World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0031363017
Reproduction Date:

Title: 4-2-2-0  
Author: World Heritage Encyclopedia
Language: English
Subject: 2-2-2-0, Divided drive (locomotive), 0-2-4, 2-2-4-0, 4-4-6
Publisher: World Heritage Encyclopedia


Under the Whyte notation for the classification of steam locomotives, 4-2-2-0 represents the wheel arrangement of four leading wheels on two axles, four powered but uncoupled driving wheels on two axles, and no trailing wheels. The arrangement became known as double single.


This very unusual wheel arrangement was used by Dugald Drummond of the London and South Western Railway between 1897 and 1901 on two classes of divided drive locomotives, the T7 and E10 classes. The absence of coupling rods enabled the driving wheels to be more widely spaced than on a 4-4-0 locomotive and permitted the inclusion of a larger firebox[1] Seven locomotives of the type were built which performed adequately, but also displayed disadvantages over a 4-4-0 and so the type was not perpetuated.


  1. ^ D.L. Bradley, Locomotives of the London and South Western Railway, Part 2., Railway Correspondence and Travel Society, 1967), p.77.
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.