List of largest locomotives

Short description: none

As railroads around the world haul larger quantities of freight efficiently, the title of world's largest locomotive has often been passed to new generations of rolling stock.

## Contents

* 1 Standard
* 2 List
* 3 See also
* 4 References
* 5 External links

## Standard

There are many ways in which a locomotive can be the largest: the heaviest, longest, most cylinders, most power, or most wheels. It is often defined as the longest in length, but there is even a debate[according to whom?] on whether or not to include the tender, which is equivalent to the fuel tank of a diesel, in the measurement. To establish the "largest" category, several factors take precedence: overall weight, which gives traction over driving axles; size (length & height of engine itself); and power, which may be in terms of raw horsepower, tractive effort, available power at axles (shaft horsepower) or, in the case of steam locomotives, available steam on a sustained basis.

## List

Name  | Railway  | Series  | Manufacturer  | Dates  | Motive power | Wheel arrangement | Weight  | Tractive Effort/Force | Power | Notes

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China Railways HXD1D prototype  | None (experimental)  | N/A  | CSR Zhuzhou  | Before 2012  | Electric  | Co'Co'  |  | 77,694 pounds-force (346 kN)  | 12,874 horsepower (9,600 kW)  | Currently stored in Zhuzhou plant.
060-EA | Romanian Railways (CFR) and numerous private railways in Romania and Hungary  | 40 (060-EA): 120 km/h, 41 (060-EA1): 160 km/h, 42: 200 km/h  | ASEA (first ten), Electroputere Craiova (the rest, approx. 1,000)  | 1965-91  | Electric  | Co'Co'  | 120 tonnes (132 short tons)  | 93,000 pounds-force (414 kN)  | 6,839 horsepower (5,100 kW)  | Powerful locomotive in the 1970s; high continuous tractive effort.
2-10-10-2  | Santa Fe and Virginian Railway  | 3000-3009 (Santa Fe) 800-809 (Virginian)  | Baldwin Locomotive Works (Santa Fe)
American Locomotive Company (Virginian)  | 1911-1912, 1918  | Steam  | 2-10-10-2  | 415 tonnes (457 short tons)  | 175,000 pounds-force (778 kN) simple; 147,200 pounds-force (655 kN) compound  | N/A  | Weight and performance figures listed for the Virginian variant, as that locomotive was the heavier and more powerful of the two.
2ES10S (3ES10)  | Russian Railways  | N/A  | Ural Locomotives  | 2014–present  | Electric  | 3xBo'Bo'  | 300 tonnes (331 short tons)  | 264,375 pounds-force (1,176 kN)  | 17,701 horsepower (13,200 kW) 1-hour rating  | Three sections modification of 2ES10.
4E5K  | Russian Railways  | N/A  | Novocherkassk Electric Locomotive Plant  | 2014–present  | Electric  | 4xBo'Bo'  | 392 tonnes (432 short tons)  | 304,840 pounds-force (1,356 kN)  | 17,594 horsepower (13,120 kW) 1-hour rating  | Four sections modification of E5K.
AD43C | Iranian Railways (RAI)  | 2001-2100  | Alstom | 2001  | Diesel electric  | Co'Co'  | 120 tonnes (132 short tons)  | 122,000 pounds-force (543 kN)  | 4,300 horsepower (3,207 kW)  | About 50 locomotives are stopped because of failures in the RK 215 diesel engines
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)  | 59,575 pounds-force (265 kN)  | 5,930 horsepower (4,422 kW)  | Largest steam locomotive ever operated in Australia[1]
