DMU, type SA108 of Great Poland Voivodship in Poznań, Poland

The Transwa Prospector DEMU capable of up to 200 km/h provides a passenger service between Perth, Western Australia and the mining town of Kalgoorlie

A Diesel Multiple Unit or DMU is a multiple unit train consisting of multiple carriages powered by one or more on-board diesel engines. They may also be referred to as a railcar or railmotor depending on country. Image File history File linksMetadata Szynobus_Wlkp. ... Image File history File linksMetadata Szynobus_Wlkp. ... This article describes one of the current regional administrative subdivisions of Poland. ... Coordinates: , Country Voivodeship Powiat city county Gmina PoznaÅ„ Established 8th century City Rights 1253 Government  - Mayor Ryszard Grobelny Area  - City 261. ... Image File history File linksMetadata Download high-resolution version (1280x960, 470 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Diesel-electric multiple unit Transwa Avonlink Transwa Prospector Transwa Australind User:Nachoman-au/Image Gallery Windmill Hill Cutting... Image File history File linksMetadata Download high-resolution version (1280x960, 470 KB) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Diesel-electric multiple unit Transwa Avonlink Transwa Prospector Transwa Australind User:Nachoman-au/Image Gallery Windmill Hill Cutting... The Transwa Prospector is a passenger train that runs between Perth, Western Australia, and the Goldfields town of Kalgoorlie. ... Location of Perth within Australia This article is about the metropolitan area of Perth, Western Australia. ... Kalgoorlie may refer to the following geographically related places: Kalgoorlie, Western Australia, a city and council in Western Australia; Division of Kalgoorlie, a federal division of the Australian House of Representatives located around the geographical area; Electoral district of Kalgoorlie, an electoral district of the Western Australian Legislative Assembly. ... This article is about Multiple Units vehicles. ... A diesel engine built by MAN AG in 1906 Rudolf Diesels 1893 patent on his engine design A Diesel engine is an internal combustion engine which operates using the Diesel cycle. ... A railcar (not to be confused with a railway car) is a self-propelled railway vehicle designed to transport passengers. ... Railmotor is a term which was used by several British railway companies for a steam railcar. ...

Design

The diesel engine may be located above the frame in an engine bay or under the floor. Driving controls can be provided at each end of the car, at one end only, or totally omitted, giving pure 'trailer' cars that still have motors which rely on cab cars for control.

Types

German DMU of class 628

DMUs are usually classified by the method of transmitting motive power to their wheels. Image File history File linksMetadata Download high resolution version (2560x1920, 947 KB) (de:) Baureihe 628 479-8 und 628 261-0 auf der Nibelungenbahn in Lorsch My own photo from 25-sep-2005 File links The following pages link to this file: Diesel multiple unit Metadata This file contains additional... Image File history File linksMetadata Download high resolution version (2560x1920, 947 KB) (de:) Baureihe 628 479-8 und 628 261-0 auf der Nibelungenbahn in Lorsch My own photo from 25-sep-2005 File links The following pages link to this file: Diesel multiple unit Metadata This file contains additional...

Diesel Mechanical

In a Diesel Mechanical Multiple Unit the rotating energy of the engine is transmitted via a gearbox and driveshaft directly to the wheels of the train, much like a car. The transmissions can be shifted manually by the driver, but in most applications gears are changed automatically. “Gearbox” redirects here. ...

Diesel Hydraulic

In a Diesel Hydraulic Multiple Unit, a hydraulic torque converter, a type of fluid coupling, acts as the transmission medium for the motive power of the diesel engine to turn the wheels. Some units feature a hybrid mix of hydraulic and mechanical transmissions, usually reverting the latter at higher operating speeds as this decreases engine RPM and noise. ZF torque converter A cut-away model of a torque converter A torque converter is a modified form of a hydrodynamic fluid coupling, and like the fluid coupling, is used to transfer rotating power from a prime mover, such as an internal combustion engine or electric motor, to a rotating...

Diesel Electric

In a Diesel Electric Multiple Unit (DEMU) a diesel engine drives an electrical generator which produces electrical energy. This current is then be fed to electric traction motors on the wheels or bogies in the same was as a conventional diesel electric locomotive. A diesel engine built by MAN AG in 1906 Rudolf Diesels 1893 patent on his engine design A Diesel engine is an internal combustion engine which operates using the Diesel cycle. ... This article is about machines that produce electricity. ... Electrical energy can refer to several closely related things. ... A number of vehicles use a diesel-electric powerplant for providing locomotion. ... Great Western Railway No. ...

In most modern DEMUs, each car is entirely self-contained and has its own engine, generator and electric motors. In older designs some cars within the consist may be entirely unpowered or only feature electric motors, obtaining electrical current from other cars in the consist which have a generator and engine.

Direct-drive diesel locomotives often require an impractical number of gears to keep the engine within its powerband; coupling the diesel to a generator eliminates this problem. Power still needs to be transmitted to the generator or alternator via a simple gearbox but this is advantageous because;

• Mere cables transmit the power to the axle traction motors, not a complex system of rods

• Sending power to a generator via a low powerband (i.e. diesel) is analogous to sending power to a propeller, in that one gear ratio is enough, unlike sending power to wheels, where several ratios are necessary. This is because the high friction between wheels and contact surface requires a low gear for takeoff to avoid stalling, and higher gears thereafter, since the output shaft moves relative to vehicle speed and would over-rev the engine if just one gear was available. In a generator or alternator, the force is magnetism, not a high friction surface so a high gear is fine since the magnetism is not great enough to stall the engine. The result is that the diesel-electric system puts the diesel’s low powerband to best use.

