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Topic: Mallet locomotives

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	Mallet locomotive - Wikipedia, the free encyclopedia
		Mallet's original design was a compound locomotive, in which the steam is used twice, first in a set of high-pressure cylinders, and then in a set of low-pressure cylinders.
		Unlike the case of the rigidly-framed locomotive, the Mallet design is actually simpler as a compound, and complex as a simple, since then steam pipes and exhaust piping is needed for both pairs of cylinders.
		Mallet's original design was intended to allow a medium-size locomotive to better negotiate the tight curves of a narrow gauge railway, but the Mallet design grew to enormous size in the United States, where it was used to permit locomotives to be built to sizes impossible with a single, rigid frame.
	en.wikipedia.org /wiki/Mallet_locomotive (451 words)

	Steam locomotive - Wikipedia, the free encyclopedia
		Steam locomotives were the dominant form of rail traction until superseded in the mid 20th century by diesel and electric locomotives.
		Mallet locomotives went through a similar transformation and were upgraded from helpers into huge road engines with gargantuan fireboxes; their drivers increased in size in order to allow faster running.
		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.
	en.wikipedia.org /wiki/Steam_locomotive (3508 words)

	2-8-8-2 - Wikipedia, the free encyclopedia
		A 2-8-8-2, in the Whyte notation for describing steam locomotive wheel arrangements, is an articulated locomotive with a two-wheel leading truck, two sets of eight driving wheels, and a two-wheel trailing truck.
		The locomotives were adopted by a broad spectrum of mountain railroads, including the Norfolk and Western, Southern, Virginian, Clinchfield, Denver and Rio Grande, Reading, Western Maryland, Missouri Pacific, Frisco, and the Duluth, Missabe and Iron Range.
		The very last compound Mallet locomotives to operate in the United States were the 2-8-8-2 Y6b class of the Norfolk and Western Railway.
	en.wikipedia.org /wiki/2-8-8-2 (301 words)

	An Overview of Mallet locomotives (Site not responding. Last check: 2007-10-31)
		On a compound Mallet, live steam from the boiler enters the rear cylinders, and it is the exhaust from the rear engine that powers the forward low-pressure cylinders (see figure 2).
		Exceptions to this were such locomotives as Norfolk and Western's famous Y class 2-8-8-2s, which were still being built as compounds into the 1950s, and of course the logging Mallets, of which all but six were compounds.
		While it is not technically correct to call them Mallets since they are not compounds as per the Mallet patent, simple articulateds like Weyerhaeuser #111 were identical in design concept to a regular Mallet except for the fact that live steam was delivered to both sets of cylinders at the same time (see figure 3).
	loggingmallets.railfan.net /sub/malletinfo.htm (346 words)

	Articulated Locomotives
		AN articulated locomotive is a locomotive having one or more of its driven axles capable of taking up positions in which they do not remain parallel to the others, so that they assume angular positions when rounding curves.
		In contrast to the "Mallet," which normally has each pair of cylinders placed to the fore of each wheel group, the four cylinders of the "du Bousquet" are bunched together opposite one another at the centre of the locomotive.
		The geared locomotive has its draw-gear and buffing—twin "buffers," as known in Britain, are often dispensed with abroad—attached to the rigid main frame, and not to the mobile truck, as with most other articulated locomotives.
	mikes.railhistory.railfan.net /r095.html (6343 words)

	Mallet Articulated Locomotives
		In an articulated compound locomotive having twice as many driving wheels as a given locomotive of the rigid-frame type, double the tractive power of the latter is available, with the same weight per driving wheel on the rail and with no increase in the length of the rigid wheel base.
		When the locomotive is changed into simple working, the emergency valve, 6, is opened, which allows the exhaust steam from the high pressure cylinders to pass through the wrought iron pipe to the exhaust pipe in the smoke box and to the atmosphere.
		Should the maximum power of the locomotive be required in starting or in ascending a heavy grade, it may be had at any time by simply turning the emergency operating valve N in the cab so that the handle points to the rear.
	www.catskillarchive.com /rrextra/mallet.Html (8524 words)

