4-8-2

4-8-2 (Mountain)

Front of locomotive at left

NGR Hendrie D, an early example of a Mountain locomotive

Equivalent classifications UIC class 2′D1 French class 241 Turkish class 47 Swiss class 4/7 Russian class 2-4-1

First known tank engine version First use 1888 Country Colony of Natal Locomotive NGR Class D, Dübs A Railway Natal Government Railways Designer William Milne Builder Dübs & Company

First known tender engine version First use 1906 Country Colony of Natal Locomotive NGR Altered Class B Railway Natal Government Railways Designer David Hendrie Builder Natal Government Railways Evolved from 4-8-0 modified Evolved to 4-8-4 Benefits Improved stability at speed

First known "True type" version First use 1908 Country New Zealand Locomotive NZR X class Railway New Zealand Railways Department Designer A. L. Beattie Builder Addington Workshops Evolved from 4-6-2 Benefits Heavy freight haulage on mountainous sections of railway

Under the Whyte notation for the classification of steam locomotives, 4-8-2 represents the wheel arrangement of four leading wheels, eight powered and coupled driving wheels and two trailing wheels. This type of steam locomotive is commonly known as the Mountain type,^[1] though the New York Central Railroad used the name Mohawk for their 4-8-2s.