• Rheostatic braking (sometimes called dynamic, electric or regenerative braking) is also available on some DEMUs. By attaching the motors to an electrical load they act as generators and slow the train down. The load is usually resistors which dissipate electrical energy as heat to the atmosphere, though it is sometimes used to heat the interiors. In some cases it is stored for later use or passed back into external power supplies. The advantage for this method of braking is reduced wear and tear on the main service brakes.

German DMU of class 628

Two SŽ class 711 DMUs connected

Image File history File linksMetadata Download high resolution version (2560x1920, 947 KB) (de:) Baureihe 628 479-8 und 628 261-0 auf der Nibelungenbahn in Lorsch My own photo from 25-sep-2005 File links The following pages link to this file: Diesel multiple unit Metadata This file contains additional... Image File history File linksMetadata Download high resolution version (2560x1920, 947 KB) (de:) Baureihe 628 479-8 und 628 261-0 auf der Nibelungenbahn in Lorsch My own photo from 25-sep-2005 File links The following pages link to this file: Diesel multiple unit Metadata This file contains additional... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (2592 × 1944 pixel, file size: 886 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (2592 × 1944 pixel, file size: 886 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... SŽ class 711 is a diesel multiple unit, produced by MBB Donauwörth in 1970 and currently operating in the Slovenian Railways. ...

Benefits

A train composed of DMU cars scales well as it allows extra passenger capacity to be added at the same time as motive power. It also permits passenger capacity to be matched to demand, and for trains to be split and joined en-route.

Distribution of the propulsion among the cars also results in a system that is less vulnerable to single-point-of-failure outages. Many classes of DMU are capable of operating with faulty units still in the consist. Because of the self contained nature of diesel engines, there is no need to run overhead electric lines or electrified track, which can result in lower system construction costs. Overhead wire in Coventry, England A railway electrification system is a way of supplying electric power to electric locomotives or multiple units. ... Third rail at the West Falls Church Metro stop in Washington, D.C., electrified to 750 volts. ...

Around the World

North America

Budd Rail Diesel Car RDC-1 #407 of the Cape May Seashore Lines

South Florida Regional Transportation Authority Tri-Rail Bi-Level DMU.

Two Bombardier Talent low-floor DMUs on the O-Train prototype line in Ottawa Canada

One of the first Diesel Multiple Units in North America was the Budd Rail Diesel Car (RDC). The RDC was a single passenger car with two diesel engines and two sets of controls. Any number of cars could be connected together and all the propulsion systems controlled from a single operator's station or cab. Introduced in the early 1940s, the cars were used on rural railway lines that did not warrant full passenger trains, or short commuter services. Image File history File links Budd_RDC.png Budd RDC-1 Cape May Seashore Lines #407. ... Image File history File links Budd_RDC.png Budd RDC-1 Cape May Seashore Lines #407. ... The Budd Company (now ThyssenKrupp Budd) is a metal fabricator and major supplier of body components to the automobile industry. ... Budd RDC-1 #407 of the Cape May Seashore Lines. ... Cape May Seashore Lines is a short line railroad in southern New Jersey. ... Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Tri-Rail is a commuter rail line linking Miami, Fort Lauderdale, and West Palm Beach, Florida. ... Northbound Tri-Rail arriving at Delray Beach Station Tri-Rail is a Regional rail line linking Miami, Fort Lauderdale, and West Palm Beach, Florida. ... O-train File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... O-train File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Bombardier Transportation is the rail equipment division of the Bombardier group. ... Three Talents are used by the O-Train public transport pilot project in Ottawa. ... The O-Train at Carleton University. ... This article is about the capital city of Canada. ... The Budd Company (now ThyssenKrupp Budd) is a metal fabricator and major supplier of body components to the automobile industry. ... Budd RDC-1 #407 of the Cape May Seashore Lines. ...

In the United States of America only heavyweight DMU systems are permitted on freight rail corridors. This is due to the Federal Railway Administration setting higher buff strength requirements than European regulators, effectively prohibited the use of lightweight European-style light-rail DMUs on main line railways. The Federal Railroad Administration (FRA) was created in 1966 as a division of the U.S. Department of Transportation to promote rail transportation and safety. ... A Citadis tram of the Luas system in Dublin, Ireland Changchun LRT, China Shanghai Metro transit station, China A METRORail train approaching Preston Station in downtown Houston, Texas, USA. A LYNX light rail train from Charlotte, North Carolina, USA. The Guadalajara urban L-train system (SITEUR), at first a trolleybus...

Several rail operators in the United States use DMUs suitable for mainline use:

• The South Florida Regional Transportation Authority has used a Colorado Railcar bi-Level DMU and Coach consist since October 2006 as a technology demonstrator on the 87-mile long Tri-Rail commuter rail line between Miami and West Palm Beach, Florida. In early 2007, three more bi-level DMUs and an additional bi-level non-powered coach were acquired.