	THE BALDWIN LOCOMOTIVE WORKS — 1912--Mallet Articulated Locomotives
		In a locomotive of this type, it is not necessary to have sliding supports under the forward part of the boiler; and the locomotive curves with a minimum amount of resistance, and its stability, when traversing a curve, is not affected.
		The high-pressure cylinders of a Mallet articulated locomotive are lubricated from the cab in the usual manner.
		Before starting a Mallet locomotive on a trip, care should be taken that the air pressure is fully pumped up, and that the valve admitting air from the main reservoir to the cylinder of the power reverse, is open.
	www.catskillarchive.com /rrextra/blwmal00.Html (4227 words)

	Mallet
		Mallet was born at Carouge, near Geneva, in 1837, and studied and later taught engineering at the Paris Ecole Centrale des Arts et Manufactures.
		Although, at its peak of popularity, the Mallet locomotive was ordered by railways in many parts of the world, it was only in America that it retained its market up to the end of the age of steam.
		As for Anatole Mallet, it is said that he did not approve of the concept of the simple Mallet locomotive, as he had evolved his system of articulation as a means of promoting his compound system.
	www.steamindex.com /people/mallet.htm (1107 words)

	Flexible-Boiler Mallet Locomotives. (Site not responding. Last check: 2007-10-31)
		A Mallet has the forward set of driving wheels pivoted under the front of the boiler, while the rear set is rigidly attached.
		Mallet chose this arrangement so the HP steam pipes did not have to be flexible.
		The idea originated with Samuel Vauclain of the Baldwin Locomotive company in 1910, and was prompted by the discovery that the combustion gases were no longer transferring heat to the water by the time they were some 22 feet ahead of the boiler.
	www.dself.dsl.pipex.com /MUSEUM/LOCOLOCO/flexmallet/mallet.htm (477 words)

	Stateside Switchers - (3) Baldwin 2-4-4-2 Mallet
		The Mallet type of locomotive was introduced to meet a growing demand for a locomotive having exceptionally high tractive effort, combined with the ability to readily traverse sharp curves.
		The superheater itself is arranged as in a single expansion locomotive; but in a Mallet, the high pressure steam pipes must necessarily extend back from the superheater header in the smokebox, to the high pressure cylinders.
		It is perhaps a pity that the drawings of the locomotives and rolling stock are not of a quality in keeping with the remainder of the book, but the well-chosen photographs which illustrate all aspects of the subject adequately compensate for this short-coming.
	www.irsociety.co.uk /Archives/15/Stateside_3.htm (2012 words)

	Continental engineers
		Westwood claims that Jules Anatole Mallet was remarkable amongst late nineteenth century innovators in that he achieved a influential success both in compounding and in a method for articulating the driving wheelbase.
		According to Marshall Meyer was born in 1804 was educated in Paris and died in Vienna in 1877.
		Its widespread adoption enabled the locomotive to be driven in accordance with the task facing it; that is, how its steam could be utilized at any given moment was in the control of the locomotive crew.
	www.steamindex.com /people/contengr.htm (7265 words)

	RCT&HS Glossary
		ALCO (American Locomotive Company)—Originally formed as a steam locomotive manufacturer from several small builders, ALCO diversified into diesel power relatively early, but was plagued till its end by a (not always deserved) reputation of unreliability (though the Reading faired well with their seizable fleet of RS-3s).
		MLW continued to produce locomotives for the Canadian and export markets for several years and in 1975 was acquired by Bombardier, which ceased production of diesel locomotives in 1985.
		Pacific—a steam locomotive with a 4-6-2 wheel arrangement, 4 pony truck wheels up front, 6 driving wheels in the middle and 2 trailing truck wheels at the rear under the firebox (click here for a photo of a Reading class G-3 Pacific).
	www.readingrailroad.org /reference/ref_glossary.html (1181 words)

	Lionel 2-8-8-2 Steam Locomotives - Intro
		These locomotives were the biggest that the USRA had ever designed and were destined for the Norfolk and Western Railway.
		The Santa Fe was not particularly fond of articulated mallet locomotives like the 2-8-8-2, but had little choice as the war heated up in the Pacific and their overwhelmed mainline threatened to come to a standstill.
		Back in the South, the locomotives were back to doing what they did best—slowly and steadily hauling a hundred or so loaded coal hoppers up and down a sawtooth mainline.
	www.lionel.com /PDF/2-8-8-2_page2.html (582 words)

