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Topic: Duplex locomotive

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	NationMaster - Encyclopedia: Driving wheels (Site not responding. Last check: 2007-10-20)
		On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive).
		On a conventional, non-articulated locomotive, the driving wheels are all coupled together with side rods (also known as coupling rods); normally one pair is directly driven by the main rod (or connecting rod) which is connected to the end of the piston rod; power is transmitted to the others through the side rods.
		On an articulated locomotive or a rigid-framed locomotive with divided drive, such as a Duplex locomotive, driving wheels are grouped into sets which are linked together within the set.
	www.nationmaster.com /encyclopedia/Driving-wheels (480 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: 2007-10-20)
		Although the locomotive hauled a train of 10 tons of iron and 70 passengers in five wagons over nine miles it was too heavy for the cast iron rails used at the time.
		Locomotives may generate their power from fuel (wood, coal, petroleum or natural gas), or they may take power from an outside source of electricity.
		With Diesel-electric and electric locomotives, the gear ratio between the traction motors and axles is what adapts the unit to freight or passenger service, although a passenger unit may include other features, such as head end power (aka hotel power) or a steam generator.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=locomotive (2669 words)

	Duplex - Wikipedia, the free encyclopedia
		A duplex locomotive is a type of steam locomotive.
		A duplex lamp is a type of oil lamp invented by Joseph Hinks.
		A "duplex reticle" in shooting terminology is a type of crosshairs reticle that is thicker on the edges, tapering to thin in the center of the scope's sight picture.
	en.wikipedia.org /wiki/Duplex (291 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal (Site not responding. Last check: 2007-10-20)
		Duplex locomotives with two engines in one rigid frame were also tried, but were not notably successful.
		The weight of the locomotive is roughly proportional to the power output; the number of axles required is determined by this weight divided by the axleload limit for the trackage where the locomotive is to be used.
		The introduction of diesel-electric locomotives in the first part of the 20th century spelled the end of steam locomotives, though they were used in the North American and Europe to mid-century, and continued in use in other countries to the end of the century.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=steam_locomotive (5740 words)

	Part Three - Baldwin 60000
		Locomotive 60,000 was operated on the test plant without change in the counterbalancing, and speeds up to 200 revolutions per minute (37.5 miles per hour), were attained without excessive vibration.
		Locomotive 60,000 was equipped with a Worthington heater having a capacity of 60,000 pounds per hour which is large enough to supply all of the feedwater required in the heaviest tests.
		The locomotive was operated with full throttle and fixed cut-off, and an attempt was made to keep the speed as nearly uniform as possible by entering the test stretch at a speed at which it was estimated the train could be hauled.
	www.cwrr.com /Lounge/Reference/baldwin/part03.html (4331 words)

	To Improve The Locomotive Engine Service of American Railroads \| railroad stories (Site not responding. Last check: 2007-10-20)
		As an aid to this end, and that the railroad companies may derive the highest efficiency from the man employed as a locomotive engineman, a code of questions is given him, and it is expected that the preparation necessary to correctly answer the questions will indicate how well he has progressed.
		It is not expected that all the breakdowns which may happen to a locomotive will occur on the engine that he is with; therefore it is good practice to observe how other men care for these breakdowns.
		In connection with these examinations the work done by the fireman during the year and how the work compares with that of other firemen in the same class of service will be carefully noted; his record as to the use of coal, supplies and attention to duty will be taken into consideration.
	www.geepe.com /railroad-stories/improve-locomotive-engine-service-railroads (672 words)

	Duplex Information - duplex plans
		A modular duplex home duplex locomotive is a type of steam floor+plans, half duplex duplex locomotive.
		A duplex lamp is a type of oil north carolina duplex fixer upper for sale lamp the duplex invented st. louis duplex realtor by duplex Joseph duplex manitowoc duplex rental builders Hinks.
		Duplex (movie) is a 2003 duplex rentals duplex for rent duplex + collate + multifunction movie starring radio duplex gwinnett ga scanning stillwater, duplex steel ok, duplex duplex for rent in milwaukie,or duplex how floor plans for duplex homes Ben Stiller.
	www.inanot.com /Ina-Electronics_Topics_D-/Duplex.html (335 words)

