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0-8-4T

Tank locomotive wheel arrangement

Tank locomotive wheel arrangement

Under the Whyte notation for the classification of steam locomotives, 0-8-4 represents the wheel arrangement of no leading wheels, eight powered and coupled driving wheels on four axles, and four trailing wheels on two axles (usually in a trailing bogie).

Equivalent classifications

Other equivalent classifications are:

  • UIC classification: '''D2, D2'''' (also known as German classification and Italian classification)
  • French classification: 042
  • Turkish classification: 46
  • Swiss classification: 4/6

Examples

All examples of this wheel arrangement were tank locomotives; there are no 0-8-4 tender locomotives recorded.

India

Barsi Light Railway A class 0-8-4T

The Barsi Light Railway had Kitson & Company build five A Class/"Hamilton Class" tank engines of this wheel arrangement to the design of famed engineer Everard Calthrop for running on their line in 1896.{{Cite book

United Kingdom

Two separate classes were built in the UK, by two different railway companies. Both of these had their origins with an 0-8-0 tender design. Both classes were designed as powerful, but slow-speed, locomotives for heavy shunting. They did not require high speed or long range, so had no need for a leading truck or the greater coal capacity of a tender. Other than this though, they were quite distinct.

The first example was the Great Central Railway Class 8H of 1907.{{Cite book |author-link=H. C. Casserley |orig-year=1955 |author-link=E.L. Ahrons

The class was considered a success, although highly specialised, and developments were rebuilt and built new by the LNER. The rebuilt locomotive trialled a new outside-framed bogie, fitted with a booster engine, the LNER being one of the few UK railways to favour these.{{cite web |access-date=2011-01-19 |archive-date=2011-04-15 |archive-url=https://web.archive.org/web/20110415062511/http://www.lner.info/locos/S/s1.shtml |url-status=live

The second example was LNWR 380 Class. These were a simple stretched version of the inside-cylindered 0-8-2T 1185 Class, which had been derived from the LNWR's numerous 0-8-0 freight locomotives, with a larger coal bunker. The class was intended for both shunting, banking and as mineral engines for the heavy coal or iron train use in the South Wales coalfield. The enlarged bunker made them more suitable for these longer workings. Thirty were built.

References

References

  1. [[#Ahrons, British Steam Railway Locomotive. Ahrons, British Steam Railway Locomotive]], pp. 337—340
  2. [[#Casserley & Asher, Locomotives of British Railways. Casserley & Asher, Locomotives of British Railways]], pp. 70, '''319'''
  3. [[#Ahrons, British Steam Railway Locomotive. Ahrons, British Steam Railway Locomotive]], pp. 360, 364, '''370'''
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