Ae 6/6 | Swiss Federal Railways  | 11401-11520  | SLM, MFO/BBC  | 1952; 1955–66  | Electric  | Co'Co'  | 120 tonnes (132 short tons)  | 88,125 pounds-force (392 kN)  | 5,766 horsepower (4,300 kW) continuous  | Still in operation as of October 2012[update]
Ae 6/8 | BLS, Switzerland  | 201-208  | SLM / Sécheron  | 1939  | Electric  | (1'Co)(Co1')  | 140 tonnes (154 short tons)  | 79,360 pounds-force (353 kN)  | 5,914 horsepower (4,410 kW) 1-hour rating  | Two remain in working order as heritage locos[when?]
Ae 8/8 | BLS, Switzerland  | 271-275  | SLM / BBC  | 1959-66  | Electric  | (Bo)(Bo)+(Bo)(Bo)  | 160 tonnes (176 short tons)  | 105,885 pounds-force (471 kN)  | 8,683 horsepower (6,475 kW) 1-hour rating  | One preserved in working order.[when?]
Ae 8/14 | Swiss Federal Railways  | 11852  | SLM, MFO/BBC  | 1939  | Electric  | (1'A)A1'A(A1')+(1'A)A1'A(A1')  | 236 tonnes (260 short tons)  | 110,160 pounds-force (490 kN)  | 10,945 horsepower (8,162 kW) 1-hour rating; 10,255 horsepower (7,647 kW) continuous  | Exhibit at Swiss Museum of Transport
Allegheny | Chesapeake & Ohio Railway
Virginian Railway  | 1600-1659 (C&O), 900-907 (VGN)  | Lima Locomotive Works  | 1941-48  | Steam  | 2-6-6-6  | 544 tonnes (600 short tons)  | 110,000 pounds-force (489 kN)  | 7,500 horsepower (5,593 kW)  | Two on static display
Big Blow | Union Pacific  | 1-30 (control cab), 1B-30B (turbine unit)  | General Electric | 1958-61  | Gas turbine-electric  | C-C+C-C  | 425 tonnes (468 short tons)  | 212,312 pounds-force (944 kN)  | 8,469 horsepower (6,315 kW); over 10,000 hp at lower altitude and ambient temperatures (turbine only)  | Two preserved in museums; Surpassed by GT1s.
Big Boy | Union Pacific  | 4000-4024  | ALCO | 1941--44  | Steam  | 4-8-8-4  | 548 tonnes (604 short tons)  | 135,375 pounds-force (602 kN)  | 6,290 horsepower (4,690 kW)  | Several on static display. No. 4014 in service with the UP Heritage Steam collection[2]
BJ 6001 | China Railway  | 北京6001  | Beijing Feb. 7th  | 1969  | Diesel-hydraulic  | D'D'  | N/A  | N/A  | 5,900 horsepower (4,400 kW)  | Most powerful diesel-hydraulic locomotive ever built.
Challenger | Union Pacific  | 3950-3999  | ALCO | 1936-43  | Steam  | 4-6-6-4  | 485 tonnes (535 short tons)  | 97,350 pounds-force (433 kN)  | 5,000 horsepower (3,728 kW)  | Two locomotives preserved, one on static display. Union Pacific 3985 operated for company PR and occasional excursion service from 1981-2010, under overhaul as at May 2022[3]
China Railways DF8DJ  | China Railways  | DF8DJ0001, later DF8B5672  | CSR Ziyang  | 2006  | Diesel-electric  | Co'Co'  | 150 tonnes (165 short tons; 148 long tons)  | 130,389 pounds-force (580 kN) starting

98,916 pounds-force (440 kN) continuous

| 6,437 horsepower (4,800 kW)  | Most powerful single-engine diesel locomotive ever built.
China Railways HXD1 | China Railway  | HXD10001 - HXD10220  | CSR Zhuzhou Electric Locomotive, Siemens  | 2006-08  | Electric  | Bo'Bo'+Bo'Bo'  | 200 tonnes (220 short tons)  | 170,000 pounds-force (756 kN) starting; 111,000 pounds-force (494 kN) continuous  | 12,874 horsepower (9,600 kW)  | N/A
China Railways HXD1B | China Railway  | HXD1B0001-HXD1B0500  | CSR Zhuzhou Electric Locomotive, Siemens  | 2009- | Electric  | Co'Co'  | 150 tonnes (165 short tons)  | N/A  | 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)  | 170,000 pounds-force (756 kN) starting; 111,000 pounds-force (494 kN) continuous  | 9,655 horsepower (7,200 kW)  | N/A
China Railways HXD2 | China Railway  | HXD20001-

