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- In Whyte notation, a 4-6-6-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of six driving wheels and four trailing wheels. 4-6-6-4's are commonly known as Challengers. Other equivalent classifications are:UIC classification: 2CC2 (also known as German classification and Italian classification)French classification: 230+032Turkish classification: 35+35Swiss classification: 3/5+3/5 The UIC classification is refined to (2'C)C2' for Mallet locomotives. Challengers were most common in the Union Pacific Railroad, but many other railroads ordered them as well. An expansion for the Union Pacific Challenger class was the Union Pacific Big Boy class, being a 4-8-8-4, instead of a 4-6-6-4. Today, the only Challenger locomotives that survive were both owned by Union Pacific. One such locomotive, Union Pacific 3985, was operated by the Union Pacific Railroad in excursion service from 1981 to 2010, when mechanical problems took it out of service. It was retired in January 2020 due to its poor mechanical condition, though the Railroading Heritage of Midwest America now plans to restore the locomotive to operation. The second example, Union Pacific 3977 is on static display in Cody Park North Platte, Nebraska. Though originally intended for freight service, many units could be found leading passenger consists as well. Railroads that used the Challenger type locomotive include: (en)
- Als Lokomotiven der Bauart Challenger werden schwere Vierzylinder-Güterzugdampflokomotiven mit der Achsfolge (2’C)C2’ (amerikanische Schreibweise: 4-6-6-4), also mit einem führenden zweiachsigen Laufdrehgestell und drei Kuppelachsen (beide Achsgruppen in einem seitlich ausschwenkbaren Rahmen gelagert), drei weiteren, im Hauptrahmen gelagerten Kuppelachsen und schließlich einem zweiachsigen Schleppgestell bezeichnet. Lokomotiven dieser Bauart wurden nur in den USA eingesetzt. Wegen der einfachen Dampfdehnung entsprachen diese Lokomotiven trotz der äußeren Ähnlichkeit wie die meisten US-amerikanischen Gelenklokomotiven nicht der Bauart Mallet. (de)
- Les 4-6-6-4 (classification américaine Whyte), sont des locomotives à vapeur articulées comme les Mallet, mais à simple expansion. Les premières machines correspondant à cette nouvelle configuration et construites en 1936 pour l'Union Pacific furent dénommées « Challenger ». (fr)
- Тип 2-3-0+0-3-2 — паровоз, экипажная часть которого разделена на две части, передняя из которых включает в себя две бегунковых оси и три движущих (сцепных), а задняя — три движущих и две поддерживающих оси. Все построенные паровозы данного типа относились к сочленённым, у которых передняя группа располагалась на отдельной тележке, а задняя — на основной раме. По сравнению с типом позволяет лучше уравновесить тяжёлые паровозы по осям, снижая тем самым осевую нагрузку.Принятые формы условного обозначения:
* Американский — 4-6-6-4
* Французский — 230+032
* Советский — 2-3-0+0-3-2
* Германский — (2’C)C2' (ru)
- Uma locomotiva 4-6-6-4 é uma locomotiva articulada do tipo , que possui, de acordo com a Classificação Whyte para locomotivas a vapor, um arranjo de rodas com quatro rodas guia em dois eixo sem tração, seguidas de seis rodas motrizes em três eixos, articulados com mais seis rodas motrizes em três eixos e mais quatro eixos portantes posteriores. As locomotivas com arranjo 4-6-6-4, apelidadas "Challenger", foram desenvolvidas para a Union Pacific, que procurava locomotivas mais potentes que pudessem desafiar os trechos mais íngremes, particularmente na região da cordilheira Wasatch.. Inicialmente, as 4-6-6-4 foram desenvolvidas pela ALCO, a partir das , com o conjunto de 12 rodas dividido em dois e mais duas rodas portantes sendo acrescentadas na região posterior. A primeira 4-6-6-4 foi entregue à Union Pacific em agosto de 1936. Posteriormente a Baldwin também desenvolveu algumas locomotivas com esta configuração, que foram usadas por oito empresas, num total de 252 unidades construídas ao longo de 11 anos. (pt)
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- Als Lokomotiven der Bauart Challenger werden schwere Vierzylinder-Güterzugdampflokomotiven mit der Achsfolge (2’C)C2’ (amerikanische Schreibweise: 4-6-6-4), also mit einem führenden zweiachsigen Laufdrehgestell und drei Kuppelachsen (beide Achsgruppen in einem seitlich ausschwenkbaren Rahmen gelagert), drei weiteren, im Hauptrahmen gelagerten Kuppelachsen und schließlich einem zweiachsigen Schleppgestell bezeichnet. Lokomotiven dieser Bauart wurden nur in den USA eingesetzt. Wegen der einfachen Dampfdehnung entsprachen diese Lokomotiven trotz der äußeren Ähnlichkeit wie die meisten US-amerikanischen Gelenklokomotiven nicht der Bauart Mallet. (de)
- Les 4-6-6-4 (classification américaine Whyte), sont des locomotives à vapeur articulées comme les Mallet, mais à simple expansion. Les premières machines correspondant à cette nouvelle configuration et construites en 1936 pour l'Union Pacific furent dénommées « Challenger ». (fr)
- In Whyte notation, a 4-6-6-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of six driving wheels and four trailing wheels. 4-6-6-4's are commonly known as Challengers. Other equivalent classifications are:UIC classification: 2CC2 (also known as German classification and Italian classification)French classification: 230+032Turkish classification: 35+35Swiss classification: 3/5+3/5 The UIC classification is refined to (2'C)C2' for Mallet locomotives. (en)
- Uma locomotiva 4-6-6-4 é uma locomotiva articulada do tipo , que possui, de acordo com a Classificação Whyte para locomotivas a vapor, um arranjo de rodas com quatro rodas guia em dois eixo sem tração, seguidas de seis rodas motrizes em três eixos, articulados com mais seis rodas motrizes em três eixos e mais quatro eixos portantes posteriores. (pt)
- Тип 2-3-0+0-3-2 — паровоз, экипажная часть которого разделена на две части, передняя из которых включает в себя две бегунковых оси и три движущих (сцепных), а задняя — три движущих и две поддерживающих оси. Все построенные паровозы данного типа относились к сочленённым, у которых передняя группа располагалась на отдельной тележке, а задняя — на основной раме. По сравнению с типом позволяет лучше уравновесить тяжёлые паровозы по осям, снижая тем самым осевую нагрузку.Принятые формы условного обозначения: (ru)
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