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Especially in steam days, wheel arrangement was an important attribute of a locomotive because there were many different types of layout adopted, each wheel being optimised for a different use (often with only some being actually "driven"). Modern diesel and electric locomotives are much more uniform, usually with all axles driven.
The Whyte notation is a classification method for steam locomotives, and some internal combustion locomotives and electric locomotives, by wheel arrangement. It was devised by Frederick Methvan Whyte, [2] and came into use in the early twentieth century following a December 1900 editorial in American Engineer and Railroad Journal.
No description. Template parameters [Edit template data] Parameter Description Type Status name name The article title, e.g. 4-4-0 (The most commonly used name of the wheel arrangement, in brackets) Example 4-8-2 (Mountain) Line optional image (schematic) image Wheel arrangement schematic File optional image size (schematic) imagesize image_size no description Unknown optional alt alt ...
Between 1931 and 1936 they were rebuilt with a 4-6-2T wheel layout and re-classified as A8. [4] The H Class locomotives built for the Metropolitan Railway in the 1920s are an example of both these factors leading to a rare use of the 4-4-4 arrangement. 242.001 at the Hungarian Railway Museum
Union Pacific 844, the only steam locomotive never retired by a North American Class I railroad. The 4-8-4 wheel arrangement was a progression from the 4-8-2 Mountain type and, like the 2-8-4 Berkshire and 4-6-4 Hudson types, an example of the "Super Power" concept in steam locomotive design that made use of the larger firebox that could be supported by a four-wheel trailing truck, which ...
Under the Whyte notation for the classification of steam locomotives, 4-2-0 represents the wheel arrangement of four leading wheels on two axles, two powered driving wheels on one axle and no trailing wheels. This type of locomotive is often called a Jervis type, the name of the original designer.
A locomotive with two bogies, each with two leading axles and three individually powered axles. A number of Japanese electric locomotives used this wheel arrangement, including the JNR Class EF58, and the PRR GG1. D Four powered axles, connected by driving rods or gears, all mounted in the locomotive's frame (Whyte notation: 0-8-0). 1′D1′
While the wheel arrangement and type name Atlantic would come to fame in the fast passenger service competition between railroads in the United States by mid-1895, [1] the tank locomotive version of the 4-4-2 Atlantic type first made its appearance in the United Kingdom in 1880, when William Adams designed the 1 Class 4-4-2 T of the London, Tilbury and Southend Railway (LT&SR).