HXD20180

| Datong Electric Locomotive, Alstom  | 2006-08  | Electric  | Bo'Bo'+Bo'Bo'  | 200 tonnes (220 short tons)  | 170,000 pounds-force (756 kN)  | 13,410 horsepower (10,000 kW)  | N/A
China Railways HXD2B | China Railway  | HXD2B0001-HXD2B0500  | Datong Electric Locomotive, Alstom  | 2009- | Electric  | Co'Co'  | 150 tonnes (165 short tons)  | 131,000 pounds-force (583 kN) starting; 125,000 pounds-force (556 kN) continuous  | 12,874 horsepower (9,600 kW)  | One of the most powerful single-frame locomotives currently[when?] in series production.
China Railways HXD2C | China Railway  | HXD2C0001-  | Datong Electric Locomotive, Alstom  | 2010- | Electric  | Co'Co'  | 150 tonnes (165 short tons)  | 130,000 pounds-force (578 kN) starting; 90,000 pounds-force (400 kN) continuous  | 9,655 horsepower (7,200 kW)  | N/A
China Railways HXD3 | China Railway  | HXD30001-HXD30890, HXD38001-38150  | Toshiba, Dalian Locomotive  | 2006-09  | Electric  | Co'Co'  | 150 tonnes (165 short tons)  | 130,000 pounds-force (578 kN)  | 9,655 horsepower (7,200 kW)  | N/A
China Railways HXD3B | China Railway  | HXD3B0001-HXD3B0500  | Dalian, Bombardier  | 2009- | Electric  | Co'Co'  | 150 tonnes (165 short tons)  | 128,000 pounds-force (569 kN) starting; 114,000 pounds-force (507 kN)  | 12,874 horsepower (9,600 kW) 1-hour rating  | One of the most powerful single-frame locomotives currently[when?] in series production.
China Railways HXD3C | China Railway  | HXD3C0001-  | Dalian, Bombardier  | 2010- | Electric  | Co'Co'  | 150 tonnes (165 short tons)  | 130,000 pounds-force (578 kN) starting; 83,000 pounds-force (369 kN)  | 9,655 horsepower (7,200 kW)  | N/A
China Railways HXN3 | China Railway  | HXN30001 - HXN30300  | Dalian Locomotive, Electro-Motive Diesel  | 2008- | Diesel-Electric  | Co'Co'  | 150 tonnes (165 short tons)  | 140,000 pounds-force (623 kN) starting;

134,000 pounds-force (596 kN) continuous

| 6,300 horsepower (4,698 kW)  | Most powerful diesel-electric locomotive in active production.[when?]
China Railways HXN5 | China Railway  | HXN50001 - HXN50300  | GE, CRRC Qishuyan  | 2008- | Diesel-Electric  | Co'Co'  | 150 tonnes (165 short tons)  | 140,000 pounds-force (623 kN) starting; 127,000 pounds-force (565 kN) continuous  | 6,250 horsepower (4,661 kW)  | Most powerful diesel-electric locomotive in active production.[when?]
Class 461 | Železnice Srbije, Serbia  | ŽS461-0/1, ŽS461-2  | Electroputere Craiova, Romania  | 1965–91  | Electric  | Co'Co'  | 120 tonnes (132 short tons)  | 88,125 pounds-force (392 kN)  | 7,638 horsepower (5,696 kW)  | Operational in Romania, Serbia, Montenegro, Bulgaria, Hungary & Macedonia.[when?]
DB Class 101 | Deutsche Bahn  | 101 001-145  | Adtranz  | 1996-99  | Electric  | Bo'Bo'  | 83 tonnes (91 short tons)  | 67,443 pounds-force (300 kN)  | 8,583 horsepower (6,400 kW) continuous  | Maximum speed 220 km/h (137 mph).
DB Class 103 | Deutsche Bahn  | 103 101-245  | AEG, Brown, Boveri & Cie, Henschel, Krauss-Maffei, Krupp, Siemens | 1970-73  | Electric  | Co'Co'  | 114 tonnes (126 short tons)  | 70,140 pounds-force (312 kN)  | 16,270 horsepower (12,133 kW) or 13,900 horsepower (10,365 kW) short term;

