4-4-0

4-4-0 is a locomotive type with a classification that uses the Whyte notation for the classification of steam locomotives by wheel arrangement and represents the arrangement: four leading wheels on two axles (usually in a leading bogie), four powered and coupled driving wheels on two axles, and a lack of trailing wheels. Due to the large number of the type that were produced and used in the United States, the 4-4-0 is most commonly known as the American type, but the type subsequently also became popular in the United Kingdom, where large numbers were produced.White, John H., Jr. (1968). ''A history of the American locomotive; its development: 1830-1880''. New York: Dover Publications, pp. 46-.

Almost every major railroad that operated in North America in the first half of the 19th century owned and operated locomotives of this type.

The first use of the name ''American'' to describe locomotives of this wheel arrangement was made by '' Railroad Gazette'' in April 1872. Prior to that, this wheel arrangement was known as a ''standard'' or ''eight-wheeler''.

This locomotive type was so successful on railroads in the United States that many earlier and locomotives were rebuilt as 4-4-0s by the middle of the 19th century.Kinert, Reed. (1962). ''Early American steam locomotives; 1st seven decades: 1830-1900''. Seattle, WA: Superior Publishing Company.

Several 4-4-0 tank locomotives were built, but the vast majority of locomotives of this wheel arrangement were tender engines.

Development

American development

Five years after new locomotive construction had begun at the West Point Foundry in the United States with the '' Best Friend of Charleston'' in 1831, the first 4-4-0 locomotive was designed by Henry R. Campbell, at the time the chief engineer for the Philadelphia, Germantown and Norristown Railway. Campbell received a patent for the design in February 1836 and soon set to work building the first 4-4-0.

At the time, Campbell's 4-4-0 was a giant among locomotives. Its cylinders had a bore with a piston stroke, it boasted driving wheels, could maintain of steam pressure and weighed . Campbell's locomotive was estimated to be able to pull a train of at on level track, outperforming the strongest of Baldwin's s in tractive effort by about 63%. However, the frame and driving gear of his locomotive proved to be too rigid for the railroads of the time, which caused Campbell's prototype to be derailment-prone. The most obvious cause was the lack of a weight equalizing system for the drivers.

At about the same time as Campbell was building his 4-4-0, the company of Eastwick and Harrison was building its own version of the 4-4-0. This locomotive, named ''Hercules'', was completed in 1837 for the Beaver Meadow Railroad. It was built with a leading bogie that was separate from the locomotive frame, making it much more suitable for the tight curves and quick grade changes of early railroads. The ''Hercules'' initially suffered from poor tracking, which was corrected by giving it an effective springing system when returned to its builder for remodeling.

Even though the ''Hercules'' and its successors from Eastwick and Harrison proved the viability of the new wheel arrangement, the company remained the sole builders of this type of locomotive for another two years. Norris Locomotive Works built that company's first 4-4-0 in 1839, followed by Rogers Locomotive & Machine Works, the Locks & Canals Machine Shop and the Newcastle Manufacturing Company in 1840. After Henry Campbell sued other manufacturers and railroads for infringing on his patent, Baldwin settled with him in 1845 by purchasing a license to build .

As the 1840s progressed, the design of the 4-4-0 changed little, but the dimensions of a typical example of this type increased. The boiler was lengthened, drivers grew in diameter and the firegrate was increased in area. Early were short enough that it was most practical to connect the pistons to the rear drivers, but as the boiler was lengthened, the connecting rods were more frequently connected to the front drivers.

In the 1850s, locomotive manufacturers began extending the wheelbase of the leading bogie and the drivers as well as the tender bogies. By placing the axles farther apart, manufacturers were able to mount a wider boiler completely above the wheels that extended beyond the sides of the wheels. This gave newer locomotives increased heating and steaming capacity, which translated to higher tractive effort. Similarly, by placing the leading bogie axles further apart enabled the cylinders to be placed between them in a more horizontal orientation, thereby distributing the engine's weight more evenly when going around curves and uneven track. These advancements, combined with the increasingly widespread adaptation of cowcatchers, bells, and headlights, gave the 4-4-0 locomotives the appearance for which they are most recognized.

The design and subsequent improvements of the 4-4-0 configuration proved so successful that, by 1872, 60% of Baldwin's locomotive construction was of this type and it is estimated that 85% of all locomotives in operation in the United States were s. However, the 4-4-0 was soon supplanted by bigger designs, like the and , even though the 4-4-0 wheel arrangement was still favored for express services. The widespread adoption of the and larger locomotives eventually helped seal its fate as a product of the past.

Although largely superseded in North American service by the early 20th century, Baldwin Locomotive Works produced two examples for the narrow gauge Ferrocarriles Unidos de Yucatán in early 1946, probably the last engines of this wheel arrangement intended for general use. A number of individual engines have been custom-built for Theme Parks in recent years, resembling early designs in appearance.

British development

The first British locomotives to use this wheel arrangement were the broad gauge 4-4-0 tank engine designs which appeared from 1849. The first British tender locomotive class, although of limited success, was the broad gauge ''Waverley'' class of the Great Western Railway, designed by Daniel Gooch and built by Robert Stephenson & Company in 1855.

The first American-style British 4-4-0 tender locomotive on , designed by William Bouch for the Stockton & Darlington Railway in 1860, followed American practice with two outside cylinders.