	HO Q2 New Prod History
		Unlike other duplexes and articulated locomotives, the cylinder size of the front and back units were not the same, each set' s dimensions being set by the number of drivers they would power.
		After decades of conservative locomotive practice, the new Q-2's embodied many radical practices to the Pennsylvania, such as Timken roller bearings on all axles, floating bushings on all valve gear pins, Worthington SA feedwater heaters, combustion chambers and Franklin Type E boosters on the trailing engine truck.
		With delivery of new diesel freight locomotives, the PRR decided to set aside their most modern and complex locomotives and by the end of summer of 1949, all were in storage, most of them at Crestline, Ohio.
	www.keyimportsinc.com /ho_q2_new_prod_history.htm (659 words)

	Hp Duplexer
		A duplexer is a device that combines two or more signals onto a common channel or medium to increase its transmission efficiency.
		Duplex also means double-sided printing -- It is a common term in the printer market as well as in industries that handle paper.
		Time division duplex has a strong advantage in the case where the asymmetry of the uplink and downlink data speed is variable.
	www.artistbooking.com /trips/110/hp-duplexer.html (736 words)

	Balanced Locomotives.
		One of the problems with the conventional type of steam locomotive is the presence of forces caused by the pistons, piston-rods, crossheads etc moving back and forth.
		As these masses are accelerated and decelerated, the reaction forces cause the locomotive to also accelerate and decelerate by a much smaller amount; it is still enough to make the riding rough and uncomfortable.
		This locomotive also had two cylinders on each side, but mounted beside each other, a solution that was probably made possible by the larger American loading gauge.
	www.dself.dsl.pipex.com /MUSEUM/LOCOLOCO/balanced/balanced.htm (669 words)

	LOCOMOTIVE - GoGoSearch.com
		Aerodynamic passenger locomotives from other countries such as Germany and the United States attained speeds very close to this, and this is generally believed to be close to the practicable upper limit for the direct-coupled steam locomotive.Before the middle of the 20th century, electric and diesel-electric locomotives began replacing steam locomotives.
		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.
		Dual-mode diesel-electric/third-rail locomotives are operated by the Long Island Rail Road and Metro-North Railroad between non-electrified territory and New York City because of a local law banning diesel-powered locomotives in Manhattan tunnels.
	www.gogosearch.com /wiki/locomotive (2538 words)

	Duplex
		Locomotive Duplex (1862) was an experimental Austrian steam locomotive, first 4-cylinder in the world
		Duplex can refer to a concurrency (road) involving two highways sharing the same roadbed.
		The Duplex Typewriter (1894) was a full keyboard upstrike typewriter designed by A. Dennis and produced by George Jewett.
	www.danceage.com /biography/sdmc_Duplex (275 words)

	Locomotive information - Search.com
		A locomotive (from Latin loco motivus) is a railway vehicle that provides the motive power for a train, and has no payload capacity of its own; its sole purpose is to move the train along the tracks.
		Aerodynamic passenger locomotives from other countries such as Germany and the United States attained speeds very close to this, and this is generally believed to be close to the practicable upper limit for the direct-coupled steam locomotive.
		Freight locomotives are normally designed to provide a high torque and deliver high power levels to the rails while passenger locomotives are designed to operate at high speeds, typically with lower loads.
	www.search.com /reference/Locomotive (3802 words)

	Märklin Trains: Scales>> Z Gauge>> Rolling Stock - American
		Both locomotive units are permanently coupled to one another with a drawbar.
		The two locomotive units are permanently coupled to one another with a drawbar.
		Prototype: 1 Chesapeake and Ohio steam locomotive with a tender and 1 Chesapeake and Ohio caboose.
	www.marklin.com /scales/z/products-am.html (1573 words)

