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Index 4-8-8-4

A 4-8-8-4 in the Whyte notation for the classification of steam locomotives by wheel arrangement, is a locomotive with a four-wheel leading truck, two sets of eight driving wheels, and a four-wheel trailing truck. [1]

18 relations: Diesel locomotive, Driving wheel, French locomotive classification, Leading wheel, Mallet locomotive, Steam locomotive, Swiss locomotive and railcar classification, Trailing wheel, Turkish locomotive classification, UIC classification of locomotive axle arrangements, Union Pacific 4014, Union Pacific Big Boy, Union Pacific Railroad, United States, Western Pacific Railroad, Wheel arrangement, Whyte notation, 4-6-6-4.

Diesel locomotive

A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine.

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Driving wheel

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).

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French locomotive classification

Under the French classification system for locomotive wheel arrangements, the system is slightly different for steam and electric/diesel vehicles.

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Leading wheel

The leading wheel or leading axle or pilot wheel of a steam locomotive is an unpowered wheel or axle located in front of the driving wheels.

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Mallet locomotive

The Mallet locomotive is a type of articulated steam railway locomotive, invented by the Swiss engineer Anatole Mallet (1837–1919).

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Steam locomotive

A steam locomotive is a type of railway locomotive that produces its pulling power through a steam engine.

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Swiss locomotive and railcar classification

For more than a century, the Swiss locomotive, multiple unit, motor coach and railcar classification system, in either its original or updated forms, has been used to name and classify the rolling stock operated on the railways of Switzerland.

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Trailing wheel

On a steam locomotive, a trailing wheel or trailing axle is generally an unpowered wheel or axle (wheelset) located behind the driving wheels.

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Turkish locomotive classification

In the Turkish classification system for railway locomotives, the number of powered axles are followed by the total number of axles.

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UIC classification of locomotive axle arrangements

The UIC classification of locomotive axle arrangements, sometimes known as German classificationThe Railway Data File.

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Union Pacific 4014

Union Pacific 4014, or UP 4014, is a Big Boy-type (four-cylinder articulated 4-8-8-4) steam locomotive owned by Union Pacific Railroad.

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Union Pacific Big Boy

The American Locomotive Company 4000-class 4-8-8-4 locomotive, popularly named Big Boy, is an articulated, coal or oil-fired, steam locomotive manufactured between 1941 and 1944 and operated by the Union Pacific Railroad until 1959.

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Union Pacific Railroad

The Union Pacific Railroad (or Union Pacific Railroad Company and simply Union Pacific) is a freight hauling railroad that operates 8,500 locomotives over 32,100 route-miles in 23 states west of Chicago and New Orleans.

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United States

The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.

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Western Pacific Railroad

The Western Pacific Railroad was a Class I railroad in the United States.

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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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In Whyte notation, a 4-6-6-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of six driving wheels and four trailing wheels.

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[1] https://en.wikipedia.org/wiki/4-8-8-4

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