10,433 horsepower (7,780 kW) 1-hour rating; 9,977 horsepower (7,440 kW) continuous rating

| One of the most powerful electric locomotives ever built, it also is the most powerful single-frame locomotive ever built (currently[when?] its maximum short term power is limited to 12,000 horsepower (8,948 kW)); It has immense short term power with a tractive effort of 312 kN up to a speed of 140 km/h (87 mph).
DB Class 151 | Deutsche Bahn  | 151 001-170  | AEG, BBC, Henschel, Krauss-Maffei, Krupp, Siemens | 1972-78  | Electric  | Co'Co'  | 118 tonnes (130 short tons)  | 88,800 pounds-force (395 kN)  | 8,432 horsepower (6,288 kW)  | Powerful freight locomotive in the 1970s with high continuous tractive effort.
DSB EG | DB Schenker Rail  | 3103-3113  | Siemens | 1999-2000  | Electric  | Co'Co'  | 132 tonnes (146 short tons)  | 89,930 pounds-force (400 kN)  | 8,717 horsepower (6,500 kW) continuous  | One of the most powerful single-frame electric locomotives in operation in Europe[when?].
EMD DDA40X | Union Pacific  | 6900-6946  | Electro-Motive Diesel  | 1969-71  | Diesel-electric  | Do'Do'  | 244 tonnes (269 short tons)  | 113,940 pounds-force (507 kN) starting; 103,000 pounds-force (458 kN) continuous  | 6,600 horsepower (4,922 kW)  | One operational, 13 in various museums; largest operational single-unit diesel locomotive and the most powerful.[when?]
EMD SD70ACe-T4  | Union Pacific

BNSF CSX

| 3000-3099 (Union Pacific)  | Electro-Motive Diesel (EMD)  | 2015–present  | Diesel-electric  | Co'Co'  | 218 tonnes (240 short tons)  | 200,000 pounds-force (890 kN) starting

175,000 pounds-force (778 kN) continuous

| 4,400 horsepower (3,281 kW)  | N/A
EMD SD90MAC | Union Pacific  | 8500-8561  | Electro-Motive Diesel  | 1996-2002  | Diesel-electric  | Co'Co'  | 210 tonnes (231 short tons)  | 200,000 pounds-force (890 kN) starting; 165,000 pounds-force (734 kN) continuous  | 6,300 horsepower (4,698 kW)  | Retired from service, some on lease with EMLX[when?].
Erie Class P-1  | Erie Railroad  | 2603-2605, later 5014-5016  | Baldwin Locomotive Works  | 1914-1916  | Steam  | 2-8-8-8-2  | 531 tonnes (585 short tons)  | 176,256 pounds-force (784 kN)  | N/A  | Maximum speed approx. 10 mph.
EuroSprinter | Deutsche Bahn, ÖBB  | N/A  | Krauss-Maffei, Siemens | 1996-2001  | Electric  | Bo'Bo'  | 86 tonnes (95 short tons)  | 67,000 pounds-force (298 kN)  | 9,790 horsepower (7,300 kW) short term;