	Duplex locomotive - Wikipedia, the free encyclopedia
		A duplex locomotive is a steam locomotive that divides the driving force on its wheels by using two pairs of cylinders rigidly mounted to a single locomotive frame; it is not an articulated locomotive.
		A "duplex" version of a 4-8-4 would be a 4-4-4-4, with the eight driving wheels split into two groups of four, each with its own set of cylinders and valve gear.
		The locomotive was completed in May 1937 and managed to retain the same coupled wheelbase as the road's current 4-8-2s by having the second set of cylinders reversed, mounted alongside the firebox, and driving the second set of coupled wheels forwards.
	en.wikipedia.org /wiki/Duplex_locomotive (1576 words)

	TGVweb - TGV Photos - TGV Duplex
		Duplex trainset testing on the LGV Sud-Est, as seen from the cab of another TGV.
		Duplex trainset 201 at the Euralille high speed rail conference in 1995.
		Past meets Future: Duplex trainset 202 and steam locomotive 141TB 424 meet up in the Mulhouse train station, celebrating the 25th anniversary of the Musée du Chemin de Fer (rail museum) on 21 September 1996.
	www.trainweb.org /tgvpages/images/duplex (478 words)

	Chesapeake & Ohio Tests the PRR T1 Chesapeake and Ohio Historical Magazine - Find Articles
		Locomotive histories do not normally involve the interrelationship of between-carrier competition, technology change, corporate policy and politics, economics, finance, engineering, and operations.
		The duplex concept was valid from an engineering standpoint, but like most improvements it had consequences that may not have been considered in the initial stages of development.
		This is a disadvantage of the duplex drive concept and cannot be ignored or dismissed.
	www.findarticles.com /p/articles/mi_qa3943/is_200505/ai_n13642634 (893 words)

	physics - PRR S1
		The S1 was a duplex locomotive : it had two pairs of cylinders, each driving two pairs of driving wheels, but its driven wheelbase was rigid, unlike similar-looking articulated locomotive designs.
		It was hoped that the locomotive could haul 1,000 tons at 100 miles per hour, but this goal was not reached.
		Furthermore, the locomotive's extreme length limited its usefulness as it was incapable of negotiating curves on most lines of PRR track.
	www.physicsdaily.com /physics/PRR_S1 (155 words)

	UP 2564
		This engine was built by the American Locomotive Co. at their Brooks Works in Dunkirk, NY, in 1921.
		The OSL requested this type of locomotive because of its duplex coal stoker, which seemed to work better with their grade of coal.
		In 1996, a required modernization of the park forced the removal of the locomotive, and the Museum acquired it from the county.
	www.oerm.org /pages/up2564.html (478 words)

	Whyte notation - Definition, explanation
		The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte and came into use in the early 20th century.
		Thus, a locomotive with two leading axles (and thus four wheels) in front, then three driving axles (six wheels) and followed by one trailing axle (two wheels) is classified as a 4-6-2.
		The scheme generally adopted is that locomotives such as Garratts, where there are, in effect, two separate locomotives joined by a common boiler, are classified by using a plus sign in between the arrangements of each engine.
	www.calsky.com /lexikon/en/txt/w/wh/whyte_notation.php (531 words)

	Steamtown NHS: Special History Study
		These locomotives featured feedwater heaters, power reverse gear, and automatic or mechanical stokers, and they were the first locomotives on the Grand Trunk Western to feature both Vanderbilt tenders and enclosed, vestibuled or all-weather cabs.
		Locomotive No. 6039 is one of about 17 Grand Trunk Western Railroad engines that have survived in the United States, of which 10 are 0-8-0 switch engines, so that No. 6039 is one of only seven Grand Trunk Western road engines, and the only 4-8-2 of the railroad to survive.
		As with many locomotives in the collection, this engine had its drive rods removed for the move from Bellows Falls to Scranton, and those need to be reinstalled.
	www.cr.nps.gov /history/online_books/steamtown/shs2h.htm (1257 words)

