From Surf Wiki (app.surf) — the open knowledge base

2-4-0+0-4-2

Locomotive wheel arrangement

Field	Value
name	2-4-0+0-4-2
image	WheelArrangement 2-4-4-2.svg
alt	Diagram of one small leading wheel, four large driving wheels in two pairs, each pair joined by coupling rods, and one small trailing wheel
UIC/Germany/Italy	1B+B1, 1’B+B1’
French/Spanish	120+021
Turkish	23+23
Swiss	2/3+2/3, 4/6 from the 1920s
Russian	1-2-0+0-2-1
date	1915
country	Brazil
locomotive	Q class
railway	São Paulo Railway
designer	Beyer, Peacock and Company
builder	Beyer, Peacock and Company
evolvedfrom	[0-4-0+0-4-0](0-4-0-0-4-0)

| UIC/Germany/Italy= 1B+B1, 1’B+B1’ | French/Spanish = 120+021

Under the Whyte notation for the classification of steam locomotives by wheel arrangement, 2-4-0+0-4-2 is an articulated locomotive, usually of the Garratt type. The wheel arrangement is effectively two 2-4-0 locomotives operating back to back, with the boiler and cab suspended between the two power units. Each power unit has two leading wheels on one axle, four powered and coupled driving wheels on two axles and no trailing wheels. A similar wheel arrangement exists for Mallet locomotives, but is referred to as 2-4-4-2 since only the front engine unit can pivot.

History

This was the second rarest Garratt wheel arrangement. Only five locomotives were constructed to this arrangement, four of which were built by Beyer, Peacock and Company (BP).

The four BP locomotives comprised three for the São Paulo Railway of Brazil in 1915, and one for the gauge Ceylon Government Railway (CGR) in 1929, the CGR's class H1.

One more was built in 1919 by the São Paulo Railway, for its own use on .

Manufacturers

Railway	Class	Works no.	Units	Year	Builder
Ceylon Government Railway	H1	6629	1	1929	Beyer, Peacock
São Paulo Railway, Brazil			1	1919	São Paulo Railway
São Paulo Railway, Brazil	Q	5892-5894	3	1915	Beyer, Peacock

Usage

Brazil

Ceylon

The single class H1 Garratt entered service on the Ceylon Government Railways in 1931. It was used in mixed traffic working on the Uda Pussellawa railway. Until the 1960s, the locomotive was occasionally operated on the Kelani Valley Line. It was withdrawn from service in 1972 and was scrapped in 1981.

References

{{Garratt Builders B
{{Garratt Builders O
"Rail 2000". Sri Lanka Railway.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

2-4-0+0-4-2-locomotives 1b+b1-locomotives garratt-locomotives whyte-notation

Want to explore this topic further?

Ask Mako anything about 2-4-0+0-4-2 — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report