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  2. Union Pacific Big Boy - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_Big_Boy

    Cost to build US$ 265,000 in 1941, equivalent to $5,489,457 in 2023. The Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until 1962. The 25 Big Boy locomotives were built to ...

  3. Union Pacific 844 - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_844

    Union Pacific 844 is a class "FEF-3" 4-8-4 "Northern" type steam locomotive owned and operated by the Union Pacific Railroad for its heritage fleet.Built in December 1944 by the American Locomotive Company (ALCO) of Schenectady, New York, No. 844 is one of four surviving FEF series locomotives and the only one in operation.

  4. Union Pacific FEF series - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_FEF_series

    Factor of adh. The Union Pacific FEF series consists of 45 4-8-4 "Northern" steam locomotives built by the American Locomotive Company (ALCO) between 1937 and 1944 and operated by the Union Pacific Railroad until 1959. Like other Union Pacific steam classes, the acronym comes from the first letter of the spelling of its wheel arrangement: Four ...

  5. 4-8-8-4 - Wikipedia

    en.wikipedia.org/wiki/4-8-8-4

    A 4-8-8-4 in the Whyte notation for the classification of steam locomotives by wheel arrangement, is a locomotive with a four-wheel leading truck, two sets of eight driving wheels, and a four-wheel trailing truck. Only one model of locomotives has ever used this wheel configuration, and that is commonly known as "Union Pacific Big Boys" after ...

  6. 4-8-4 - Wikipedia

    en.wikipedia.org/wiki/4-8-4

    Union Pacific 844, the only steam locomotive never retired by a North American Class I railroad. The 4-8-4 wheel arrangement was a progression from the 4-8-2 Mountain type and, like the 2-8-4 Berkshire and 4-6-4 Hudson types, an example of the "Super Power" concept in steam locomotive design that made use of the larger firebox that could be supported by a four-wheel trailing truck, which ...

  7. Union Pacific 4012 - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_4012

    Union Pacific 4012, nicknamed "Big Boy", is a 4-8-8-4 type locomotive built by American Locomotive Company in November 1941. It is among the world's largest steam locomotives. One of 25 built, No. 4012 is one of eight of its type to survive the advent of the diesel era. Referred to as an "articulated" locomotive, because it has more than one ...

  8. It will depart on Sunday for McAlester, Oklahoma. Union Pacific Railroad’s Big Boy No. 4014 stops at Fort Worth’s T&P Station during its Heartland of America Tour on Friday, Oct. 11, 2024 ...

  9. Union Pacific 4023 - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_4023

    Union Pacific 4023 is a 4-8-8-4 Big Boy steam locomotive preserved at Kenefick Park in South Omaha, Nebraska.Built in 1944 by the American Locomotive Company at its Schenectady Locomotive Works, No. 4023 is one of eight surviving Big Boys and the only one that is part of the class' second group built in 1944, as all seven of the other survivors were part of the first group built in 1941.

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