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  2. Union Pacific Big Boy - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_Big_Boy

    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 haul freight over the Wasatch Range between Ogden, Utah, and Green ...

  3. Union Pacific 4014 - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_4014

    Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet.Built in November 1941 by American Locomotive Company (ALCO) in Schenectady, New York, it was assigned to haul heavy freight trains in the Wasatch mountain range.

  4. Union Pacific 4023 - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_4023

    Union Pacific 4023 is a 4000 class 4-8-8-4 "Big Boy" type steam locomotive, preserved at Kenefick Park in South Omaha, Nebraska.Built in November 1944 by the American Locomotive Company's Schenectady 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 ...

  5. The Legendary Big Boy 4014 Train Just Rescued a Stuck ... - AOL

    www.aol.com/legendary-big-boy-4014-train...

    The restored steam engine from 1941 pulled into action after a call for help. The Legendary Big Boy 4014 Train Just Rescued a Stuck Freighter Skip to main content

  6. 4-8-8-4 - Wikipedia

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

    A similar wheel arrangement exists for Garratt locomotives, but is referred to as 4-8-0+0-8-4 since both engine units swivel. 4-8-8-4 Big Boys were only produced for the Union Pacific Railroad. Twenty-five such engines were built between 1941 and 1944, numbered 4000 to 4024.

  7. Union Pacific Challenger - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_Challenger

    Hauling a 3,600-short-ton (3,300 t; 3,200-long-ton) freight train demanded double heading and helper operations, and adding and removing helper engines slowed operations. Those limitations prompted the introduction of the Big Boy in 1941, as well as a redesign of the last three orders from 1942 to 1944.

  8. List of most powerful locomotives - Wikipedia

    en.wikipedia.org/wiki/List_of_most_powerful...

    3,600 kilowatts (4,828 hp) engine (Maxima 40CC) [21] Voith Maxima 40CC is the most powerful single-engine diesel-hydraulic locomotive ever built. XA Triplex: Virginian Railway: 700 Baldwin: 1916 Steam 2-8-8-8-4: 532 tonnes (586 short tons) 741 kilonewtons (166,600 lbf) compound — Rebuilt into separate locomotives; Maximum speed approx. 10 mph ...

  9. Union Pacific 4012 - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_4012

    Union Pacific 4012 is a 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive, one of eight preserved Union Pacific Big Boy locomotives. Built in November 1941 by the American Locomotive Company (ALCO) at its Schenectady Locomotive Works of Schenectady, New York, No. 4012 was retired in 1962 and donated to Steamtown, U.S.A, in Bellows Falls, Vermont, and later moved to Steamtown National ...

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