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The UIC classification of locomotive axle arrangements, sometimes known as the German classification[1] or German system, [2][3] describes the wheel arrangement of locomotives, multiple units and trams. It is used in much of the world, notable exceptions being the United Kingdom and North America [a]. The classification system is managed by the ...
For the classifications of goods wagons and railway coaches, see UIC classification of goods wagons and UIC classification of railway coaches. The UIC classification of locomotive axle arrangements , sometimes known as the German classification [1] or German system , [2] [3] describes the wheel arrangement of locomotives , multiple units and trams .
A Mallet locomotive is a type of compound articulated steam locomotive, invented by the Swiss engineer Anatole Mallet (1837–1919). The front of the locomotive is articulated on a bogie. The compound steam system fed steam at boiler pressure to high-pressure cylinders driving the rear set of driving wheels (rigidly connected to the boiler).
UIC classification: 1CD (also known as German classification and Italian classification) French classification: 130+040 Turkish classification: 34+44 Swiss classification: 3/4+4/4. The UIC classification is refined to (1'C)D for Mallet locomotives.
Mallet locomotives can be indicated by bracketing the front power unit — for example, the Union Pacific Big Boy, 4-8-8-4 in Whyte notation, is (2′D)D2′ in UIC notation. Garratt -type locomotives are indicated by bracketing or placing plus signs between all individual units.
Mallet locomotives are indicated by bracketing the front power unit - for example, the Union Pacific Big Boy - denoted 4-8-8-4 in Whyte notation, is designated (2'D)D2' in UIC notation. Garrett-type locomotives are indicated by bracketing all individual units. On many electric and diesel-electric locomotives, axles are individual driven by ...
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The equivalent UIC classification is refined to (1′E)E1′ for Mallet locomotives. All 2-10-10-2 locomotives have been articulated locomotives of the Mallet type. This wheel arrangement was rare. Only two classes of 2-10-10-2 locomotives have been built: the Atchison, Topeka and Santa Fe Railway 's 3000 class, and the Virginian Railway 's ...
