Under the Whyte notation for the classification of steam locomotives, 2-8-0 represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, eight powered and coupled driving wheels on four axles, and no trailing wheels. In the United States and elsewhere, this wheel arrangement is commonly known as a Consolidation.
Other equivalent classifications are:
- UIC classification: 1D (also known as German and Italian classifications)
- French classification: 140 (also known as Spanish classification)
- Turkish classification: 45
- Swiss classification: 4/5
- Russian classification: 1-4-0
Of all the locomotive types that were created and experimented with in the nineteenth century, the 2-8-0 was a relative latecomer.
The first locomotive of this wheel arrangement was possibly built by the Pennsylvania Railroad (PRR). Like the first 2-6-0s, this first 2-8-0 had a leading axle that was rigidly attached to the locomotive's frame, rather than on a separate truck or bogie. To create this 2-8-0, PRR master mechanic John P. Laird modified an existing 0-8-0, the Bedford, between 1864 and 1865.
The 2-6-0 "Mogul", first created in the early 1860s, is often considered as the logical forerunner to the 2-8-0. However, there is also a claim that the first true 2-8-0 engine evolved from the 0-8-0 and was ordered by the US’s Lehigh and Mahanoy Railroad, who named all its engines. The name given to the new locomotive was "Consolidation", the name that was later almost globally adopted for the type. According to this viewpoint, the first 2-8-0 order by Lehigh dates to 1866 and predates the adoption of the type by other railways and coal and mountain freight haulers.
From its introduction in 1866 and well into the early twentieth century, the 2-8-0 design was considered to be the ultimate heavy freight locomotive. The 2-8-0’s forte was starting and moving 'impressive loads at unimpressive speeds' and its versatility gave the type its longevity. The practical limit of the design was reached in 1915, when it was realised that there was no further development possible with a locomotive of this wheel arrangement.
As in the United States, the 2-8-0 was also a popular type in Europe, again largely as a freight hauler. The type was also used in Australia and New Zealand, but was not widely used in Africa.
The 2-8-0 locomotive saw extensive use throughout Australia. It served on the 5 ft 3 in (1,600 mm), 4 ft 8 1⁄2 in (1,435 mm) standard gauge and 3 ft 6 in (1,067 mm) gauge and was employed mostly as a freight locomotive, although it was often also employed in passenger service in Victoria.
The first Australian locomotive class in this wheel arrangement consisted of twenty standard gauge New South Wales Government Railways (NSWGR) J Class engines, which arrived from Baldwin Locomotive Works in 1891. The J's remained in service in New South Wales (NSW) until 1915, when they were withdrawn. War time shortages between 1916 and 1920 saw six engines re-entering service after being shopped and fitted with superheaters. The last engine of this class was finally withdrawn in 1934 and all were scrapped by 1937.
The second batch of 2-8-0 locomotives to appear in Australia, between 1896 and 1916, was the NSWGR T class engines. The class was delivered from one local and several overseas builders, 151 locomotives from Beyer, Peacock and Company (BP), 84 from North British Locomotive Company (NBL), ten from Neilson and Company, thirty from Clyde Engineering in Australia and five from Dübs and Company. During World War II, fourteen of these locomotives were equipped with superheaters, which raised their tractive effort from 28,777 pounds-force (128.0 kilonewtons) to 33,557 pounds-force (149.3 kilonewtons).
- The first of these locomotives were the Baldwin built V class. These engines were also built at Phoenix Foundry in Ballarat, Victoria. By 1930 they had disappeared from the VR.
- The VR’s next type was the twenty-six C class engines, which saw freight and passenger service.
- In 1922 a smaller and lighter 2-8-0, the K class, was introduced for branch line freight and later also passenger services.
- Finally the VR introduced sixty light 2-8-0 J class engines in 1954. These also worked both freight and passenger services.
The first 2-8-0 engines in private service on the Midland Railway of Western Australia (MRWA) arrived in 1912. These were 3 ft 6 in (1,067 mm) gauge locomotives. There were five in the class and they operated until 1958. All were gone by 1963.
In 1912 some of the NSWGR T class types were also purchased by the private East Greta Railway, later to become the South Maitland Railway, but these were converted to 2-8-2T tank locomotives. The class proved to be successful throughout its long service life, until being retired from government revenue service in 1973.
In 1924 a private coal company, J&A Brown in NSW, obtained three ex-British military Railway Operating Division (ROD) 2-8-0 locomotives. Brown later ordered another ten of these locomotives, but only nine of that order arrived in Australia. The last was withdrawn in 1973.
To compensate for wartime losses, Belgian railways acquired three hundred 2-8-0 locomotives in 1946. They were built in North America, 160 by Montreal Locomotive Works (MLW) in Canada, sixty by the Canadian Locomotive Company (CLC) and eighty by the American Locomotive Company (ALCO) in the United States. These machines proved to be very reliable and were used for mixed traffic until the end of the steam era, when number 29.013 hauled the last scheduled steam passenger train from Ath to Denderleeuw on 20 December 1966.
This locomotive survived in preservation and is used on special excursions. On 16 December 2006 number 29.013 re-enacted the last 1966 run on the same route.
