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Topic: Diesel multiple unit

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	Multiple unit
		A multiple unit is a type of train where the traction is supplied by driving bogies under one or more carriages of the (usually very short) train.
		Most multiple units are powered either by a diesel engine driving the wheels through a gearbox (a diesel multiple unit, or DMU), or by electric motors, receiving their power through a live rail or overhead wire (an electric multiple unit or EMU).
		In North America, multiple units are not common (and diesel multiple units almost non existent).
	www.ebroadcast.com.au /lookup/encyclopedia/mu/Multiple_unit.html (226 words)

	Transporteon.com -- Diesel locomotive
		Diesel locomotives vary in the form of transmission used to convey the power from a diesel engine (or engines) to the wheels.
		Diesel trains or locomotives that use this are called diesel-mechanical and began to appear (although limited in power) even before the first world war which saw a number of simplex diesel systems built for the war, a small number of which survive and are still operational today.
		A complete HST set was originally designated as a Class 253 or 254 diesel multiple unit (DMU), but due to the frequent exchanges between sets the power cars were reclassified as locomotives and given class number 43.
	www.transporteon.com /diesel.html (994 words)

	PowerPedia:Diesel engine - PESWiki (Site not responding. Last check: 2007-10-09)
		Diesel two-strokes are ideal for such applications because of their high power density--with twice as many power strokes per crankshaft revolution compared to a four-stroke, they are capable of producing much more power per displacement.
		Diesel or diesel fuel is a specific fractional distillate of fuel oil (mostly petroleum) that is used as fuel in a diesel engine invented by German engineer Rudolf Diesel.
		Diesel is generally simpler to refine than gasoline and often costs less (although price fluctuations sometimes mean that the inverse is true; for example, the cost of diesel traditionally rises during colder months as demand for heating oil, which is refined much the same way, rises).
	peswiki.com /index.php/PowerPedia:Diesel_engine (10867 words)

	Diesel multiple unit - Wikipedia, the free encyclopedia
		DMU classification is subdivided into the form of the transmission: Diesel Mechanical Multiple Unit has a mechanical transmission; Diesel Hydraulic Multiple Unit has a hydraulic transmission; Diesel Electrical Multiple Unit has an electrical transmission.
		More rugged than units strictly designed for operation on light rail, DMU systems can be safely operated within freight rail corridors, though safety regulations necessitated by the use of heavier trains in North America generally prevent this, requiring that they be operated on separate tracks in North America.
		DMUs see widespread use in the United Kingdom, the Sprinter family of trains (not related to the similarly named German or Dutch units) dominated the network for many years, along with DMUs from the Pacer family.
	en.wikipedia.org /wiki/Diesel_multiple_unit (826 words)

	Diesel Multiple Units (Site not responding. Last check: 2007-10-09)
		The Diesel Multiple Unit or DMU served a different need from the 'suburban' EMUs, they were seen as a viable low cost alternative to a loco and coach for branch line working or as a high speed inter-city unit.
		Electric multiple units were already in widespread use throughout the country in the more built up areas, some of these services dated back to the 1890s although most of the existing stock dated from the 1930s.
		These diesel units proved successful and many of the units built at this time remained in service into the 1990s, a few made it into the new Millennium (I understand that some had their engines removed for use in the 'second generation' Class 142 rail-bus units of the 1980s).
	myweb.tiscali.co.uk /gansg/00-app3-4/ap3-dmu.htm (8808 words)

	What's happened to the diesel railcar revival? - Railway Age, July 2000
		But hardly had the diesel railcar been declared dead when it came back to life in a flurry of proposals for new passenger rail starts with DMU equipment, together with supplier proposals for a variety of new designs for the North American market.
		With two new-starts for DMU equipment firmly committed and several others close to moving ahead, a new era for the DMU in North America may be at hand.
		DMU equipment is specified for the 8.3-mile line, although the NPS will also entertain proposals for alternative-fuel vehicles.
	www.railwayage.com /jul00/dmu.html (1592 words)

