How many Big Boy locomotives still exist?

Twenty-five Big Boys were built exclusively for Union Pacific Railroad, the first of which was delivered in 1941. Of the eight remaining Big Boys in existence, No. 4014 is the only one operating today. The Big Boys were about 133 feet long and weigh 1.2 million pounds.



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Twenty-five Big Boys were built exclusively for Union Pacific Railroad, the first of which was delivered in 1941. Of the eight remaining Big Boys in existence, No. 4014 is the only one operating today. The Big Boys were about 133 feet long and weigh 1.2 million pounds.

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Therefore I say it was and is the largest steam engine that was ever created... There was a machine called the Allegheny type which I think was a 4-6-6-6 which some believe was actually more powerfull and heavier than the Big Boy.

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Union Pacific 4014 is a steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet. It is a four-cylinder simple articulated 4-8-8-4 Big Boy type built in 1941 by the American Locomotive Company (ALCO) at its Schenectady Locomotive Works.

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The Big Boy has the longest engine body of any reciprocating steam locomotive, longer than two 40-foot buses. They were also the heaviest reciprocating steam locomotives ever built; the combined weight of the 772,250 lb (350,290 kg) engine and 436,500 lb (198,000 kg) tender outweighed a Boeing 747.

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The Big Boys were built for power. They did the work of three smaller engines, pulling 120-car, 3800 ton freight trains at forty miles per hour in the mountains of Utah and Wyoming. With power, though, comes weight - larger cylinders, pistons, drive rods, boiler and firebox.

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Its girth requires a 4-8-8-4 wheel configuration to keep it rock-steady on the rails. With a puny 7,000 horsepower, Big Boys had a maximum tractive power of 135,375 pounds, all to pull huge loads of freight across steep grades in Utah's Wasatch Mountains and the Rockies.

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Twenty of the Berkshire type locomotives exist today: 2 from the Pere Marquette, 6 from the Nickel Plate Road and 12 of the C & O's 2-8-4 locomotives, which they called Kanawhas. There are also a number of tenders that were used on Berkshire type locomotives that have survived.

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Old diesel locomotives have been scrapped and auctioned in the past after they had completed their codal life and were found uneconomical to operate. These locomotives were dismantled and auctioned piecemeal.

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The Union Pacific locomotive, known as Big Boy 4014, is the largest locomotive ever constructed. It just rolled in to Southern California after a massive restoration project. Thousands of people welcomed the largest steam locomotive ever constructed as it made its way back to Southern California Wednesday.

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On 3 July 1938, Mallard broke the world speed record for steam locomotives at 126 mph (203 km/h), which still stands today. Leading dia.

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Puffing Billy is the world's oldest surviving steam locomotive, constructed in 1813–1814 by colliery viewer William Hedley, enginewright Jonathan Forster and blacksmith Timothy Hackworth for Christopher Blackett, the owner of Wylam Colliery near Newcastle upon Tyne, in the United Kingdom.

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N&W, of course, didn't have to cover a profit to its Roanoke Shops). The 2-6-6-6 carried nearly as much weight on its trailer truck as the total engine weight of a Southern class Ks 2-8-0, and N&W's entire class M 4-8-0 weighed only about three tons more. So the Allegheny did, indeed, beat the A's horsepower figure.

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