• The Florida Department of Transportation is currently conducting preliminary engineering for a DMU commuter line connecting Orlando, Florida with neighboring communities north and south of its downtown, with service targeted to begin in 2009.[1]

• The Los Angeles County Metropolitan Transportation Authority approved an allocation of $250,000 for a feasibility study of DMUs for "future transportation options for the region" on July 5, 2006 (Ara Najarian, Metro Board Member).

• Chicago's commuter rail line, Metra, is studying the use of DMUs on its newly proposed lines (STAR line, SES). They claim these DMUs will have better acceleration, be more fuel efficient, and seat more customers than the current diesel engine cab and double decker rail cars that are currently in use. [2]

• Amtrak is reportedly encouraging the state of Vermont to buy DMUs for Amtrak's state-subsidized Vermonter service, in order to save money over the current locomotive-pulled arrangement. [3]

• Boston's Massachusetts Bay Transportation Authority is reportedly considering options to utilize DMUs on the Fairmount Line, currently run by locomotive-pulled carriages, in order to improve service and headways on the line. This plan has become known as the Indigo Line.

Canada generally follows similar buff strength requirements to the USA, but new services are evaluated on a case-by-case basis. As a result several types of lightweight DMUs have been used: Tri-Rail is a commuter rail line linking Miami, Fort Lauderdale, and West Palm Beach, Florida. ... Colorado Railcar is a manufacturer of railroad rolling stock. ... Northbound Tri-Rail arriving at Delray Beach Station Tri-Rail is a Regional rail line linking Miami, Fort Lauderdale, and West Palm Beach, Florida. ... This article is about the city in Florida. ... West Palm Beach is a city located in Palm Beach County, Florida. ... Official language(s) English Capital Tallahassee Largest city Jacksonville Largest metro area Miami metropolitan area Area  Ranked 22nd  - Total 65,795[1] sq mi (170,304[1] km²)  - Width 361 miles (582 km)  - Length 447 miles (721 km)  - % water 17. ... Official language(s) English Capital Tallahassee Largest city Jacksonville Largest metro area Miami metropolitan area Area  Ranked 22nd  - Total 65,795[1] sq mi (170,304[1] km²)  - Width 361 miles (582 km)  - Length 447 miles (721 km)  - % water 17. ... The Florida Department of Transportation, or FDOT, is a decentralized agency charged with the establishment, maintenance, and regulation of public transportation in the state of Florida[1]. // Achievements In 1974, FDOT completed Floridas Turnpike, a 450-mile system of limited access toll highways. ... Nickname: Location in Orange County and the state of Florida Coordinates: , Country State Counties Orange Government  - Mayor Buddy Dyer (D) Area  - City 101 sq mi (261. ... Flag Seal Nickname: City of Angels Location Location within Los Angeles County in the state of California Coordinates , Government State County California Los Angeles County Mayor Antonio Villaraigosa (D) Geographical characteristics Area     City 1,290. ... This article is about the present transit agency. ... is the 186th day of the year (187th in leap years) in the Gregorian calendar. ... Year 2006 (MMVI) was a common year starting on Sunday of the Gregorian calendar. ... Nickname: Motto: Urbs in Horto (Latin: City in a Garden), I Will Location in the Chicago metro area and Illinois Coordinates: , Country State Counties Cook, DuPage Settled 1770s Incorporated March 4, 1837 Government  - Mayor Richard M. Daley (D) Area  - City  234. ... A Metra Train Metra (Officially known as the Northeast Illinois Regional Commuter Railroad Corporation) is a regional rail that serves the city of Chicago, Illinois, and surrounding cities, many of them Chicago suburbs. ... The high-speed Acela Express in West Windsor, New Jersey. ... This article is about the U.S. state. ... Amtraks Vermonter is a 606-mile (975 km) passenger train service between St. ... Nickname: City on the Hill, Beantown, The Hub (of the Universe)1, Athens of America, The Cradle of Revolution, Puritan City, Americas Walking City Location in Massachusetts, USA Counties Suffolk County Mayor Thomas M. Menino(D) Area    - City 232. ... The Massachusetts Bay Transportation Authority (MBTA) is a body politic and corporate, and a political subdivision of the Commonwealth of Massachusetts [2] formed in 1964 to finance and operate most bus, subway, commuter rail and ferry systems in the greater Boston, Massachusetts area. ... The Fairmount Line or Dorchester Branch is a line of the MBTA Commuter Rail system in Boston, Massachusetts, USA. Except for a short portion in Milton, it lies entirely within Boston, passing through the neighborhoods of Dorchester and Hyde Park. ...

• The O-Train in Ottawa, Ontario uses European-standard Bombardier Transportation Talent DMUs on conventional railway tracks under a specific safety agreement with Transport Canada.
• Calgary, Alberta has also used European Sprinter DMUs in demonstration service on conventional railway tracks.

The O-Train at Carleton University. ... This article is about the capital city of Canada. ... Bombardier Transportation is the rail equipment division of the Bombardier group. ... Three Talents are used by the O-Train public transport pilot project in Ottawa. ... Transport Canada is the department within the government of Canada which is responsible for developing regulations, policies and services of transportation in Canada. ... Calgary is a city in the province of Alberta, Canada. ... The Sprinter is a microcomputer made by Peters Plus, Ltd. ...

