Under

Whyte notation Whyte notation is a classification method for steam locomotives, and some internal combustion locomotives and electric locomotives, by wheel arrangement. It was devised by Frederick Methvan Whyte, and came into use in the early twentieth cen ...

for the classification of steam locomotives, 2-2-0 represents the

wheel arrangement In rail transport, a wheel arrangement or wheel configuration is a system of classifying the way in which wheels are distributed under a locomotive. Several notations exist to describe the wheel assemblies of a locomotive by type, position, and c ...

of two

leading wheel The leading wheel or leading axle or pilot wheel of a steam locomotive is an unpowered wheel or axle located in front of the driving wheels. The axle or axles of the leading wheels are normally located on a leading truck. Leading wheels are used ...

s on one axle, two powered driving wheels on one axle, and no

trailing wheel On a steam locomotive, a trailing wheel or trailing axle is generally an unpowered wheel or axle ( wheelset) located behind the driving wheels. The axle of the trailing wheels is usually located in a trailing truck. On some large locomotives, ...

s. This configuration, which became very popular during the 1830s, was commonly called the Planet type after the first locomotive,

Robert Stephenson Robert Stephenson FRS HFRSE FRSA DCL (16 October 1803 – 12 October 1859) was an English civil engineer and designer of locomotives. The only son of George Stephenson, the "Father of Railways", he built on the achievements of his father ...

's '' Planet'' of 1830.

Equivalent classifications

Other equivalent classifications are: * UIC classification: 1A (also known as German classification and

Italian classification The UIC classification of locomotive axle arrangements, sometimes known as the German classification''The Railway Data File''. Leicester: Silverdale, 2000. p. 52. . or German system,Kalla-Bishop P.M. & Greggio, Luciano, ''Steam Locomotives'', Cre ...

) *

French classification Under the French classification system for locomotive wheel arrangements, the system is slightly different for steam and electric/diesel vehicles. Steam The French system counts axles, rather than wheels. As with Whyte notation, a conventional r ...

: 110 *

Turkish classification In the Turkish classification system for railway locomotives, the number of powered axles are followed by the total number of axles. It is identical to the Swiss system except that the latter places a slash between the two numbers. Thus 0-6-0 beco ...

: 12 *

Swiss classification For more than a century, the Swiss locomotive, multiple unit, motor coach and railcar classification system, in either its original or updated forms, has been used to name and classify the rolling stock operated on the railways of Switzerland. ...

: 1/2

History

Great Britain

After early experience with the 0-2-2 configuration on the

Liverpool and Manchester Railway The Liverpool and Manchester Railway (L&MR) was the first inter-city railway in the world. It opened on 15 September 1830 between the Lancashire towns of Liverpool and Manchester in England. It was also the first railway to rely exclusively ...

decided to build a locomotive with cylinders inside the frames, for which a 2-2-0 was preferable. The first such locomotive was ''Planet'', built in 1830 and the company went on to build a further eighteen examples for the railway. In 1835 five examples were supplied to the

London and Greenwich Railway The London and Greenwich Railway (L&GR) was opened in London between 1836 and 1838. It was the first steam railway in the capital, the first to be built specifically for passengers, and the first entirely elevated railway. Origins The idea for t ...

. After 1836 Edward Bury built sixty-nine

bar frame A locomotive frame is the structure that forms the backbone of the railway locomotive, giving it strength and supporting the superstructure elements such as a cab, boiler or bodywork. The vast majority of locomotives have had a frame structure o ...

2-2-0 locomotives for the

London and Birmingham Railway The London and Birmingham Railway (L&BR) was a railway company in the United Kingdom, in operation from 1833 to 1846, when it became part of the London and North Western Railway (L&NWR). The railway line which the company opened in 1838, betw ...

. The steam roller and traction engine company

Aveling and Porter Aveling and Porter was a British agricultural engine and steamroller (road roller) manufacturer. Thomas Aveling and Richard Thomas Porter entered into partnership in 1862, and developed a steam engine three years later in 1865. By the ear ...

built a number of 2-2-0 locomotives, some of which were convertible traction engines.

North America

Tom Thumb Tom Thumb is a character of English folklore. ''The History of Tom Thumb'' was published in 1621 and was the first fairy tale printed in English. Tom is no bigger than his father's thumb, and his adventures include being swallowed by a cow, tan ...

, the first American-built steam locomotive used on a common-carrier railroad, built by Peter Cooper in 1830 was a belt-driven 2-2-0, but the type was not perpetuated.

Ireland

The Dublin and Kingstown Railway used 2-2-0 in 1834 including ''

Hibernia ''Hibernia'' () is the Classical Latin name for Ireland. The name ''Hibernia'' was taken from Greek geographical accounts. During his exploration of northwest Europe (c. 320 BC), Pytheas of Massalia called the island ''Iérnē'' (written ). ...

'' designed by Richard Roberts and built by Sharp, Roberts and Company, and ''Vauxhall'' built

George Forrester and Company George Forrester and Company was a British marine engine and locomotive manufacturer at Vauxhall Foundry in Liverpool, established by Scottish engineer George Forrester (b. 1780/81). The company opened in 1827 as iron founders and commenced buil ...

Russia

The first Russian-built steam locomotive was a 2-2-0 built by the Cherepanovs (father and son) in 1833-1834.

Decline of the 2-2-0

By 1840 the 2-2-0 tender type had largely been superseded by the

2-2-2 Under the Whyte notation for the classification of steam locomotives, 2-2-2 represents the wheel arrangement of two leading wheels on one axle, two powered driving wheels on one axle, and two trailing wheels on one axle. The wheel arrangement bo ...

configuration. However, there are a few examples of later tank engines, thus

William Bridges Adams William Bridges Adams (1797 – 23 July 1872) was an English author, inventor and locomotive engineer. He is best known for his patented Adams axle – a successful radial axle design in use on railways in Britain until the end of steam trac ...

of the Fairfield Locomotive Works () in Bow supplied a 2-2-0

well tank A tank locomotive or tank engine is a steam locomotive that carries its water in one or more on-board water tanks, instead of a more traditional tender. Most tank engines also have bunkers (or fuel tanks) to hold fuel; in a tender-tank locomo ...

to the Roman Railway in 1850.Hamilton Ellis, ''The pictorial history of railways,'' Hamlyn, 1968, p.58. Also Dugald Drummond of the

London and South Western Railway The London and South Western Railway (LSWR, sometimes written L&SWR) was a railway company in England from 1838 to 1922. Originating as the London and Southampton Railway, its network extended to Dorchester and Weymouth, to Salisbury, Exeter ...

introduced his C14 class 2-2-0T in 1906, for Auto trains, but this design was not successful and several of the locomotives were rebuilt to 0-4-0.

References

{{Whyte types 2-2-0 locomotives 1830 in rail transport 2,2-2-0