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  2. List of most powerful locomotives - Wikipedia

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

    Largest non-articulated steam locomotive, and the only seven-axle non-articulated steam locomotive ever built. AD60 class: New South Wales Government Railways: 6001-6042 Beyer, Peacock & Company: 1952–1954, 1956 Steam 4-8-4+4-8-4: 255 tonnes (281 short tons) 265 kilonewtons (59,575 lbf) 4,422 kilowatts (5,930 hp)

  3. Union Pacific Big Boy - Wikipedia

    en.wikipedia.org/wiki/Union_Pacific_Big_Boy

    There was some speculation that the first series of Chesapeake and Ohio 2-6-6-6 H-8 “Allegheny” locomotives, built by the Lima Locomotive Works in 1941, may have weighed as much as 778,200 lb (353,000 kg), exceeding the Big Boys, but subsequent re-weighs of early-production H-8s, under close scrutiny by the builder and the railroad, found ...

  4. EMD DDA40X - Wikipedia

    en.wikipedia.org/wiki/EMD_DDA40X

    The EMD DDA40X is a 6,600 hp (4,943 kW) D-D locomotive, built by EMD from 1969 to 1971 exclusively for the Union Pacific Railroad. [1] It is the most powerful diesel–electric locomotive model ever built on a single frame, having two 16-645E3A diesel prime movers. [2]

  5. See ‘Big Boy,’ world’s largest steam locomotive, during stop ...

    www.aol.com/see-big-boy-world-largest-100000405.html

    The 1.2 million-pound, 132-foot long engine is the largest operating steam locomotive in the world. The engine, which was first put into service in 1941, is nearing the end of a 10-state tour.

  6. Union Pacific’s No. 4014 steam locomotive is a massive 132-foot long engine that has been touring the rails of middle America since August. See ‘Big Boy,’ world’s largest steam locomotive ...

  7. Hundreds gathered to see the world’s largest operating steam locomotive. ... Oct. 11, 2024. ‘Big Boy’ was built in 1941, one of only 25 ever built.

  8. 2-8-8-4 - Wikipedia

    en.wikipedia.org/wiki/2-8-8-4

    The Northern Pacific Railway was the first railroad to order a 2-8-8-4. The first was built in 1928 by American Locomotive Company; at the time, it was the largest locomotive ever built. It had the largest firebox ever applied to a steam locomotive, some 182 square feet (16.9 m 2) in area, to burn Rosebud coal, a cheap low-quality coal. But the ...

  9. Pennsylvania Railroad class S1 - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_Railroad_class_S1

    At 140 ft 2 + 1 ⁄ 2 in (42.74 m) overall, engine and tender, the S1 was the longest reciprocating steam locomotive ever; it also had the heaviest tender (451,840 lb / 205 tonnes), highest tractive effort (76,403 lbf (339.86 kN)) of a passenger steam engine when built and the largest driving wheels (7 feet in diameter) ever used on a ...