Rolling Stock, In the late 1940s, they were reassigned to Cheyenne, Wyoming, where they hauled freight over Sherman Hill to Laramie, Wyoming. Today, however, we’ll be ranking the 10 largest steam locomotives ever built according to their weights in order to see how they compare. While the PRR’s static test plant verified 7,987 horsepower after testing, some people argue that the impressive PRR Q2 actually reached a full 8,000 horsepower and was the most powerful locomotive to ever have been static tested.

The Big Boy locomotives had large grates to burn the low-quality bituminous coal supplied by Union Pacific-owned mines in Wyoming. The American Locomotive Company manufactured 25 Big Boy locomotives for Union Pacific; a group of 20 in 1941 and one group of five in 1944. This stunning level of power was necessary for this locomotive class to complete its job climbing the Allegheny Mountains’ steep grades. [16], Class of 25 American simple articulated 4-8-8-4 locomotives. Train & Track, Complete 14" RR: 2 Learn how and when to remove this template message, "Railway Age, October 4, 1941: UP's "Big Boy" debuts", "Huge Big Boy steam locomotive coming back to life", "Refurbished 'Big Boy' locomotive weighs more than a Boeing 747", "Marklin 37994 Union Pacific "Big Boy" Steam Loco", "The Big Boy leaves the shop and heads into history", "UP steam crew has Big Boy ready to roll", "World's largest locomotive coming to West Chicago to celebrate 150th anniversary of Transcontinental Railroad completion", "DISASTER ON THE RAILS: The Wreck of the 4005", "Big Boy Derailed On Way To Laramie, Back On Schedule", "Cheyenne's Big Boy 4004 to shine in new paint July 9", "The Forney Museum is worth getting around to", https://www.nps.gov/stea/learn/news/steamtown-national-historic-site-s-union-pacific-big-boy-no-4012-removed-from-public-display-for-cosmetic-restoration-and-painting.htm, National Railroad Museum, Green Bay, Wisconsin, "Big Boy Steam Locomotive Arrives at its New Home in Frisco", Museum of American Railroad, Frisco, Texas, https://en.wikipedia.org/w/index.php?title=Union_Pacific_Big_Boy&oldid=981451447, Standard gauge locomotives of the United States, Short description is different from Wikidata, Articles needing additional references from October 2013, All articles needing additional references, All articles with vague or ambiguous time, Vague or ambiguous time from November 2019, Creative Commons Attribution-ShareAlike License, Type E (Nos. Although the Norfolk & Western Y-Class isn’t the largest steam locomotive, it was the strongest in the world while it was up and running. Meet the Union Pacific Big Boy, a steam locomotive built to handle extremely heavy freight through the treacherous grades of the Wasatch Mountains. The Yellowstone was the largest steam locomotive ever built. Only one experimental XA Triplex was made for the Virginian Railway, and it’s unclear whether the railway actually wound up purchasing the locomotive from Baldwin. Engines Hudson Project, 7.25" ga. Elec. Wagner Locos, Cars, Track, More, 7.5 / 2.5" scale Rio & Riding Car, Accucraft AL97-083A Canadian Royal Hudson, 7.5" As an experiment, No.

With a 14-wheel build and the capacity to carry 25,000 gallons of water, the Union Pacific Challenger easily topped a million pounds in weight. e-Magazine |