8,583 horsepower (6,400 kW) continuous

| Maximum speed 230 km/h (143 mph); Taurus Rh 1216 050-5 holds the world speed record for conventional electric locomotives [when?] at 357 km/h (222 mph).
Eurotunnel Class 9 | Getlink  | 9000  | Euroshuttle Locomotive Consortium  | 1993-2002  | Electric  | Bo-Bo-Bo  | 132 tonnes (146 short tons)  | 90,000 pounds-force (400 kN) starting; 70,000 pounds-force (311 kN) continuous  | 9,400 horsepower (7,010 kW)  | Always used in pairs (one at each end of the train). Early versions were 7,500 horsepower (5,593 kW) but most have been rebuilt to 7 MW.
GE AC6000CW | Union Pacific; CSX; BHP | 600-699, 5000-5016, 6070-6077, 7500-7579 (being overhauled[when?] and renumbered 69xx)  | General Electric  | 1996-2001  | Diesel-electric  | Co'Co'  | 210 tonnes (231 short tons)  | 188,000 pounds-force (836 kN) starting; 166,000 pounds-force (738 kN) continuous  | 6,250 horsepower (4,661 kW)  | Actual HP output on early production units is 4,350 hp due to use of the 7FDL engine.
GT1s  | Russian Railways  | N/A  | Sinara transport machines  | N/A  | Gas turbine-electric  | N/A  | 360 tonnes (397 short tons)  | 220,313 pounds-force (980 kN)  | 11,130 horsepower (8,300 kW)  | Currently the most powerful non-electric locomotive ever produced.
H220 | Victorian Railways  | H class  | Newport Workshops  | 1941–1958  | Steam  | 4-8-4  | 265 tonnes (292 short tons)  | 55,060 pounds-force (245 kN)  | 3,600 horsepower (2,685 kW)  | The most powerful steam locomotive built in Australia at the time. Only one was constructed, preserved at the Australian Railway Historical Society Museum.[4]
Indian locomotive class WAG-7 | Indian Railways  | 27001-27999, 28000-28770, 24501-24700  | Chittaranjan Locomotive Works, India, BHEL, India | 1992  | Electric  | Co'Co'  | 132 tonnes (146 short tons)  | 135,000 pounds-force (601 kN)  | 8,200 horsepower (6,115 kW)  | N/A
Indian locomotive class WAG-9 | Indian Railways  |  | Chittaranjan Locomotive Works, Electric Locomotive Works, Bhusawal  | 1996–  | Electric  | Co'Co'  | 123 tonnes (136 short tons)  | 100,000 pounds-force (445 kN); 73,000 pounds-force (325 kN) continuous  | 6,600 horsepower (4,922 kW)  |
Indian locomotive class WAG-9H | Indian Railways  |  | Chittaranjan Locomotive Works, Electric Locomotive Works, Bhusawal  | 2000–  | Electric  | Co'Co'  | 132 tonnes (146 short tons)  | 120,000 pounds-force (534 kN)
Continuous:73,000 pounds-force (325 kN)  | 6,600 horsepower (4,922 kW)  |
Indian locomotive class WAG-9HH | Indian Railways  | 90001+  | Chittaranjan Locomotive Works, India  | 2019-  | Electric  | Co'Co'  | 135 tonnes (149 short tons)  |  | 9,000 horsepower (6,711 kW)  |
Indian locomotive class WAG-11 | Indian Railways  | 29001+  | Banaras Locomotive Works Varanasi  | 2018 - Present  | Electric  | Co'Co'  |  |  | 11,000 horsepower  |
Indian locomotive class WAG-12 | Indian Railways  | WAG12B60001+ onward  | ELF Madhepura  | 2018–present  | Electric  | Bo'Bo'+Bo'Bo'  | 180 tonnes (198 short tons; 177 long tons)

Up-gradable to 200 tonnes (220 short tons; 197 long tons)

| 176,475 pounds-force (785 kN) starting  |

12,000 horsepower (8,948 kW)