Finland had five tender locomotive classes with a 2-8-0 wheel arrangement, the Classes Tk1, Tk2, Tk3, Tv1 and Tv2.
The Class Tk1s were numbered from 271 to 290 and were nicknamed “Amerikan Satikka”.
The Class Tk2s were numbered 407 to 426 and 457 to 470. They were nicknamed “Satikka”. Three were preserved, no. 407 at Närpes, no. 418 at Junction City, Oregon in the United States of America and no. 419 at Haapamäki.
The Class Tv1s were numbered 594 to 617, 685 to 741, 900 to 948 and 1200 to 1211. They were built by Tampella and were nicknamed “Jumbo”. Four were preserved, no. 609 at Haapamäki, no. 933 at the Veturi museum at Toijala, no. 940 at Lapinlahti and no 943 at Ylivieska.
The Class Tv2s were numbered from 618 to 637. They were nicknamed “Wilson”. Only no. 618 was preserved, also at Haapamäki.
Finland had only one tank locomotive class with a 2-8-0 wheel arrangement, the Class M1 consisting of one solitary locomotive numbered 66. It was not preserved.
The 2-8-0 wheel arrangement enjoyed a brief period of popularity in Germany during the era of the Länderbahnen or State Railways, from about 1840 to 1920, prior to the establishment of the Deutsche Reichsbahn, the German National Railways, after World War I. Under the Deutsche Reichsbahn-Gesellschaft (DRG) classification system, all 2-8-0 locomotives were assigned to Class 56 (Baureihe or BR 56), with different types receiving sub-classifications. The earliest type was the Prussian G73 of 1893.
Several 2-8-0 locomotives were supplied to New Zealand by the Baldwin Locomotive Works (BLW) of Philadelphia in the United States of America. Six O Class locomotives were built for the New Zealand Railways (NZR) in 1885.
The Wellington and Manawatu Railway Company (WMR), which operated the Wellington-Manawatu line, had four similar locomotives built by Baldwin, two in 1888, one in 1894 and one in 1896. The WMR locomotives of 1894 and 1896, no. 12 and no. 13, were Vauclain compound locomotives, the first in New Zealand and the first narrow gauge compounds in the world. While standard gauge compounds usually had the low pressure cylinder mounted below the high pressure cylinder on each side, this was often reversed on narrow gauge locomotives, which had the larger low pressure cylinders mounted above the high pressure cylinders to provide greater clearance at platforms.
In 1908, when the WMR was nationalized, these locomotives were classified into three NZR sub-classes because of detail differences, the two 1888 locomotives as OB class, the 1894 locomotive as OA class and the 1896 locomotive as OC class.
In Russia the 2-8-0 wheel arrangement was represented by the pre-revolutionary Sch (Shuka-pike) class. These two cylinder compound locomotives without superheaters were declared the standard Russian freight locomotive in 1912, but since they were relatively low-powered locomotives, they were only useful on easier lines without steep gradients such as the Saint Petersburg-Moscow route.
Five 2-8-0 locomotive classes saw service in South Africa, all of them initially acquired by the Cape Government Railways (CGR) who classified all but two as Cape Class 8. All of them were variations on the same design, used saturated steam and had cylinders with overhead slide valves actuated by inside Stephenson valve gear.
- In 1901 and 1902 the CGR placed sixteen Consolidations in service. Designed by H.M. Beatty, Chief Locomotive Superintendent of the CGR from 1896 to 1910, they were ordered from the Schenectady Locomotive Works in the United States and partly delivered by Schenectady in 1901, with the remainder delivered from the newly established American Locomotive Company (ALCO) in 1902. Conceived as mixed traffic locomotives, they had bar frames and narrow fireboxes. In 1912, when these locomotives were assimilated into the South African Railways (SAR), they were reclassified to Class 8X.
- In 1902 the CGR also placed a single experimental tandem compound Consolidation in service, based on its Schenectady/ALCO built Class 8. Delivered by ALCO in 1902, the locomotive was not classified and was simply referred to as the Tandem Compound. In 1912 it was classified as Class Experimental 2 on the SAR.
- In 1903 the CGR received a second experimental tandem compound Consolidation from ALCO. It was similar to the earlier one, but with a larger fire grate and an increased heating surface, which enhanced its steaming ability. It also remained unclassified and was also simply referred to as a Tandem Compound. In 1912 it was classified as Class Experimental 3 on the SAR.
- Also in 1903, the CGR received four more Consolidations from Kitson and Company of Hunslet in Leeds. They were very similar to the earlier Schenectady and ALCO built Consolidations, but with the boiler centre line raised by 2 inches (51 millimetres). Coupled with a shallow firebox, this enabled the grate to be extended out sideways over the fourth set of drivers, resulting in a grate area of 30.9 square feet (2.871 square metres) compared to the 20 square feet (1.858 square metres) of the previous model. In 1912 they were reclassified to Class 8Y on the SAR.
