A 4-4-4-4 steam locomotive, in the Whyte notation for describing locomotive wheel arrangements, has a four-wheel leading truck, two sets of four driving wheels, and a four-wheel trailing truck. While it would be possible to make an articulated locomotive of this arrangement, the only 4-4-4-4s ever built were duplex locomotives—with two sets of cylinders driving two sets of driven wheels in one rigid frame, essentially a 4-8-4 with divided drive.
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rdf:type
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rdfs:label
| - 4-4-4-4 (en)
- Locomotiva 4-4-4-4 (pt)
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rdfs:comment
| - A 4-4-4-4 steam locomotive, in the Whyte notation for describing locomotive wheel arrangements, has a four-wheel leading truck, two sets of four driving wheels, and a four-wheel trailing truck. While it would be possible to make an articulated locomotive of this arrangement, the only 4-4-4-4s ever built were duplex locomotives—with two sets of cylinders driving two sets of driven wheels in one rigid frame, essentially a 4-8-4 with divided drive. (en)
- Um arranjo 4-4-4-4 na Classificação Whyte para locomotivas a vapor é da seguinte maneira configurada: quatro rodeiros líderes em um truque seguido por dois truques de rodeiros motrizes e mais um truque de rodeiros não tracionados. Outras classificações equivalentes: Classificação UIC: 2BB2 (também na Classificação Alemã e na Classificação Italiana): 2222: 2424Classificação Suíça: 2/4+2/4 até meados de 1920, depois 4/8 (pt)
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alt
| - Diagram of one small leading wheel, and four large driving wheels joined by a coupling rod (en)
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builder
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caption
| - Front of locomotive at left (en)
- The Baltimore & Ohio Railroad's #5600 George H. Emerson. (en)
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country
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date
| - May 1937 (en)
- April 1942 (en)
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designer
| - Raymond Loewy
- Baltimore and Ohio Railroad (en)
- Ralph P. Johnson (en)
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French/Spanish
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image
| - Image:Baltimore and Ohio Duplex.jpg (en)
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locomotive
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mainbenefit
| - Better high speed performance (en)
- Decreased wheelbase (en)
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maindrawback
| - Wheel slip
- Premature cylinder wear, cylinder clogging and restricted firebox size (en)
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railway
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