	Articulated Locomotive Specifications
		These were the first locomotives built with this wheel arrangement, which united the pulling power of the 0-6-6-0 that ran so successfully on the B&O with both lead and trailing trucks for more flexible operation.
		The new Class Z-3 Mallets are used on the Rocky Mountain and Seattle Divisions, four coal burners on the Rocky Mountain Division and six oil burners on the Seattle Division.
		These locomotives are handling 2,200 tons from Auburn to Ellensburg at a speed of from eight to 14 miles per hour, on a total oil consumption of 2,645 gallons.
	www.steamlocomotive.com /articulated/data.shtml (9687 words)

	2-8-8-8-2 Articulated Steam Locomotives
		Mallet locomotives were articulated; that is, they had at least two sets of drivers, one of which could swing free of the boiler, allowing a very long and powerful locomotive to make its way around fairly tight curves with the boiler overhanging the curve.
		The version of the Mallet on this page, the Triplex had THREE separate steam chests and drivers, on the theory that if two were good, three would be better.
		The next photo shows the detail on the smokebox, including the antique-appearing marker lights and headlight, befitting a locomotive made during the early part of the 20th century.
	www.toytrains1.com /triplex.htm (314 words)

	Data sheet of Mallet-loco 99 5906 of the HSB (Site not responding. Last check: 2007-10-31)
		Whilst both of these locomotives feature an extermal frame for the high pressure drive, the 99 5906 is rekitted to a compressed-air brake system both for the pivoted bogie and for the high-pressure driving mechanism.
		However, the handover of the locomotive was stalled on the basis of interim court injunctions on the grounds of the legal monument protection regulations and thanks to the personal efforts of some railway workers.
		Since December 1995 the locomotive is predominant in the use with regular courses on the Selketal-railway.
	www.hsb-wr.de /triebfahrzeuge/9956date.htm (507 words)

	Mountain Subdivision - M&K Junction
		As part of the West End's conversion to mallet steam locomotives, MandK Jct became an important location on the St. Louis mainline when a new helper facility was opened during 1913 which replaced a previous helper base at Rowlesburg.
		In 1949 a similar helper facility at Hardman was closed resulting in its locomotives and crews being transferred east to MandK Junction and bringing Newburg Grade under the control of the "River Rats", the BandO slang for the MandK crews.
		With this reduced need for crews and individual locomotives (each F7 set was basically viewed as one locomotive), the BandO rebuilt the MandK facilities for diesel units in the early 1950s which effectively ended the steam locomotive's career in helper service on three grades of the West End.
	www.wvrail.railfan.net /mk.html (1833 words)

	Names of RhB Locomotives
		The early electrical locomotives, from the G 2/4 (1912) to the Ge 6/6 I ("Crocodile"), were also never given a name.
		Unfortunately, the class Ge 4/4 III engines that are used as advertising locomotives are more often called by the company that they are promoting than by their proper name.
		Though locomotive No. 11 is known as "Heidi" today, it was only given this name long after its active duty when it was used in one of the numerous filmings of Johanna Spyri's "Heidi" novels.
	www.ozdoba.net /rhb/loknamen_e.html (342 words)

	Booth Kelly Lumber Company #2
		The split side tank design used on #2, and later on Booth-Kelly #6 and the two St. Paul and Tacoma Mallets, was used to accommodate the steam delivery pipes to the high-pressure cylinders.
		Baldwin's Record No. 68 Mallet Articulated Locomotives notes that Booth-Kelly was operating #2 on fifty-six pound rails with six and one half percent grades and thirty-five degree curves, and #2 could be used on up to nine percent grades.
		The locomotive remained in storage until 1947 when it was scrapped.
	loggingmallets.railfan.net /list/bkelly2/bk2.htm (457 words)

	Resources
		Steam and Thunder in the Timber: Saga of the Forest Railroads.
		LeMassena, Robert A. Articulated Steam Locomotives of North America Vol 1.
		LeMassena, Robert A. Articulated Steam Locomotives of North America Vol 2.
	loggingmallets.railfan.net /sub/resources.htm (412 words)

