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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.

AttributesValues
rdf:type
rdfs:label
  • 4-4-4-4 (en)
  • Locomotiva 4-4-4-4 (pt)
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)
name
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/WheelArrangement_4-4-4-4.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Baltimore_and_Ohio_Duplex.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Baltimore_and_Ohio_Duplex_detail.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Pennsylvania_Railroad_TR1.jpg
dcterms:subject
Wikipage page ID
Wikipage revision ID
Link from a Wikipage to another Wikipage
sameAs
dbp:wikiPageUsesTemplate
thumbnail
alt
  • Diagram of one small leading wheel, and four large driving wheels joined by a coupling rod (en)
builder
caption
  • Front of locomotive at left (en)
  • The Baltimore & Ohio Railroad's #5600 George H. Emerson. (en)
country
date
  • May 1937 (en)
  • April 1942 (en)
designer
  • Raymond Loewy
  • Baltimore and Ohio Railroad (en)
  • Ralph P. Johnson (en)
evolvedfrom
French/Spanish
image
  • Image:Baltimore and Ohio Duplex.jpg (en)
locomotive
mainbenefit
  • Better high speed performance (en)
  • Decreased wheelbase (en)
maindrawback
  • Wheel slip
  • Premature cylinder wear, cylinder clogging and restricted firebox size (en)
railway
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