- In 1904 the CGR placed its last eight Consolidations in service. These were ordered from the North British Locomotive Company (NBL) of Glasgow in Scotland and were very similar to the previous four Kitson built locomotives, but slightly larger in boiler and firegrate area dimensions. In 1912 these eight were reclassified to Class 8Z on the SAR.
While subjecting the Consolidations to exhaustive testing on all types of traffic and under varying conditions, some trouble was experienced with the leading pony truck and it was dropped in favour of a four wheeled bogie in later orders for more locomotives. All subsequent Cape Class 8 locomotives were therefore built with a 4-8-0 Mastodon wheel arrangement.
South West Africa
In 1907 and 1910 the Staatsbahn Keetmanshoop (Keetmanshoop State Railway) in Deutsch-Südwest-Afrika (German South West Africa) placed twenty-one tank locomotives in service. After the first World War, when all railways in the territory came under the administration of the South African Railways in 1922, five locomotives of the batch of 1910 survived. They were not classified or renumbered but were referred to as the Eight-Coupled Tanks.:99, 149
In 1911 nine tender locomotives were placed in service by the Staatsbahn Lüderitzbucht-Keetmanshoop (Lüderitzbucht-Keetmanshoop State Railway). After the first World War all nine locomotives came onto the roster of the South African Railways, where they were referred to as the Eight-Coupled Tenders.:99, 149
Turkey was a neutral country during World War II and in order to retain Turkish goodwill, Great Britain supplied several locomotives to the Turkish Railways, where they were classified 8F.
The 2-8-0 gradually became the standard heavy freight steam locomotive type in the United Kingdom during the first half of the 20th century. The first 2-8-0 to be built in Britain was the Great Western Railway's 2800 Class, with 84 locomotives built between 1903 and 1919, followed by a further 83 of the very similar GWR 2884 Class between 1938 and 1942. In 1904 George Whale of the London and North Western Railway (LNWR) began to rebuild some of his predecessor's 0-8-0 compound locomotives to 2-8-0 simple expansion.
In 1911 John G. Robinson of the Great Central Railway (GCR) introduced his very successful GCR Class 8K for heavy freight. 129 of these were originally built by the GCR. During the First World War the design was adopted by the Ministry of Munitions and it became the standard locomotive of the Railway Operating Division of the Royal Engineers as the ROD 2-8-0. Altogether 521 of these ROD locomotives were built during the war. After the war large numbers of these were purchased by the LNWR and GWR, while some were also sold to a private Australian coal company, J&A Brown in New South Wales. Altogether 273 were purchased by the London and North Western Railway (LNWR) during the early 1920s.
Other successful 2-8-0 designs were built in the UK. The classes O1 and O2 were introduced by Nigel Gresley of the Great Northern Railway in 1913 and 1918 respectively, and the Class 7F by Henry Fowler of the Somerset and Dorset Joint Railway in 1914.
The most successful British 2-8-0 class was the Class 8F, designed in 1935 by William Stanier for the London Midland and Scottish Railway (LMS). By 1946, 852 had been built. During the Second World War the War Department (WD) originally chose the Class 8F as its standard freight locomotive and large numbers of them saw service overseas, notably in the Middle East.
The Class 8F was superseded after 1943 by the cheaper WD Austerity 2-8-0 for war service. A total of 935 of these were built, and again many saw service overseas.
In the United States, only a few railroads purchased Consolidation types when Baldwin Locomotive Works first introduced its version. Even the Baltimore & Ohio (B&O) railroad, which eventually had nearly 180 2-8-0 locomotives in regular service by 1885, didn't purchase any of this type until 1873. The Buffalo, Rochester and Pittsburgh Railway (BR&P) that eventually became part of B&O, purchased fifteen of this type from Brooks Locomotive Works in 1883.
The 2-8-0 design was given a major boost in 1875 when the Pennsylvania Railroad made it their standard freight locomotive. 1875 was also the year that the Erie Railroad began replacing its 4-4-0s in freight service with 2-8-0s. The railroads had found that the 2-8-0 could move trains twice as heavy at half the cost of its predecessors. From a financial standpoint at the time, the choice of the 2-8-0 as new freight locomotive was therefore clear.
Production of the 2-8-0 type in the U.S. totaled more than 33,000 locomotives, of which 12,000 were export versions. The S160 Class of the United States Army Transportation Corps was built by American manufacturers and was designed for use in Europe for heavy freight work during World War II. A total of 2,120 of this class were built and they worked on railroads across the world.
The Southern Pacific Railroad’s locomotive no. SP 2562 was built by the Baldwin Locomotive Works in 1909 (serial no. 29064). It is on exhibit in the Arizona Railway Museum in Chandler, Arizona. The locomotive and its tender are listed in the National Register of Historic Places, reference no. 09000511.
The Atchison, Topeka and Santa Fe Railroad’s class 759 locomotive no. 761 was built around 1890. When active, it was used on the railroad's mainline between Chicago and the west. No. 761 is plinthed next to the historic Wickenburg, Arizona train depot that is now the town's visitor center.
The Colorado & Southern (C&S) narrow gauge no. 60 is on display in Idaho Springs, Colorado, while C&S no. 71 is in Central City, Colorado.
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