IORE | MTAB  | IORE 101 - 126  | Bombardier  | 2000-04  | Electric  | Co'Co'+Co'Co'  | 360 tonnes (397 short tons)  | 314,732 pounds-force (1,400 kN)  | 14,483 horsepower (10,800 kW)
continuous rating (for a pair)  | The most powerful double-frame locomotive in series production.[when?] It also has the largest tractive effort of any locomotive ever built.[when?] It is possible to operate individual halves, however it is not usually done.
Jawn Henry  | Norfolk & Western  | 2300  | Baldwin Locomotive Works  | 1954-58  | Steam turbine electric  | C+C-C+C  | 404 tonnes (445 short tons)  | 175,000 pounds-force (778 kN)[5] | 4,500 horsepower (3,356 kW)  | Struck from the N&W roster on January 4, 1958.
JR Freight Class EF200 | JR Freight  | N/A  | Hitachi | 1990- | Electric  | Bo'Bo'Bo'  | 100.8 tonnes (111 short tons)  | 59,000 pounds-force (262 kN)  | 8,046 horsepower (6,000 kW)  | Most powerful single-frame narrow-gauge locomotive in series production[when?].
Korail Class 8500 | Korail  | 8501-8587  | Hyundai Rotem | 2012-2014  | Electric  | Co'Co'  | 132 tonnes (146 short tons)  | 101,164 pounds-force (450 kN)  | 9,600 horsepower (7,159 kW) (1-hour rating); 9,300 horsepower (6,935 kW) continuous  | 73 feet (22 m) overall length.
Little Joe  | Milwaukee Road  | EF-4 and EP-4  | General Electric | 1950-80  | Electric  | 2-D+D-2  | 247.5 tonnes (273 short tons)  | 75,700 pounds-force (337 kN)  | 5,110 horsepower (3,811 kW)  | Maximum speed of 68 mph, used for freight and passenger.
M1 | Chesapeake & Ohio Railway  | 500-502  | Baldwin Locomotive Works  | 1947-50  | Steam turbine electric  | 2-C1-2-C1-B (4-8-0-4-8-4)  | 428 tonnes (472 short tons)  | 98,000 pounds-force (436 kN)  | 6,000 horsepower (4,474 kW) turbine; 4,960 horsepower (3,699 kW) generators  | Nicknamed "Sacred Cows". Sold back to Baldwin in 1950 and scrapped.
Norfolk & Western Y Class | Norfolk & Western  | N/A  | Roanoke Shops  | 1940s  | Steam  | 2-8-8-2  | 449 tonnes (495 short tons)  | 166,000 pounds-force (738 kN)  | 5,600 horsepower (4,176 kW)  | Norfolk and Western 2156 is strongest-pulling steam locomotive still in existence[when?].
PRR GG1 | Pennsylvania Rail Road, Penn Central, Conrail, Amtrak and NJ Transit  | 4800-4938, 900-929  | Altoona Works, General Electric | 1934–43  | Electric  | 2-C+C-2 (4-6-6-4)  | 216.4 tonnes (239 short tons)  | 65,500 pounds-force (291 kN)  | 4,629 horsepower (3,452 kW)  | Most scrapped; the prototype and 15 production locomotives have been preserved in museums.
PRR Q2 | Pennsylvania Railroad  | 6131, 6175-6199  | Altoona Works  | 1941-45  | Steam  | 4-4-6-4  | 456 tonnes (503 short tons)  | 115,816 pounds-force (515 kN) with booster  | 7,987 horsepower (5,956 kW)  | Most powerful steam locomotive ever static tested.