Australia

TransAdelaide's 3100-class diesel-electric railcars operating in Adelaide, South Australia

See also: Rail transport in Australia

DMUs were first introduced to Australia in the early 20th century for use on quiet branchlines that could not justify a locomotive hauled service. Today a range of modern DMUs are extensively used across Australia for both commuter and intercity routes: Image File history File links AdelaideRail_2. ... Image File history File links AdelaideRail_2. ... TransAdelaide is a public transport company which previously operated the majority of the suburban bus network in Adelaide, Australia and currently operates the suburban train and tram network. ... For other uses, see Adelaide (disambiguation). ... Capital Adelaide Government Constitutional monarchy Governor Marjorie Jackson-Nelson Premier Mike Rann (ALP) Federal representation  - House seats 11  - Senate seats 12 Gross State Product (2004-05)  - Product ($m)  $59,819 (5th)  - Product per capita  $38,838/person (7th) Population (End of September 2006)  - Population  1,558,200 (5th)  - Density  1. ... Rail transport in Australia is large, comprising a total of 33,819 km (2,540 km electrified) of track. ...

• Western Australia's Transwa operates the Prospector, Avonlink and Australind on medium and long country services.
• In Victoria V/Line operate Sprinter and VLocity DMUs on both commuter and medium distance country services.
• In New South Wales CountryLink uses Xplorek,hkhkhbk;br DMUs on country services, and CityRail operate the 620 / 720 class, Endeavour, and Hunter railcars on commuter services.
• A DMU variant of Queensland Rail's QR Tilt Train is in use on the long distance Brisbane to Cairns service.
• TransAdelaide in South Australia use 3000 class and 2000 class DMUs on their suburban rail lines.

Categories: Public transport | Western Australia | Substubs ... The Transwa Prospector is a passenger train that runs between Perth, Western Australia, and the Goldfields town of Kalgoorlie. ... The Avonlink railcar departs Northam Station for Merredin. ... Australind in Transwa livery at the Bunbury Passenger Terminal. ... V/Line is a regional passenger train and coach service in Victoria, Australia. ... The VLocity 160 (normally just VLocity) is a high speed diesel multiple unit train manufactured by Bombardier Transportation (contract inherited from Adtranz) for use on regional rail lines in Victoria, running under V/Line. ... CountryLink is the name given to the train and coach services that runs throughout regional areas in the state of New South Wales (NSW), Australia. ... The Xplorer is a self-propelled diesel railmotor train used on country passenger rail services in New South Wales, Australia. ... This article is on the commuter rail network centred on Sydney, Australia. ... 620 & 720 class railcars are a diesel railcar type used by CityRail, primarily on its Hunter Valley network. ... This does not cite any references or sources. ... Hunter railcars are new type of diesel multiple unit being tried for use by CityRail on the Hunter Valley lines centred on Newcastle. ... Wickham Terrace entrance to Central Station - showing Queensland Rail QR sign QR, previously known as Queensland Rail and Queensland Railways, is the corporation responsible for the operation and maintenance of the railway system in the State of Queensland, Australia. ... The Cairns (Diesel) Tilt Train The Rockhampton (Electric) Tilt Train The Tilt Train is a Queensland Rail train running the coast of Queensland, from Brisbane to Rockhampton and Cairns. ... For other uses, see Brisbane (disambiguation). ... Cairns redirects here. ... TransAdelaide is a public transport company which previously operated the majority of the suburban bus network in Adelaide, Australia and currently operates the suburban train and tram network. ... TransAdelaide’s 3000 & 3100-class diesel-electric railcars are the backbone of the suburban network 3100-class railcars 3131 & 3132 in the Adelaide Hills on a Belair Line service. ... The 2000 class railcars (aka Jumbos) are self-propelled diesel railcars which are used by TransAdelaide on the Adelaide metropolitan rail network. ...

Germany

German ICE-TD DMU near Rostock

The Flying Hamburger of Germany, introduced 1933, established the then-time fastest regular railway connection of the world. Top speed was 160 km/h, the average speed being 124 km/h on the tracks between Berlin and Hamburg. Image File history File links Download high-resolution version (1024x768, 195 KB) // [edit] Summary [edit] Deutsch Autor: Armin Emde de:Benutzer BR_146 (chep87. ... Image File history File links Download high-resolution version (1024x768, 195 KB) // [edit] Summary [edit] Deutsch Autor: Armin Emde de:Benutzer BR_146 (chep87. ... ICE 3 trainset near Ingolstadt The InterCityExpress or ICE (German pronunciation: ) is a system of high-speed trains predominantly running in Germany and its neighbouring countries. ... The DRG Class SVT 877 Flying Hamburger - or in German Fliegender Hamburger - was Germanys first fast diesel trainset; and it is credited with establishing the then-time fastest regular railway connection worldwide. ... Year 1933 (MCMXXXIII) was a common year starting on Sunday (link will display full calendar) of the Gregorian calendar. ... This article is about the capital of Germany. ... This article is about the city in Germany. ...

The Trans Europ Express travelled international traffic between countries like Germany, France, Italy, Netherlands in the 1950s and 1960s. They were diesel multiple units since the electrical systems varied a lot. The Trans Europ Express is a former international train network in Europe. ...

Also from Germany is the CargoSprinter concept. With two motorized units and three flatbed wagons between them, this DMU container train tried to compete with container road trucks by profiting from existing railway access to factories and businesses, but eliminating the need for inflexible locomotive-pulled cargo trains. The payload was 160 tons. Suffering from technical problems and failing political support for short-haul cargo railway connections, the prototypes were sold to Austria. The CargoSprinter is a sort of multiple unit freight car; it could also be thought of as a container truck that runs on rails. ... Look up container in Wiktionary, the free dictionary. ...

