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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 ...
The Big Boy was articulated like the Mallet locomotive design, although without compounding. [7] It was designed for stability at 80 miles per hour (130 km/h), allowing for a wide margin of reliability and safety, as steam locomotives normally operated well below that speed in freight service. [8]
Union Pacific No. 4014, better known as "Big Boy," kicked off its 2024 tour on Aug. 28 in Cheyenne, Wyoming, and will work its way across nine states, including Oklahoma this weekend.
150 tonnes (165 short tons) — 12,874 horsepower (9,600 kW) One of the most powerful single-frame locomotives currently [when?] in series production. China Railways HXD1C: China Railway: HXD1C0001-HXD1C0990 CSR Zhuzhou Electric Locomotive, Siemens 2009– Electric Co'Co' 150 tonnes (165 short tons) 128,141 pounds-force (570 kN) starting
Union Pacific’s Big Boy, a 1.2 million-pound locomotive put into service in 1941, rolls into Kansas City on Tuesday, Oct. 15, 2024. Only 25 of this kind of train were built and this is the last ...
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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A Big Boy locomotive.This example is Union Pacific 4014. 4-8-8-4 wheel arrangement. 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.