	Santa Fe Railway Historical & Modeling Society :: Home
		Units 118L, 130L and 121L are all graduates from La Grange class of 1943.
		It was made up of four separate power units of 1350 HP each for a total of 5400 HP, a close equivalent to the HP rating of the most modern steam locomotives of the day including the Santa Fe 's new 3765 class 4-8-4's and 5001 class 2-10-4's.
		At the end of the run it was just "fill her up and check the oil" and head out on another train instead of a visit to the roundhouse for the labor intensive servicing required by a steam locomotive prior to another run.
	www.atsfrr.com /resources/funits/ft.htm (539 words)

	Welcome to the world of DEMUs! - Frequently Asked Questions (Site not responding. Last check: 2007-10-09)
		It is powered by an on-board diesel engine on one of the cars and consistes of two or more cars with a provision for the driver on either end of the train set.
		The transmission of the power from the diesel engine to the wheels is done by converting the mechanical energy into electrical energy (hence the electrical in its nomenclature) and feeding the electrical energy to traction motors on the wheels.
		On electrified territorry, the alternative mode of (rail) transport is the Electrical Multiple Unit (EMU) which is similar in construction, except that it does not carry a diesel engine and is dependent on the electric supply for traction.
	members.rediff.com /demucar/faq.htm (720 words)

	Colorado Railcar - DMU (Site not responding. Last check: 2007-10-09)
		Now for the first time a US built, FRA structurally compliant DMU is fully tested and able to run in mixed freight service.
		The DMU successfully completed its testing at the Transportation Technology Center (TTC) in Pueblo, Colorado and made its debut at the 2002 APTA Annual Conference in Las Vegas.
		The DMU then embarked on a nationwide tour, receiving accolades from transit officials and consultants at every stop.
	www.coloradorailcar.com /dmuhome.htm (228 words)

	Pontypool and Blaenavon Railway - DMUs and DEMUs
		Pontypool and Blaenavon Railway - DMUs and DEMUs
		The Class 108 Units on the railway are operated by the Gwent 108 Group.
		We are fortunate to have secured a Class 205 Thumper for our railway, carrying the unit number 205 018, we accepted it onto the PBR as a two-car unit (we didn’t think a three-car unit would make it up the bank!).
	www.pontypool-and-blaenavon.co.uk /pages/DMUsDEMUs.html (1338 words)

	TRB Annual Meeting Program
		The United States is experiencing a revival of interest in diesel multiple unit (DMU) passenger railcars.
		This paper quantifies the emissions into a region from diesel multiple units and the electricity generation for the electric rail modes, for oxides of nitrogen (NOx, an ozone precursor), particulate matter (PM), volatile organic compounds (VOCs, an ozone precursor), carbon monoxide (CO) and carbon dioxide (CO2).
		This paper concludes that emissions from diesel multiple units and electric rail modes are not dramatically different, on a per seat-mile basis, and the exact comparison will depend on the cleanliness of the electricity generation and the type of diesel multiple unit consist.
	gulliver.trb.org /am/ip/paper_detail.asp?paperid=10131 (287 words)

	diesel multiple unit - Search Results - MSN Encarta
		- diesel-powered self-contained train unit: a self-contained set of two or more railroad cars, one of which incorporates a motor powered by diesel fuel
		The year 1940 has been unprecedented in the number of streamlined trains that have been placed in service in the country, there being a total addition of 32 trains and 203 cars.
		The new locomotive is the result of almost five years of planning on the part of the N. and W.'s...
	encarta.msn.com /diesel+multiple+unit.html (272 words)

	Diesel, locomotive, multiple unit, batteries
		Starting a diesel engine calls for a reliable high-current power source for a short period of up to 30 seconds.
		For DMUs (Diesel Multiple Units) traction is provided by a diesel engine, instead of catenary or 3rd rail like metros and EMUs.
		For a cargo or passenger transportation companies, using diesel locomotives or DMUs, it is crucial to manage assets carefully.
	www.saftbatteries.com /080-MS_Rail/030-10-10_Diesel_locomotive_multiple_unit.asp (252 words)