Currently DMUs are used in large numbers for local traffic (e.g. DB Class 642) and fast, tilting regional traffic (e.g. DB Class 612). The introduction of DB Class 605 as a tilting InterCityExpress train in 2001 was not successful. Desiro DMU, as part of an InterCity Săgeata Albastră (Blue Arrow) train in Romania, run by Căile Ferate Române A Bulgarian State Railways-operated Desiro train at the Central Railway Station in Sofia Desiro is a brand name of modular trains manufactured by Siemens of Germany. ... The X 2000 trainset on a US tour stopped at Union Station, Chicago, Illinois, in 1993. ... The RegioSwinger is a tilting Diesel Multiple Unit (DMU) passenger train used for fast regional traffic on lines not electrified. ... ICE train The InterCity Express or ICE is a type of high-speed train operated mostly by DB Fernverkehr in Germany and neighboring countries, for example to Zürich, Switzerland or Vienna, Austria. ... ICE 3 trainset near Ingolstadt The InterCityExpress or ICE (German pronunciation: ) is a system of high-speed trains predominantly running in Germany and its neighbouring countries. ...

United Kingdom

A preserved Class 101, once the most popular DMU on British railways

Further information: List of British Rail diesel multiple unit classes

The first significant use of DMUs in the United Kingdom was by the Great Western Railway, which introduced the small but successful series of diesel-mechanical GWR railcars in 1934. The London, Midland and Scottish Railway also experimented with DMUs in the 1930s, both on its own system (the LMS railcars), and on its Northern Irish subsidiary (the LMS (Northern Counties Committee) railcars), but development was curtailed by World War II. Image File history File linksMetadata Download high resolution version (2048x1536, 650 KB) This page is a candidate to be moved to the Wikimedia Commons. ... Image File history File linksMetadata Download high resolution version (2048x1536, 650 KB) This page is a candidate to be moved to the Wikimedia Commons. ... Class 101, no. ... This page lists every diesel-powered multiple unit allocated a TOPS classification or used on the mainline network since 1948 (i. ... The original Bristol Temple Meads station, first terminus of the GWR, is the building to the left of this picture The Great Western Railway (GWR) was a British railway company, linking South West England, the West Country and South Wales with London. ... In 1933, the Great Western Railway introduced the first of what was to become a very successful series of railcars, which survived in regular use into the 1960s, when they were replaced with the new British Rail First Generation type Diesel multiple units. ... The London, Midland and Scottish Railway (LMS1) was a British railway company. ... The London, Midland and Scottish Railway purchased three four-wheel diesel railcars from Leyland in 1933. ... The Northern Counties Committee (NCC) was a railway that served the north-east of Ireland. ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000...

After nationalisation, British Railways revived the concept in the early 1950s. At that time there was an urgent need to move away from expensive steam traction which led to many experimental designs using diesel propulsion and multiple units. Following the BR's 1955 Modernisation Plan, the building of a large fleet of DMUs was authorised. The BR 'First Generation' DMUs were built between 1956 and 1963, and some remained in service until 2003. Most were diesel-mechanical, but a few designs had diesel-hydraulic transmission (these were generally less successful and were withdrawn earlier than the main diesel-mechanical types). British Railways (BR), later rebranded as British Rail, ran the British railway system, from the nationalisation of the Big Four British railway companies in 1948 until its privatisation in stages between 1994 and 1997. ... This article is about Multiple Units vehicles. ...

BR's owners, the British Government, required that contracts for the design and manufacture of new locomotives and rolling stock be split between numerous private firms as well as BR's own workshops, while different BR Regions laid down different specifications. The result was a large number of different types, some of which were built only in small numbers, but in general the First Generation units fell into five distinct groups:

• 'Low Density' units (such as Class 101), designed for use on rural lines and provincial commuter services. These had 3+2 seating in 2nd class, and had doors located in vestibules separated from the seats. They were initially allocated to all BR regions except the Western and Southern Regions;
• 'High Density' units (such as Class 121), designed for the busy commuter services into London, and also for local services in Birmingham, Liverpool and throughout the BR Western Region. These were built with doors at each seating bay, and bench seats across the full width of the carriage for maximum seating capacity. Many were later rebuilt with 3+2 seating and gangways between carriages;
• 'Cross Country' units, which were essentially more luxurious Low Density units, with 2+2 seating in 2nd class. They were designed for longer distance rural services, and were originally allocated to the Western and Scottish Regions;
• 'Intercity' units, which were more substantially constructed, and shared many features with contemporary hauled coaching stock. They built for express services on important secondary routes on the Scottish, North Eastern and Western Regions.
• Parcels cars. Those built as such were invariable single-units, and were built for the Western and London Midland Regions. Later some passenger DMUs were also rebuilt as parcels units.

There were also a small number of 4-wheeled railbuses built for the most lightly-used branch lines, but these failed to prevent the closure of such lines, and all of the railbuses had gone by the end of the '60s. Class 101, no. ... W55033 at the Colne Valley Railway in original green livery ( Alternative picture) The British Rail Class 121 diesel multiple units were built by Pressed Steel in 1960. ...