	Locomotive Wheel Arrangement Designations
		For example, (1'Bo)(Bo1') is a locomotive supported on two frames, each with a leading carrying axle that can move sideways and two independent driving axles.
		A 4-6-2 is a locomotive with four leading carrying wheels, six driving wheels, and two trailing carrying wheels.
		A 2-6-6-4 is a locomotive with two leading carrying wheels, two sets of six driving wheels, and four trailing wheels.
	www.du.edu /~jcalvert/railway/wheelarr.htm (837 words)

	National Technical Museum / Steam locomotive KLADNO (Site not responding. Last check: 2007-10-20)
		A half-tender steam locomotive KLADNO was manufactured by the engineering works of Vienna-Raab railway in 1855 under the serial number 295.
		The locomotive was used mainly for transport of coal on the basic railway of the company from Kladno to Kralupy nad Vltavou since beginning of traffic in 1856.
		Technical specification: axle arrangement C2', duplex steam engine with external flat slide valves on cylinders and valve gear Gooch, third wheel set driven, hand screw brake on both tender axles.
	www.ntm.cz /en/glossary/steam-locomotive-kladno (141 words)

	Cattron-Theimeg Inc. Accuspeed
		Cattron-Theimeg continues to be the recognized technology leader in the design and implementation of LRC (Locomotive Remote Control) systems with more than 57 years of radio frequency experience and nearly 10,000 locomotive and rail related installations worldwide.
		Immediate warning that data communication is lost with the locomotive provides critical seconds of warning to an OCU operator to prepare for an eventual stopping.
		When a locomotive is at a certain track position, EPD can automatically initiate a variety of commands that will ensure certain functions that are supposed to occur activate as needed, and functions that are not supposed to take place are disabled.
	www.cattron.com /csa/accuspeed.html (513 words)

	Steam Locomotive Builders
		In fact, all of the locomotive manufacturing (except in Canada) was consolidated in Schectady by 1931 and continued until 1968.
		The American Locomotive Company was known for its steam locomotives of which the 4-6-4 Hudsons and the 4-8-4 Niagras built for the New York Central and the 4-6-6-4 Challengers and the 4-8-8-4 Big Boys it built for the Union Pacific were its finiest examples.
		In the later days of the steam era, Baldwin was in the forefront of locomotive construction with the many 2-8-2 Mikados it built and its ability to build small quantities of unique designs, such as the Cab Forward 4-8-8-2's it built for the Southern Pacific.
	www.steamlocomotive.com /builders (1952 words)

	Duplex locomotive (Site not responding. Last check: 2007-10-20)
		A duplex locomotive is a steam locomotive that divides the driving force on its wheels by using two pairs of cylinders.
		While a 4-4-4-4 could certainly be built as an articulated locomotive, duplex locomotives as a rule had rigid frames.
		Using a duplex drive meant that the pistons could be smaller and the side rods lighter.
	www.toolhost.com /Duplex_locomotive.html (342 words)

	Steam locomotive tractive effort vs diesel electric horsepower - Trains.com Forums
		Horsepower on a steam locomotive is variable and is dependent on boiler capacity, size of the firebox grate, superheating capacity, type of valves on the cylinders, and a host of other items.
		The formula for calculating steam locomotive HP is correct, it is well known that steam loco hp is limited only by mechanical technology, had the steam locomotive continued developement we would have seen how limitless they really are, just the developement of poppet valves made a big difference in the valve efficiency.
		It is true that a diesel locomotive HP is infinite you can increase RPM, increas the fuel etc in fact EMD did just that on the DD 40X, they took a regular 16 645 e3 and raised the RPM to 950 instead of 900 and increased the horsepower to 3300 instead of 3000.
	www.trains.com /TRC/CS/forums/1/248626/ShowPost.aspx (2762 words)

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