	2-8-8-2 Mallet Steam Locomotive
		Built on a pair of our 4 axle ball bearing equipped power trucks, the Mallet is sure to raise the bar and create a higher standard for all G-Scale steam locomotives.
		The standard tender for the 2-8-8-2 Mallet Steam Locomotives will be a U.S.R.A. Tender.
		The 2-8-8-2 Mallet Steam Locomotives with Vanderbilt Tenders may come equipped with two 3-Axle trucks (6 axles) under the tender.
	www.aristocraft.com /catalog/locomotives/2-8-8-2/index.html (341 words)

	Tomfolio.com: Transportation: Railroads, Steam Locomotives (Site not responding. Last check: 2007-10-31)
		Locomotives of the Western Pacific Feather River Route: A Photo Story of Steam Publisher: circa 1954.
		This one concentrates instead on the steam locomotives of the early years of the railroad.
		The photographs of steam locomotives used in the western U.S. are unusually clear and bright and detailed.
	www.tomfolio.com /bookssub.asp?subid=1109 (2648 words)

	French steam compound locomotives home. Welcome! (Site not responding. Last check: 2007-10-31)
		As you may know, he is the first to have successfully applied compounding to locomotives.
		He obtained equal power from the high and low pressure cylinders when pre-Chapelon machines (the better ones, at least) had about 75% of their total power produced by the high pressure cylinder(s) and only the remaining 25% by the low pressure cylinders...
		A brief (hum!) introduction to the advantages and benefits of (efficient) compound systems applied to locomotives based on Stephenson's concepts (well documented arguments and examples extracted from Andre Chapelon's books, conferences, experiments, reports and letters), as well as other reasons that research for greater efficiency was so strongly supported here in France.
	members.tripod.com /~Norton_DataCAD/frsteaml/home.htm (632 words)

	Wall Layout
		It was a 25 ton, Class B, narrow gauge locomotive featuring cylinders positioned alongside the boiler at an elevation of 40 degrees.
		In the 1930s, the Uintah Railway in Utah and Colorado bought two Mallet locomotives from Baldwin.
		When the Uintah shut down, the Mallets were sold to the Sumpter Valley RR in Oregon.
	www.stanstrains.com /WallLayout.htm (1015 words)

	myLargescale.com - Freelancing a Mallet - All About Your Garden Railroad & G Scale Trains
		If you are at all like me, you will have a love of articulated locomotives and Mallet's in particular.
		Narrow gauge in the US was already in decline by the time the Mallet locomotives could have made an impact.
		If one were to model a prototypically accurate narrow gauge Mallet that was not the Unitah 2-6-6-2, then looking further afield will offer a plethora of appropriate US built export NG Mallets.
	www.mylargescale.com /articles/articles/mallet/mallet01.asp (228 words)

	Baldwin Mallets (Site not responding. Last check: 2007-10-31)
		Welcome to the resource page for the Mallets of the Baldwin Locomotive works.
		In this section of the site you will find prototype information you may find to be useful if you wish to model one of these locomotives.
		Skookum Archive - photos and specifications on the Baldwin 2-4-4-2 Skookum currently resting in a disassembled form in the Pacific Northwest.
	www.ironhorse129.com /Prototype/Mallet/Mallet.htm (92 words)

	[No title]
		The Heisler Locomotive, 1891-1941, by Walter Casler, 149/133
		Cavalcade of New Zealand Locomotives, by Palmer and Stewart, 97/86
		The Steam Locomotive, by Edgar A. Haine, 165/136
	www.rlhs.org /ridxBR2.htm (6718 words)

	Chicago & North Western Historical Society - Chicago Great Western - A Capsule History
		So the image of the CGW that remains is essentially positive, and it still has many dedicated fans, non-withstanding the fact that it was merged out of existence in 1968.
		They roamed most of the system on the main lines (avoiding light rails), and they pulled the long freights for which the CGW had become famous.
		1930’, early The East Stockton Terminal is shut down with the departure of the Mallet locomotives.
	www.cnwhs.org /ch_cgw.htm (1533 words)

	RailroadData.Com Train Links: Mallets in the Tall Timber
		Top : Locomotives and Rolling Stock : Steam Locomotives : Mallets in the Tall Timber
		A web page dedicated to the history of the Baldwin logging Mallet.
		However, another interesting aspect of the history of articulated locomotives in America are the Baldwin Logging Mallets, of which forty-four were built between 1909 and 1937.
	www.railroaddata.com /rrlinks/Detailed/2892.html (137 words)

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