	[IRFCA] Indian Railways FAQ:Multiple Units (EMU/DMU) and other self-propelled vehicles
		These 4-car units were dropped later as they put too high a load on the OHE power supply, and all 8-car rakes were converted to 9-car rakes by 1963.
		On CR, a 3-coach unit is classified as 76, 70, or 72, where 76 is the leading motor coach, 70 is the motor coach with a pantograph, and 72 is the trailer coach.
		Usually two such EMU units are coupled together, one supplying the power and the other converted to house an emergency medical treatment facility, where the diesel-generator supplies power for air-conditiioning, etc. The hospital units have emergency medical equipment and surgical facilities.
	irfca.org /faq/faq-mu.html (7178 words)

	Wireless streetcar gains momentum [Brotherhood of Locomotive Engineers and Trainmen]
		Known as diesel multiple unit cars (DMUs), these cousins of the electric streetcars are making inroads partially because they bring down the initial cost of building new transit lines by about 20 per cent by eliminating overhead wires and other electrical gear.
		The first diesel multiple unit light rail system in North America was Ottawa's O-Train, which began service in 2001 over a little-used Canadian Pacific Railway line in the city's west end, serving Carleton University.
		The result is that the initial cost advantage of the diesel multiple unit is lost over a long period of time due to high life-cycle and operating costs, not to mention the uncertainty of fuel prices.
	www.ble.org /pr/news/pf_headline.asp?id=12716 (974 words)

	Welcome to the South Florida East Coast Corridor Study
		Diesel Multiple Unit (DMU) is a form of commuter rail transit that is self-propelled with rail passenger cars that have internal diesel engines.
		From a technology perspective, LDEMU and Light Diesel Multiple Unit (LDMU) are the same.
		Some systems use Electric Trolley buses which are similar to either standard or articulated diesel powered buses, except that they are propelled by electric motors and obtain power from two overhead catenary wires along the route.
	www.sfeccstudy.com /other_transportation.html (1916 words)

	Ultradomes by Colorado Railcar
		DMU was envisioned as an affordable, practical extension of the manufacturer's normal business.
		Powered by twin Detroit Diesel 600hp engines connected to Voith hydrodynamic transmissions, the DMU is extremely powerfull yet surprisingly fuel efficient.
		DMUs will be available with the aero nose like the demonstrator, or with a more conventional flat nose.
	www.trainweb.org /ultradomes/dmu.html (420 words)

	The Diesel Multiple Unit
		The diesels only need to roar up at stations to accelerate the train (sounding a bit like a bus) and once it is up to speed, because of the very low friction involved the engines can drop down to ticking over, which is all that's required to keep the train moving.
		The majority of DMUs only have a top speed of 75 mph, ones built in the past 10 years (Class 158-166) can achieve 90 mph.
		For 1999 however all DMU to be ordered will be capable of 100mph (160km/h) and 9 High speed DMUs have been ordered which can travel up to 125 mph, which will be delivered in 1999.
	www.o-keating.com /hsr/dmu.htm (395 words)

	SRPS - Scottish Class 126 Heritage Diesel Project (Site not responding. Last check: 2007-10-09)
		With the run-down of these types over the years, it is difficult to imagine the revolutionary impact the new trains must have made upon introduction.
		The class 126 was one of the first types of DMU to be introduced: The class was a high specification type for inter city use and was used on the premier Scottish Region service from Glasgow to Edinburgh.
		Later units (of which the SRPS unit is one), were specially built for services from Glasgow to Ayrshire and Stranraer.
	www.srps.org.uk /srps/dmu/home.html (361 words)

	www.budd-rdc.org - The Budd RDC (Rail Diesel Car) (Site not responding. Last check: 2007-10-09)
		The Rail Diesel Car, also known as the RDC or Budd Car, was a series of self-propelled diesel passenger trains produced by the Budd company of Philadelphia between 1949 and 1962.
		One of the keys to the design of the Budd RDC units was their ability to be linked together with other similar units to operate as a single train under the control of one driver.
		However the reduction in diesel engine size during World War II due to their development for use in tanks, made the Budd company believe that underfloor diesel power was finally viable.
	www.budd-rdc.org /introduction.html (2033 words)

