Big Boy No.4014. Twenty-five Big Boys were built exclusively for Union Pacific Railroad, the first of which was delivered in 1941. The locomotives were 132 feet long and weighed 1.2 million pounds.
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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.
It is generally agreed that the largest steam locomotives are the 4-8-8-4 'Big Boys', built by the American Locomotive Company in 1941-44. They are 39.852 m (130.74 ft) long and weigh 508.02 tonnes (1.12 million lb) with tenders.
- YouTube. The Worlds largest diesel locomotive the Union Pacific DD40X #6936 is turned on the old turntable in Cheyenne, Wyoming. The locomotive was built in 1971, weighs 270 tons, and is rated at 6,600 horsepower. This is a active locomotive mostly pulling excursion trains with the Union Pacific #844.
Union Pacific reached out to EMD for more power, and the result was the behemoth EMD DDA40X. Often cited as both the largest and most powerful diesel-electric locomotive ever built, the 98-foot, 5-inch, 475,830-pound machine is staggering. The prime movers are a pair of EMD 16-645E3A diesels.
World's most powerful electric locomotive Shen24 by CRRC for coal cargo service in China. China: The 28.8 MW 24-axle six-section locomotive develops starting tractive effort of 2,280 and continuous tractive effort of 1,596 kN reaching 120 km/h. Its official operation began in June 2021.
As far as I'm aware, there's no legal limit. Passenger trains do not normally exceed 12 cars (around 900 feet, dependent on rolling stock type), but many are much shorter than this.
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.
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.
One of the most beautiful steam locomotives ever built, the S1 was designed by Raymond Loewe. Poor balancing caused wheel-spin and only one was ever built, for the Pennsylvania Railroad in 1939.
The Union Pacific Railroad (reporting marks UP, UPP, UPY) is a Class I freight-hauling railroad that operates 8,300 locomotives over 32,200 miles (51,800 km) routes in 23 U.S. states west of Chicago and New Orleans.
VIA Rail trains' top speeds vary depending on the route and the type of train. In the Quebec City-Windsor Corridor, which is the most heavily traveled and where their high-speed trains operate, trains can reach speeds up to 100 mph (160 km/h).
The Australian BHP Iron Ore is the longest train ever recorded in history at approximately 4.6 miles (7.353 km). In the Pilbara region of Western Australia, BHP owns and runs the Mount Newman railway. This is a private rail network designed to transport iron ore.