Diesel Electric Multiple Units (DEMUs) were also developed during the 1950s and '60s, for use on the Southern Region. The Southern was largely electrified, but required diesel units for the remaining lines, in some cases as stop-gaps pending planned electrification. Diesel-mechanical and diesel-hydraulic units were judged to have inadequate acceleration, which would cause delays to the more numerous electric trains. Examples included classes 205 and 207, which were nick-named "Thumpers" because of their characteristic sound. Class 205, no. ... Class 207 DEMU (with former Class 411 centre coach in place of the original) preserved at the East Lancashire Railway, Bury. ...

Also in the 1950s, British Railways introduced its Blue Pullman high speed DEMUs. These were few in number and relatively short-lived, but they paved the way for the very successful British Rail "InterCity 125", which were built between 1975 and 1984 and took over most principal express services on non-electrified routes. These 125mph trains run with a streamlined power car at each end and (typically) 7 or 8 intermediate trailer cars. Although originally classified as DEMUs, the trailer cars are very similar to loco-hauled stock, and the power cars were later reclassified as locomotives under Class 43. They remain in widespread use. The Blue Pullman is the name of a luxury train, the name of a former fleet of luxury trains, and the title of a film about the latter fleet of trains. ... A High Speed Train power car in Intercity livery InterCity was the sector of British Rail responsible for long-distance express trains. ... For the other locomotive given TOPS Class 43, see British Rail Class 43 (Warship Class). ...

The popular Class 170, the best selling DMU of the last 10 years in the UK.

By the early 1980s, many of the surviving First Generation units were becoming life-expired, which lead to spiralling maintenance costs, poor reliability and a poor public image for the railway. A stopgap solution was to convert some services back to locomotive haulage, as spare locomotives and hauled coaching stock were available, but this also increased operating costs. Commencing in the mid '80s, British Rail embarked upon its so called "Sprinterisation" programme and the older first generation DMUs were replaced by three standardised families: Download high resolution version (2048x1536, 645 KB)BR Class 170, no. ... Download high resolution version (2048x1536, 645 KB)BR Class 170, no. ... The Class 170 Turbostar is a diesel multiple unit (DMU) built by Bombardier Transportation (previously ADtranz) at their Derby Litchurch Lane Works, England. ...

• Pacer railbus, ultra-low-cost diesel-mechanical units utilising 4-wheeled chassis and lightweight bus bodywork, designed for provincial branch line and stopping services;
• Sprinter a family of diesel-hydraulic DMUs based on the Mark 3 carriage bodyshell. These fall into three sub-groups; Sprinters (for branch line/commuter service), Super Sprinters (for longer cross country services), and Express units (for secondary express services);
• Networker Turbo diesel-hydraulic units, of class 165 (standard commuter version) and class 166 (for longer distance commuter services). These took over the remaining non-electric commuter services into London.

Following the privatisation of British Rail in the late 90s, several other diesel-hydraulic DMU families have been introduced: A Mancunian class 142 Pacer ( Alternative picture) A Westcountry based Class 143 A Yorkshire based Class 144 Pacer is the operational name of the British class 140, 141, 142, 143 and 144 railbuses, built between 1984 and 1987. ... Not to be confused with Railroad car A railcar is a self-propelled rail vehicle designed to transport passengers. ... The Sprinter is a family of diesel multiple unit trains in use on the UK railway system. ... Mark 3 DVT at Norwich station British Rails third design of carriages was designated Mark 3. ... Class 165/1, no. ... Class 166, no. ... The privatisation of British Rail was the result of the Railways Act 1993 introduced by John Majors Conservative government. ...

• Turbo, 168 Clubman and 170/171 Turbostar units, a development of the earlier Network Turbos. These are built by Bombardier Transportataion and are the most numerous of the post-privatisation designs. The same basic design has been adapted for a variety of different types of use, ranging from commuter to secondary express services;
• Coradia, class 175 were designed by Alstom as a rival to the 170 Turbostar, but bought only by First North Western;
• Adelante, class 180 were an Alstom design for express services built only for First Great Western;
• Desiro (DMU), a Siemens design introduced to the UK in 2007 as Class 185 for First TransPennine Express services.

As these modern diesel-hydraulic units have sufficient performance to match the acceleration of Electric Multiple Units, DEMUs are no longer used on the former Southern Region diesel services. However, almost all non-electric InterCity type services are operated by Diesel Electric Multiple Units, and their numbers have been swelled by the introduction of the high speed Class 220 Voyager, 221 Super-Voyager and 222 Meridian/Pioneer units. Air foil bearing-supported turbocharger cutaway made by Mohawk Innovative Technology Inc. ... A Chiltern Railways Clubman at Kidderminster station. ... The Class 170 Turbostar is a diesel multiple unit (DMU) built by Bombardier Transportation (previously ADtranz) at their Derby Litchurch Lane Works, England. ... Class 170/2, no. ... The Class 175 ‘Coradia’ is a model of diesel multiple unit passenger train used in the United Kingdom. ... Alstom (formerly GEC-Alsthom) (Euronext: ALO) is a large French company whose businesses are power generation, railway signalling; and manufacturing trains (e. ... First North Western was a train operating company in the United Kingdom serving North West England. ... Class 180, at Radley, shows off its roof. ... First Great Western is the operating name of First Greater Western Ltd,[1] a British train operating company owned by FirstGroup, which operates services in the west and south west of England and South Wales. ... Siemens has the following uses: Siemens is a German family name carried by generations of the telecommunications industrialists, including Werner von Siemens, Sir William Siemens, Wilhelm von Siemens and Peter von Siemens Siemens AG is a German electrical and telecommunications company, founded as a telegraph equipment manufacturer by Werner von... 185102 is seen here departing Leeds City station during testing trials on 15 January 2006, and shows the livery in which the trains were delivered. ... First TransPennine Express (FTPE) is a train operating company in the United Kingdom. ... A Class 220 Voyager at Bristol. ... Virgin Trains Class 221 Super Voyager 221137 Mayflower Pilgrims at Camborne Station, Cornwall operating route VT1651, preparing to depart for Penzance. ... The British Rail Class 222 is a diesel-electric multiple unit high-speed train. ...

