2-4-4-0

{{short description|Steam locomotive wheel arrangement}} {{More citations needed|date=September 2025}} [[File:SBB Historic - 041 - 2 2 2 3 gekuppelte 4 Zylinder-Compound-Tender-Lokomotive für die Rhätische Bahn (crop).jpg|thumb|A Swiss [[narrow gauge railway|narrow gauge]] [[Rhaetian Railway G 2/3+2/2|G 2/3+2/2]] locomotive<ref>{{Cite book |title=Engines That Bend: Narrow Gauge Articulated Locomotives |first=David |last=Joy |isbn=978-1-902827-23-0 |publisher=Atlantic Publishers |year=2012 |chapter=2: Mallet dominance |page=34 }}</ref> of the [[RhB|Rhaetian Railway]] in 1902]] In the [[Whyte notation]] for the classification of [[steam locomotive]] [[wheel arrangement]], a '''2-4-4-0''' is a locomotive with two [[leading wheel]]s, two sets of four [[driving wheel]]s, and no [[trailing wheel]]s. Examples of this type were constructed as [[Mallet locomotive|Mallet]] locomotives.

==Examples== [[File:BASA-3K-7-519-3-Steam_locomotive_of_BD%C5%BD.jpg|thumb|Bulgarian State Railways class 29.01]]

Bulgaria had one example of its class 29.01, built as No. 68 in 1908 and nicknamed "Баба Клементина“ (Grandma Clementina). It was unsuccessful, though it was kept on until 1950 in storage. It is unique for being one of Bulgaria's only [[mallet locomotive]]s, and the only one with eight driving wheels.

The Chemins de Fer Departmentaux Vivarais and the Chemins de Fer Departmentaux Lozère each possessed 2-4-4-0 Mallet locomotives. The [[Société Alsacienne de Constructions Mécaniques]] built three for the Vivarais system in 1908 and two for the Lozère system in 1909.<ref name=SFNG>{{cite book | first =John | last =Organ | year =2000 | title =Southern France Narrow Gauge | chapter=Chapter 3, p3 (unnumbered) | publisher =Middleton Press | location =Midhurst |isbn=1-901706-47-8 }}</ref> [[File:Parovoz I.jpg|thumb|Russian "Class І"]] Russian "Class І" ([[:de:Russische Baureihe І]], German Wikipedia) were rare examples of Mallets designed for passenger service. More than 100 were built between 1903 and 1909, and the last were in use until the 1950s.

==Equivalent classifications== Other equivalent classifications are: *[[UIC classification]]: '''1BB''' (also known as German classification and [[Italian classification]]) *[[French classification]]: '''120+020''' *[[Turkish classification]]: '''23+22''' *[[Swiss classification]]: '''2/3+2/2''' *[[Russian classification]]: '''1-2-0+0-2-0'''

The [[UIC classification]] is '''1B'B'''.

==References== {{reflist}}

[[Category:2-4-4-0 locomotives| ]] [[Category:Whyte notation|44,2-4-4-0]]