed during the compression stroke. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel injected into the combustion chamber ignites. With the fuel being injected into the air just before combustion, the dispersion of the fuel is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Multiple Unit
An electric multiple unit or EMU is a multiple-unit train consisting of self-propelled carriages using electricity as the motive power. An EMU requires no separate locomotive, as electric traction motors are incorporated within one or a number of the carriages. An EMU is usually formed of two or more semi-permanently coupled carriages, but electrically powered single-unit railcars are also generally classed as EMUs. The great majority of EMUs are passenger trains, but versions also exist for carrying mail. EMUs are popular on commuter and suburban rail networks around the world due to their fast acceleration and pollution-free operation. Being quieter than diesel multiple units (DMUs) and locomotive-hauled trains, EMUs can operate later at night and more frequently without disturbing nearby residents. In addition, tunnel design for EMU trains is simpler as no provision is needed for exhausting fumes, although retrofitting existing limited-clearance tunnels to accommodate the ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rail (magazine)
''Rail'' is a British magazine on the subject of current rail transport in Great Britain. It is published every two weeks by Bauer Consumer Media and can be bought from the travel sections of UK newsstands. It is targeted primarily at the enthusiast market, but also covers issues relating to rail transport. ''Rail'' is more than four decades old, and was called ''Rail Enthusiast'' from its launch in 1981 until 1988. It is one of only two railway magazines that increased its circulation. It has roughly the same cover design for several years, with a capitalised italic red ''RAIL'' along the top of the front cover. Editorial policy ''Rail'' is customarily critical of railway institutions, including the Rail Delivery Group, the Office of Rail and Road, as well as, since it assumed greater railway powers, the Department for Transport. ''Rail's'' continuing campaigns include one against advertising and media images showing celebrities and others walking between the rails (an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electro-diesel Multiple Unit
An electro-diesel multiple unit (EDMU) or bi-mode multiple unit (BMU) is a form of a multiple unit that can be powered either by electric power picked up from the overhead lines or third rail (like an electric multiple unit – EMU) or by using an onboard diesel engine, driving an electric generator, which produces AC or DC electric power (like a diesel-electric multiple unit – DEMU). List of BMUs Asia China Two variants of the China Railway CR200J-SG Fuxing (HXD1D-J and FXN3-J) high-speed train are electro-diesel (bi-mode) multiple units specifically designed for plateau operation. They are HXD1D-J manufactured by CRRC Zhuzhou Locomotive and FXN3-J manufactured by CRRC Dalian. Two variants are served on Sichuan–Tibet railway. Oceania Australia NSW TrainLink Regional Train Project is building 117 bi-mode carriages (1.5kV DC) to replace its diesel fleet of interstate and regional XPT, Xplorer and Endeavour trainsets to be delivered by CAF from 2023. Europe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tightlock Coupling
Type H Tightlock couplers are a variety of Janney coupler, typically used on North American mainline passenger rail cars. They are designed with mechanical features which reduce slack in normal operation and prevent telescoping in derailments, yet remain compatible with other Janney types used by North American freight railroads. Like all Janney couplers, the Tightlock is "semi-automatic" with the couplers on cars or locomotives automatically locking when cars are pushed together. However, most tightlock couplers are not fully automatic, as workers still need to go between cars to hook up the air lines for the pneumatic brakes, and connect cables for head-end power and other communications. Also, to separate cars, a worker needs to use a lever to move the locking pin that keeps the coupler closed. In Europe, some operators experimented with making fully automatic tightlock couplers by adding integral pneumatic and electric connectors, but these connections experienced reliabi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Train Protection & Warning System
The Train Protection & Warning System (TPWS) is a train protection system used throughout the British passenger main-line railway network, and in Victoria, Australia. The British Rail Safety and Standards Board's definition is: The purpose of TPWS is to stop a train by automatically initiating a brake demand, where TPWS track equipment is fitted, if the train has: *passed a signal at danger without authority *approached a signal at danger too fast *approached a reduction in permissible speed too fast *approached buffer stops too fast. TPWS is not designed to prevent SPADs but to mitigate the consequences of a SPAD, by preventing a train that has had a SPAD from reaching a conflict point after the signal. A standard installation consists of an on-track transmitter adjacent to a signal, activated when the signal is at danger. A train that passes the signal will have its emergency brake activated. If the train is travelling at speed, this may be too late to stop it before the poin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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