PRR S1 | Pennsylvania Railroad  | 6100  | Altoona Works  | 1939  | Steam  | 6-4-4-6  | 487 tonnes (537 short tons)  | 76,403 pounds-force (340 kN)  | 7,200 horsepower (5,369 kW)  | Fast passenger steam locomotive; the magazine Popular Mechanics cites 1941 a speed of 133.4 mph (214.7 km/h)
PRR S2 | Pennsylvania Railroad  | 6200  | Baldwin Locomotive Works  | 1944  | Steam turbine direct-drive  | 6-8-6  | 470 tonnes (518 short tons)  | 70,500 pounds-force (314 kN)  | 6,900 horsepower (5,145 kW)  | Most powerful steam turbine locomotive ever built.
Re 4/4 | BLS, Switzerland  | Re 425 161-Re 425 195)  | SLM / BBC  | 1964-83  | Electric  | Bo'Bo'  | 80 tonnes (88 short tons)  | 70,590 pounds-force (314 kN)  | 6,678 horsepower (4,980 kW) continuous  | In operation as of October 2012[update]
Re 465 | BLS, Switzerland  | Re 465 001-465 0018  | SLM, ABB | 1994-97  | Electric  | Bo'Bo'  | 84 tonnes (93 short tons)  | 71,940 pounds-force (320 kN)  | 9,390 horsepower (7,002 kW) short term 8,410 horsepower (6,271 kW) continuous;  | Similar locomotives with slightly different technical data are in operation with SBB (Re 460; 119 pc/NSB (El 18; 22 pc)/VR (Sr2; 46 pc)/KCRC (Hong Kong; 2 pc).
Re 6/6 | SBB, Switzerland  | 11601-11689  | SLM, MFO/BBC/Sécheron | 1972, 1975–80  | Electric  | Bo'Bo'Bo'  | 120 tonnes (132 short tons)  | 89,475 pounds-force (398 kN)  | 10,460 horsepower (7,800 kW) 1-hour rating; 9,705 horsepower (7,237 kW) continuous  | At the time of construction (1972) one of the world's most powerful locomotives. Currently in operation as of May 2022[update] with the revised classification of Re 620.
Shen 24[6][7] | Shenhua Mining Group  |  | CRRC Zhuzhou  | 2020–present  | Electric  | 6xBo'Bo'  |  | 2,280 kilonewtons (512,564 lbf)  | 28,800 kilowatts (38,621 hp)  | Six-section modification of HXD1, 106 metres (348 ft) long overall.
Shenhua Mining Group HXD1  | Shenhua Mining Group  | HXD1.7 | CRRC Zhuzhou  | 2013  | Electric  | 3xBo'Bo'  | 276 tonnes (304 short tons; 272 long tons)  | 256,282 pounds-force (1,140 kN)  | 12,900 horsepower (9,620 kW) continuous rating  | Heavy haul locomotive of China
SJ Dm3 | SJ  | N/A  | ASEA  | 1953-71  | Electric  | 1'D+D+D1'  | 273 tonnes (301 short tons)  | 940 kilonewtons (211,320 lbf)  | 7,200 kilowatts (9,655 hp)  | Highest continuous tractive effort when built, most powerful locomotive using jackshafts.
Softronic Transmontana | Romanian Railways (CFR) and diverse private railways in Romania and Hungary  | 480 (Romania) 610 (Hungary)  | Softronic Craiova  | 2010–present  | Electric  | Co'Co'  | 120 tonnes (132 short tons)  | 97,800 pounds-force (435 kN)  | 8,851 horsepower (6,600 kW) 1-hour rating;