	Bodmin & Wenford Railway - Cornwalls only standard gauge steam railway (Site not responding. Last check: 2007-10-09)
		Whilst the B and W is predominantly a steam railway there are a number of diesel locos.
		One of locos 20166, 33110, 37142, 50042 or the DMU normally operates on Saturdays from April to October (except August) and on certain other special trains.
		The DMU normally operates the first train from Bodmin General to Bodmin Parkway and back Monday to Friday from June to September.
	www.bodminandwenfordrailway.co.uk /diesels/index.html (238 words)

	RDR - Stocklist - BR Battery Railcar Unit
		The unit (consisting of cars ScR 799998/799999) was a standard "Derby Lightweight" Diesel Multiple Unit body, but fitted with electric traction motors and large batteries housed underneath the coach bodies.
		The unit was bought by the West Yorkshire Transport Museum to be used on the Bradford Low Moors scheme, and was loaned to the East Lancashire Railway for restoration.
		With the collapse of the West Yorkshire Transport Museum, the Royal Deeside Railway Preservation Society was able to raise sufficient funds to purchase the BEMU from the liquidators of the failed museum, and the Battery Railcar returned to Deeside in 2001.
	www.deeside-railway.co.uk /pages/stocklist/battery_railcar.php (612 words)

	U.S. eyes German regional train - prospect for commuter rail service Railway Age - Find Articles (Site not responding. Last check: 2007-10-09)
		Powered by twin 650-hp MTU diesel engines, the trainset is equipped with three-phase a.c.
		Diesel multiple-unit trains are being considered for some news-start commuter rail services in the U.S. Burlington Northern, which already provides service on a contract basis for Metra in the Chicago area, is investigating dmu technology for corridors in Washington State (Seattle-Everett and Seattle-Tacoma), Vancouver, B.C., Kansas City, Houston, and Denver.
		Dmu technology, says D. Mitchell, assistant to the chairman at BN, can offer significant start-up, operating, and maintenance cost savings as compared to a diesel-hauled bi-level commuter train.
	www.findarticles.com /p/articles/mi_m1215/is_n6_v195/ai_15486404 (845 words)

	Diesel-electric multiple unit - Wikipedia, the free encyclopedia
		It is one variant of the diesel multiple unit (DMU).
		DEMUs were widely used in the United Kingdom after their introduction in the 1960s by British Rail.
		These units are a sharp contrast to the "Thumpers" and "Hastings" of old, they are air-conditioned through out, with powered doors and a top speed of 125 mph.
	en.wikipedia.org /wiki/Diesel-electric_multiple_unit (1147 words)

	The Hindu : Karnataka / Bangalore News : Another terminal to come up at Cantonment station
		Diesel multiple unit trains to be operated from the Cantonment initially
		Divisional Railway Manager of Bangalore Division Mahesh Kumar said that initially diesel multiple unit (DMU) trains will be operated from the Cantonment station.
		The plan is to construct at least four platforms within a span of one-and-a-half-year to run 12 pairs of trains, he said.
	www.hindu.com /2005/10/05/stories/2005100521500300.htm (428 words)

	Bombardier \| Transportation \| Rail Vehicles \| Commuter / Regional Trains \| Regional Trains \| VLocity 160 diesel ...
		Building on over 20 years’ experience in Australian regional passenger transport, the VLocity 160 diesel multiple unit (DMU) provides a flexible vehicle solution through the use of technology that has been tried and tested in local conditions.
		Based on the service proven Xplorer / Endeavour DMUs designed and manufactured at Bombardier Transportation’s Dandenong facility, the multiple unit set comprises two permanently coupled cars, with weatherproof inter-car connections, which can be readily coupled to form a train of up to eight cars.
		The vehicles are designed to operate at a maximum speed of 160 kph.
	www.bombardier.com /en/1_0/1_1/1_1_3_2_7.jsp (264 words)

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