Peak horsepower was reached at about 41 mph (66 km/h). Steam-powered locomotives were the first type of locomotives built, ushering in a new industrialized era with promises of more efficient cargo hauling and passenger travel. No. It retired from regular rail service back in 1959, but Norfolk & Western kept its steam locomotives highly active until the 1960’s. the latest update of this page, 4.75" ga. Compounding, booster, and feed water heaters were eliminated, as were Baker valve gear and limited cut-off. 4014 partially derailed, with two axles from one set of drive wheels falling into the gauge, while entering the yard at, This page was last edited on 2 October 2020, at 11:41. [4][9] Along with the Challengers, the Big Boys arrived on the scene just as traffic was surging in preparation for American participation in World War II. They traveled in a network radiating outwards from Roanoke, despite competition from the rising popularity of diesel engines trains. MaxiTrax Ruston & Cars, 7.5"/2.5" scale RGS 12" ga. MTC G-12 Train, Track, & Parts: 1" scale 4-3/4 ga. Southern Pacific SW1 Switcher: 7.5 ga/2.5" scale C-16 2-8-0 & Cars Reduced to $25,000 Relatively few Yellowstone locomotives were manufactured: only 72 in total, which were divided into five different classes. [2][3] For most of the route, the maximum grade is 0.82% in either direction, but the climb eastward from Ogden, into the Wasatch Range, reached 1.14%. There are plenty of different factors that can be taken into account while determining a locomotive’s overall “size,” including everything from length to traction effort and horsepower.

4014, and placed it in revenue service. The only Big Boy known to have been moved by highway. This locomotive was originally intended to be much lighter, but World War II resulted in light steel alloy restrictions alongside delaying the PRR S2’s construction schedule. [19] Unlike a similar effort with the Challengers, the conversion failed due to uneven heating in the Big Boy's large, single-burner firebox.

[4][5][9], The Big Boys were articulated, like the Mallet locomotive design, though lacking the compounding of the Mallet. [3][4] So Union Pacific decided to design a new locomotive that could handle the run by itself:[5] faster and more powerful than the compound 2-8-8-0s that UP tried after World War I, able to pull long trains at a sustained speed of 60 miles per hour (100 km/h) once past mountain grades. The Triplex certainly carried its share of design flaws, and was not reproduced as a result. It was designed by James Anderson for banking duties on the Lickey Incline in Worcestershire (south of Birmingham), England. Signals, Signs, Parts,  Hauling a 3,600-short-ton (3,300 t; 3,200-long-ton) freight train demanded double headingand helper operations, which slowed service. Few machines are as impressive as locomotives, with their sleek appearance and staggering hauling power. Since the resurrection of the Union Pacific Big Boy, it has reclaimed its title as the largest fully-operational steam locomotive in the world. Big Boy. Only two Union Pacific Challengers remain intact today, one of which is the impressive Union Pacific 3985. They were the only locomotives to use a 4-8-8-4 wheel arrangement: four-wheel leading truck for stability entering curves, two sets of eight driving wheels and a four-wheel trailing truck to support the large firebox. [7], To achieve these new engineering goals, the locomotive was "comprehensively redesigned from first principles," wrote locomotive historian Tom Morrison. Events Calendar | Book Store  But the "proliferation of valves and gauges on the backhead showed that running a Big Boy was an altogether more complicated and demanding task for the crew than running previous existing locomotives," Morrison wrote. [11], The Big Boy has the longest engine body of any reciprocating steam locomotive, longer than two buses. [8], The 4-8-8-4 class series, originally rumored to be called the "Wasatch", after the Wasatch Mountains, acquired its nickname after an unknown worker scrawled "Big Boy" in chalk on the front of No. The 25 Big Boy locomotives were built to haul freight over the Wasatch mountains between Ogden, Utah, and Green River, Wyoming. The sleek, Art Deco -style outer shell of the PRR S1 was designed by French-American industrial designer Raymond Loewy, whom you can see standing with his masterpiece in the photo. Union Pacific Railroad, Cheyenne, Wyoming, Moved to its current location from the museum's former location in. #20 & Tender, We have lots of buyers that This steam locomotive was built with a 2-8-8-8-2 wheel arrangement.

4020-4024), Seven on display and one (No. Their duties were assumed by diesel locomotives and gas turbine-electric locomotives. [4] Hauling a 3,600-short-ton (3,300 t; 3,200-long-ton) freight train demanded double heading and helper operations, which slowed service. So just how large can steam locomotives get?

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