8,046 horsepower (6,000 kW) continuous

| Based on the ASEA 060-EA, but with asynchronous traction motors, IGBT and computerized control.
Stadler Euro Dual | N/A  | N/A  | Stadler Rail  | 2012  | Dual power electro-diesel locomotive  | Co'Co'  | 114 tonnes (126 short tons) - 126 tonnes (139 short tons)  | 107,000 pounds-force (476 kN)  | 9,387.15 horsepower (7,000 kW)  |
Union Pacific 9000 class  | Union Pacific  | 9000-9087  | American Locomotive Company | 1926-1930  | Steam  | 4-12-2  | 355 tonnes (391 short tons)  | 97,664 pounds-force (434 kN)  | 4,750 horsepower (3,542 kW)  | N/A
Union Pacific Coal GTELs | Union Pacific  | 80 (later 8080)  | Union Pacific Omaha Shops  | 1961  | Diesel-electric + gas turbine-electric  | A1A-A1A+2-D-D-2  | 661 tonnes (729 short tons)  | N/A  | 7,000 horsepower (5,220 kW) (2,000 hp Diesel + 5,000 hp turbine)  | Home-built experimental coal-fired gas turbine. Assembled from ALCO PA-1 UP #607, GN W1 #5018, and the tender from Challenger #3990. 215 feet (66 m) overall length; 1,457,280 pounds (661,011 kg) total weight. Unsuccessful; set aside in 1964 and scrapped in 1968.
Virginian Railway EL-3A | Virginian Railway  | 100-109  | ALCO + Westinghouse | 1925-1926  | Electric  | 1-D-1+1-D-1+1-D-1  | 624 tonnes (688 short tons)  | 277,500 pounds-force (1,234 kN)  | 7,125 horsepower (5,313 kW) (1-hour rating); 6,000 horsepower (4,474 kW) continuous  | 152.25 feet (46 m) overall length.
VL85 | Russian Railways  | 270  | Novocherkassk Electric Locomotive Plant  | 1983-94  | Electric  | Bo'Bo'Bo'+Bo'Bo'Bo'  | 300 tonnes (331 short tons)  | 209,522 pounds-force (932 kN)  | 12,550 horsepower (9,359 kW) continuous; 13,437 horsepower (10,020 kW) short term  | N/A
Voith Maxima | N/A  | N/A  | Voith | 2006-14  | Diesel-hydraulic  | Co'Co'  | 136 tonnes (150 short tons)  | 91,730 pounds-force (408 kN)  | 5,000 horsepower (3,728 kW) continuous (Maxima 40CC)  | Voith Maxima 40CC is the most powerful single-engine diesel-hydraulic locomotive ever built.
XA Triplex | Virginian Railway  | 700  | Baldwin  | 1916  | Steam  | 2-8-8-8-4  | 532 tonnes (586 short tons)  | 166,600 pounds-force (741 kN) compound  | N/A  | Rebuilt into separate locomotives; Maximum speed approx. 10 mph.
Yellowstone | Northern Pacific, Duluth, Missabe & Iron Range Railway and Baltimore & Ohio  | 220-237 (DM&IR)  | Baldwin Locomotive Works  | 1928-1945  | Steam  | 2-8-8-4  | 566 tonnes (624 short tons)  | 140,093 pounds-force (623 kN)  | 6,250 horsepower (4,661 kW)  | Figures are for the DM&IR Yellowstones, the largest and generally the most well-known of their type.

## See also

* List of largest passenger vehicles

## References

1. ↑ NSWGR AD60 Class Beyer-Garratt Locos Locomotives International issue 132 August 2021 page 16
2. ↑ Big Boy 4014 is back: UP restores, runs iconic train Railway Age May 8, 2019
3. ↑ Union Pacific donates Challenger for overhaul Steam Railway issue 532 May 27, 2022 page 22
4. ↑ Heavy Harry, H220 Newsrail April 1978 page 55
5. ↑ "The N&W's Jawn Henry", https://www.american-rails.com. Retrieved 10 July 2018.
6. ↑ "28·8 MW freight locomotive unveiled" (in en). 2020-08-04. https://www.railwaygazette.com/traction-and-rolling-stock/288-mw-freight-locomotive-unveiled/57096.article.
7. ↑ "CRRC Zhuzhou unveils 28.8MW electric freight locomotive" (in en). 2020-08-04. https://www.railjournal.com/locomotives/crrc-zhuzhou-unveils-28-8mw-electric-freight-locomotive/.

## External links

* Steamlocomotive.com article regarding the largest steam locomotives archive at the Internet Archive Wayback Machine

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