2-4-2 Columbia-type of Locomotive designed for high speed by the Baldwin Locomotive Works, 1893.
2-4-2 "Columbia" Steam Locomotive
Under the Whyte notation for the classification of steam locomotives, 2-4-2 represents the wheel arrangement of two leading wheels on one axle, four powered and coupled driving wheels on two axles and two trailing wheels on one axle. The type is sometimes named Columbia after a Baldwin 2-4-2 locomotive was showcased at the 1893 World's Columbian Exposition held at Chicago, Illinois.
The wheel arrangement was widely used on passenger tank locomotives during the last three decades of the nineteenth and the first decade of the twentieth centuries. The vast majority of 2-4-2 locomotives were tank engines, designated 2-4-2T. The symmetrical wheel arrangement was well suited for a tank locomotive that is used to work in either direction.
When the leading and trailing wheels are in swiveling trucks, the equivalent UIC classification is 1'B1'. While a number of 2-4-2 tender locomotives were built, larger tender locomotive types soon became dominant.
2-4-2 Columbia Overview
UIC class: 1B1, 1'B1'
French class: 121
Turkish class: 24
Swiss class: 2/4
Russian class: 1-2-1
First known tank engine version
First use: 1863
Country: United Kingdom
Locomotive: No. 21 White Raven
Railway: St Helens Railway
Designer: James Cross
Builder: Sutton Works
First known tender engine version
First use: 1877
Country: New Zealand
Locomotive: K class
Railway: New Zealand Railways
Builder: Rogers Locomotive Works
A 2-4-2 Columbian Slideshow.
Diagram of the 2-4-2 Wheel Arrangement: a single small leading wheel, two large coupled wheels and a single small trailing wheel.
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Text: wikipedia.org. Images: Public Domain; http://www.commons.wikimedia.org (unless otherwise specified) and 17 U.S. Code § 107 fair use. References: Lewis, Robert G. The Handbook of American Railroads. New York: Simmons-Boardman Publishing Corporation, 1951, 2nd Edition 1956. Site Map Contact webmaster HERE.