4-6-2 (Pacific)Front of locomotive at left |
New Zealand's Q class, the first true Pacific locomotive |
| Equivalent classifications |
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| UIC class | 2C1 (refined to 2′C′1′ or 2′C1′) |
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| French class | 231 |
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| Turkish class | 36 |
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| Swiss class | 3/6 |
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| Russian class | 2-3-1 |
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|
| First known tank engine version |
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| First use | 1896 |
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| Country | Australia |
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| Locomotive | Q class |
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| Railway | Western Australian Government Railways |
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|
| First known tender engine version |
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| First use | 1887 |
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| Country | United States of America |
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| Railway | Lehigh Valley Railroad |
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| Evolved from | 4-6-0 |
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| Evolved to | 4-6-4 |
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| Benefits | Larger firebox than the 4-6-0 |
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| Drawbacks | Required piloting (also known as double heading) when train lengths increased |
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|
| First known "True type" version |
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| First use | 1901 |
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| Country | New Zealand |
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| Locomotive | Q class |
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| Railway | New Zealand Railways Department |
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| Designer | Alfred Beattie |
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| Builder | Baldwin Locomotive Works |
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| Evolved from | 4-4-2, 4-6-0 & 2-6-2 |
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| Evolved to | 4-6-4, 4-8-2 |
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| Benefits | Wide and deep firebox behind coupled wheels |
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|
Under the Whyte notation for the classification of steam locomotives, 4-6-2 represents the wheel arrangement of four leading wheels on two axles, six powered and coupled driving wheels on three axles and two trailing wheels on one axle. The 4-6-2 locomotive became almost globally known as a Pacific type after a locomotive built by the Baldwin Locomotive Works in Philadelphia was shipped across the Pacific Ocean to New Zealand.[1][2]
- ^ PRC Rail Consulting Ltd. "Steam Glossary". The Railway Technical Website | PRC Rail Consulting Ltd.
- ^ Holland, D.F. (1971). Steam Locomotives of the South African Railways. Vol. 1: 1859–1910 (1st ed.). Newton Abbott, England: David & Charles. pp. 69–77, 88–89, 101–103, 128–130, 137–139. ISBN 978-0-7153-5382-0.