Ireland

DMU 2751 in Colbert Station, 2006

Main article: Multiple Units of Ireland

In the Republic of Ireland the Córas Iompair Éireann (CIE), which controlled the republic's railways between 1945-86, introduced DMUs in the mid-1950s and they were the first diesel trains on many main lines. The Great Northern Railway, merged into CIE at this time, also brought some DMUs of its own of a similar style. They were not well suited to the long-distance tasks and were replaced in a few years by traditional trains with new diesel locomotives, being then mostly restricted to Dublin commuter lines. The power systems were worn out by the 1970s so they were converted to normal carriages pulled by diesel locomotives on these suburban routes, and DMUs disappeared from CIE. But since 1987, Iarnród Éireann (IE) have been increasing the use of this type of train, in order to replace older locomotives and carriages, using new types of train manufactured in a number of overseas countries. Image File history File linksMetadata Download high-resolution version (2048x1536, 718 KB) Iarnrod Eireann DMU 2751 photographed at Colbert Station, Limerick by the author (Dawgz), Feb 2006 I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the... Image File history File linksMetadata Download high-resolution version (2048x1536, 718 KB) Iarnrod Eireann DMU 2751 photographed at Colbert Station, Limerick by the author (Dawgz), Feb 2006 I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the... Limerick Railway Station also called Colbert Station serves the city of Limerick in County Limerick. ... A wide variety of diesel and electric multiple units have been used on Irelands railways. ... Córas Iompair Éireann[1] (CIÉ) is a statutory authority which is owned by the Irish Government. ... Current Iarnród Eireann (Irish Rail) intercity rail network An IÉ commuter train at Tara Street Station, Dublin, 2006 IÉ no. ...

In Northern Ireland the Northern Ireland Railways used DMUs extensively from the 1950s throughout its system, notably the NIR 80 Class introduced in the early 1970s and currently being replaced (as of 2007). Northern Ireland (Irish: ) is a part of the United Kingdom lying in the northeast of the island of Ireland, covering 5,459 square miles (14,139 km², about a sixth of the islands total area). ... 1906 reference Rail Map Northern Ireland Railways (NIR or NI Railways) – formerly, and very briefly, known as Ulster Transport Railways (UTR) – is the railway operator in Northern Ireland. ... By the early 1970’s the MED’s together with the units inherited from the GNR had been in service for 20 years, the MPD’s for 10 years. ...

South Korea

Korail DHC-PP with new CI colour

Korail operates many DMUs. The DHC (Diesel Hydraulic Car), which made its debut for the 1988 Seoul Olympics, can reach speeds up to 150 km/h and serves Saemaul-ho trains. The NDC (New Diesel Car) serves Mugunghwa-ho trains and the CDC (Commute Diesel Car) serves Tonggeun trains. The NDC and CDC can reach speeds up to 100 km/h and are not used for mountainous lines such as the Taebaek Line. Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (1600 × 1200 pixel, file size: 1. ... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (1600 × 1200 pixel, file size: 1. ... The Korea Railroad Corportation, now known as Korail, is the national railroad operator in South Korea. ... The Saemaul-ho or Saemaul is a class of train operated by Korail, the national railroad of South Korea. ... The Mugunghwa-ho or Mugunghwa is a class of train operated by Korail, the national railroad of South Korea. ... The Tonggeun (previously called Tongil-ho) is a class of short-run commuter trains operated by Korail, the national railroad of South Korea. ...

Japan

JR West Kiha 120 DMU on Kansai Main Line.

The development of DMUs in Japan started in 1950s following the improvement of fuel supply that was critical during World War II. In 1953, the Japanese National Railways put the hydraulic torque converter into practical use. This invention facilitated the development of DMUs, which spread all over the nation as not only on local services but also on long distance express services. In 1960, the 9-car KiHa 80 series DMUs debuted on Hatsukari limited express service connecting Tokyo and Aomori (about 750 km). Image File history File links Metadata Size of this preview: 399 × 599 pixelsFull resolution (679 × 1020 pixel, file size: 722 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Metadata Size of this preview: 399 × 599 pixelsFull resolution (679 × 1020 pixel, file size: 722 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000... Japanese National Railways (日本国有鉄道 Nippon Kokuyū Tetsudō), abbreviated Kokutetsu (国鉄) or JNR, was the national railway network of Japan from 1872 to 1987. ... Ueno Station was the destination of thousands of laborers from the Tohoku region who came to Tokyo seeking employment. ... Aomori Station, located in Aomori, Aomori, Japan. ...

