2-4-2

2-4-2 (Columbia)

A Baldwin 2-4-2T locomotive, used on a private railway in Raahe, Finland. It was later bought by Finnish State Railways.

Equivalent classifications 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

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.