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25 relations: Alternating current, Altoona Works, Association of American Railroads, Brown, Boveri & Cie, Coupling rod, Direct current, Electric locomotive, General Electric, Hertz, Jackshaft, Jackshaft (locomotive), New York City, Overhead line, Pantograph (transport), Pennsylvania Railroad, Pennsylvania Railroad class DD1, Tap changer, Third rail, Twin unit, Universal motor, Volt, Westinghouse Electric Corporation, Wheel arrangement, Whyte notation, 2-4-4-2.
Alternating current
Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.
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Altoona Works
Altoona Works (also known as Altoona Terminal) is a large railroad industrial complex in Altoona, Pennsylvania.
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Association of American Railroads
The Association of American Railroads (AAR) is an industry trade group representing primarily the major freight railroads of North America (Canada, Mexico and the United States).
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Brown, Boveri & Cie
Brown, Boveri (BBC) was a Swiss group of electrical engineering companies.
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Coupling rod
A coupling rod or side rod connects the driving wheels of a locomotive.
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Direct current
Direct current (DC) is the unidirectional flow of electric charge.
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Electric locomotive
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor.
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General Electric
General Electric Company (GE) is an American multinational conglomerate incorporated in New York and headquartered in Boston, Massachusetts.
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Hertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
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Jackshaft
A jackshaft, also called a countershaft, is a common mechanical design component used to transfer or synchronize rotational force in a machine.
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Jackshaft (locomotive)
A jackshaft is an intermediate shaft used to transfer power from a powered shaft such as the output shaft of an engine or motor to driven shafts such as the drive axles of a locomotive.
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New York City
The City of New York, often called New York City (NYC) or simply New York, is the most populous city in the United States.
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Overhead line
An overhead line or overhead wire is used to transmit electrical energy to trams, trolleybuses or trains.
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Pantograph (transport)
A pantograph (or "pan") is an apparatus mounted on the roof of an electric train, tram or electric bus to collect power through contact with an overhead line.
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Pennsylvania Railroad
The Pennsylvania Railroad (or Pennsylvania Railroad Company and also known as the "Pennsy") was an American Class I railroad that was established in 1846 and was headquartered in Philadelphia, Pennsylvania.
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Pennsylvania Railroad class DD1
The Pennsylvania Railroad's class DD1 were semi-permanently coupled pairs of third rail direct current electric locomotives built for the railroad's initial New York-area electrification.
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Tap changer
A tap changer is a mechanism in transformers which allows for variable turn ratios to be selected in discrete steps.
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Third rail
A third rail is a method of providing electric power to a railway locomotive or train, through a semi-continuous rigid conductor placed alongside or between the rails of a railway track.
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Twin unit
A twin unit or twinset is a set of two railroad cars or locomotives which are permanently coupled and treated as if they were a single unit.
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Universal motor
The universal motor is a type of electric motor that can operate on either AC or DC power.
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Volt
The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.
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Westinghouse Electric Corporation
The Westinghouse Electric Corporation was an American manufacturing company.
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Wheel arrangement
In rail transport, a wheel arrangement or wheel configuration is a system of classifying the way in which wheels are distributed under a locomotive.
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Whyte notation
The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte, and came into use in the early twentieth century following a December 1900 editorial in American Engineer and Railroad Journal.
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2-4-4-2
In Whyte notation, 2-4-4-2 refers to a railroad steam locomotive that has two leading wheels followed by four coupled driving wheels, a second set of four coupled driving wheels, and two trailing wheels.
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References
[1] https://en.wikipedia.org/wiki/Pennsylvania_Railroad_class_L5