Presently, all the passenger railway companies of Japan Railways Group (JR Group) operate DMUs on semi-trunk and local lines while almost all of trunk lines have been electrified. On the JR lines not yet electrified, locomotive trains were abandoned but only small number of sleeper trains. There are also a number of independent railway lines that operate DMUs. Map showing the approximate areas covered by each company in the JR Group. ...

Gallery

Wessex Trains Class 143 Pacer DMU 143603 at platform 3 of Bristol Temple Meads station with a service to Avonmouth. Image File history File linksMetadata Download high resolution version (1280x960, 573 KB) Wessex Trains Class 143 DMU 143603 at platform 3 of Bristol Temple Meads station with a service to Avonmouth. ... A Wessex Class 153 A Class 150/2 unit in West Country advertising livery. ... 143603 at Bristol Temple Meads, 28 June 2005. ... The original station (left) closed in 1965. ... Categories: Stub | Bristol | Ports and harbours of the UK ...	A four-car Midland Mainline Class 222 passing through Loughborough on 19 November 2005, one of the latest DEMUs to see service in the UK. Image File history File links Download high resolution version (1294x788, 201 KB) Summary © Alan Harris unidentified class 222 passing through Loughborough, 19 November 2005. ... Midland Mainline (MML) is a British train operating company owned by the National Express Group, created after the privatisation of British Rail. ... Loughboroughs carillon Loughborough parish church The Brush engineering works Loughborough University Loughborough (pronounced locally as either , LUFF-burra or , LUFF-bruh, and more widely as [ˈlʌfˌb(ə)ɹə]) is a town in Leicestershire, central England with a population of 57,600 as of 2004. ... is the 323rd day of the year (324th in leap years) in the Gregorian calendar. ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ...	A Virgin Trains Class 221, their replacement for the HST and used on cross-country services. Image File history File linksMetadata Size of this preview: 800 × 600 pixelsFull resolution (1600 × 1200 pixel, file size: 908 KB, MIME type: image/jpeg) An unidentified Class 221 Virgin Voyager cross country service crossing the King Edward VII Bridge in Newcastle. ... Virgin Trains is a train operating company in the United Kingdom. ... Virgin Trains Class 221 Super Voyager 221137 Mayflower Pilgrims at Camborne Station, Cornwall operating route VT1651, preparing to depart for Penzance. ...	Japanese DMU "KIHA40" Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (2816 × 2112 pixel, file size: 2. ...
Dutch DMU "DM '90" or "Buffel" Image File history File links No higher resolution available. ... The Buffel was the primary mine-protected APC of the South African Army during the Angolan conflict. ...	Dutch DMU "LINT". Image File history File links No higher resolution available. ...	Interior of a LINT train. Image File history File links No higher resolution available. ...	A former Soviet, now Lithuanian DMU in a Vilnius depot. Image File history File links Metadata Size of this preview: 800 × 545 pixelsFull resolution (2325 × 1584 pixel, file size: 734 KB, MIME type: image/jpeg) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Soviet redirects here. ...
German DMU "Talent" Image File history File links No higher resolution available. ... Look up talent in Wiktionary, the free dictionary. ...	Interior of a Talent Image File history File links No higher resolution available. ...	The interior of an Canadian O-Train’s carriage.when I was young Image File history File links The interior of a Talent diesel multiple unit used by the Ottawa O-Train pilot project. ... The O-Train at Carleton University. ...	The cab of a German DMU of Class 628.4 origin. Image File history File links Metadata No higher resolution available. ...

Manufacturers

DMU manufacturers include:

• Bombardier Transportation of Montreal, Canada
• Colorado Railcar
• Niigata Transys of tokyo, Japan
• Rotem of Seoul, South Korea
• Siemens Desiro DMU
• Integral Coach Factory of Chennai, India
• TÜVASAŞ of Adapazari, Turkey
• BREL, UK (former, now closed).

Bombardier Transportation is the rail equipment division of the Bombardier group. ... Nickname: Motto: Concordia Salus (well-being through harmony) Coordinates: , Country Province Region Montréal Founded 1642 Established 1832 Government  - Mayor Gérald Tremblay Area [1][2][3]  - City 365. ... For other uses, see Tokyo (disambiguation). ... Rotem is a South Korean company manufacturing rolling stock, defense products and plant equipment. ... Short name Statistics Location map Map of location of Seoul. ... Siemens redirects here. ... Desiro DMU, as part of an InterCity Săgeata Albastră (Blue Arrow) train in Romania, run by Căile Ferate Române A Bulgarian State Railways-operated Desiro train at the Central Railway Station in Sofia Desiro is a brand name of modular trains manufactured by Siemens of Germany. ... Started in 1952 the Integral Coach Factory (ICF) is located Avadi a suburb near Chennai, India. ... , “Madras” redirects here. ... TÃœVASAÅž () is a Turkish industry company manufacturing, refurbishing and repairing passenger rolling-stock. ... Adapazari is the capital of the Turkish province of Sakarya. ... for the singer see Jacques Brel BREL stands for British Rail Engineering Limited, which was the engineering division of British Rail Categories: Stub | British Rail(ways) ...

See also

• Electric Multiple Unit
• Diesel locomotive
• Multiple unit
• Railways
• Multiple Units of Ireland