Britain's major contribution to the development of the 4-4-0 wheel arrangement was the inside cylinder version, which resulted in a steadier locomotive, less prone to oscillation at speed. This type was introduced in Scotland in 1871 by Thomas Wheatley of the North British Railway.

Use

Australia

The first appeared in South Australia in 1859. From that initial order for two locomotives, the numbers of this wheel arrangement multiplied and eventually appeared in most of the Australian colonies. Tender, tank and saddle tank versions, varying in size from small engines to express passenger racers with driving wheels, worked in Victoria, New South Wales, Western Australia and Tasmania on gauge, and
gauge.Oberg, Leon. (1975). ''Locomotives of Australia''. Sydney, London: Reed.

The locomotives originally from British builders such as Dübs & Company and Beyer, Peacock & Company, however, from late 1870's into the 1880s, railways also bought locomotives from American builders, mostly from Baldwin, as well as a few examples bought from the Rogers Locomotive & Machine Works in New Jersey. From the 1880s onward, local firms such as James Martin & Co. in Gawler, South Australia, and the Phoenix Foundry in Ballarat, Victoria would also build examples. In New South Wales and Victoria, the 4-4-0 ruled the rails for mainline passenger services until the early 1900s. In Western Australia, some were later converted to s.

Finland

In Finland, the 4-4-0 was represented by the Classes A1, A2, A3, A4, A5, A6 and A7.
* The Class A4 was a class of nine locomotives, built in 1872 and 1873 by the Baldwin Locomotive Works for use on the Hanko–Hyvinkää railway.
* The Finnish Steam Locomotive Class A5 was a class of only two locomotives, built in 1874 and 1875 by the Finnish State Railroad's workshops in Helsinki. One of them is preserved at the Finnish Railway Museum.

Indonesia

The 4-4-0 two cylinder compound tender locomotives began to set its step on Java in 1900s. The '' Staatsspoorwegen'' (SS) ordered 44 of these from 3 different manufacturers, they were from Hanomag, Sächsische Maschinenfabrik (Hartmann) and Werkspoor and they were imported in 1900–1910.

After they had already arrived in Java, they were classified as SS Class 600 with 1,503 mm driving wheels which way much bigger than any operational SS locomotives at the time and used as the main workhorse for express trains. The SS 600s could be found hauling local trains in Tanah Abang– Rangkasbitung– Merak/Labuan, Madiun– Kertosono– Blitar and Babat– Jombang lines. Some of them were also found in Maos– Kroya– Kutoarjo and Surabaya– Pasuruan lines. Then, the SS sent their five SS 600s to South Sumatra due to the increasing needs of railway transport in there. These locomotives were withdrawn from active service momentarily in 1929-1934 during great depression because of their cylinder compound technology which has a complicated mechanism system so the SS had to save its budget by preserving these locomotives, but they received extensive maintenance so they still could be used normally.

During Japanese occupation in 1942, all of private/state railway companies of the Dutch East Indies (now Indonesia) were renumbered based on Japanese numberings, without exception to SS Class 600s were renumbered to B51 and it still used after Indonesian Independence with their ''Djawatan Kereta Api'' (DKA) or Department of Railways of the Republic of Indonesia up to now. One unit of B51 was sent out again to West Sumatra to serve coal train transport in Muaro–Pekanbaru line till it closed in September, 1945. From 44 locomotives, only B51 12 (ex-SS 612) of Hanomag is preserved. Previously, B51 12 was a yard shunter of Bojonegoro railway station. The B51 12 was once a static display for more than 30 years at Ambarawa Railway Museum, before finally fully restored in 2012 to haul the Ambarawa excursion train for Ambarawa–Tuntang line beside the Esslingen B25 02 and 03 which were used on rack line between Jambu–Bedono.

Mozambique

Between 1895 and 1898, Pauling & Company placed 42 Falcon F2 and F4 4-4-0 tender locomotives in service on the narrow gauge railway which was being constructed for the Beira Railway in Mozambique. They were supplied in six batches by Falcon Engine & Car Works in England and the Glasgow Railway Engineering Company in Scotland.Baxter, Antony. ''The Two Foot Gauge Enigma'' (1st ed.). Plateway Press. pp. 37-45 & Appendix V. .Pattison, R.G. (2005). ''Thundering Smoke'', (1st ed.). Sable Publishing House.

In service, these locomotives were nicknamed ''Lawleys'' after the Beira Railway construction subcontractor. The construction of the last batch of ten F4 locomotives was subcontracted by Falcon to the Glasgow Railway Engineering Company in Scotland and these were consequently often referred to as the ''Drummond F4''.Railway Modelling Scene, South Africa, May/June 1985, article written by Neill Mardell

The Falcon F4 was larger and heavier than the earlier F2, with a tractive effort that was increased from the of the F2 to at 75% boiler pressure. It could haul up the ruling gradients, compared to the that the F2 could manage.

New Zealand

The NZR L^A class tank locomotives of 1887 were built in Britain by Nasmyth, Wilson & Company in 1887 for the New Zealand Midland Railway Company. They were taken over by the New Zealand Railways Department in 1900, when the government acquired the incomplete Midland line.

Rhodesia

When the Beira Railway in Mozambique was regauged to by 1900 and the whole 4-4-0 Lawley locomotive fleet was staged, six of the Mozambican F4 locomotives were acquired by the Ayrshire Railway, which was then under construction in Southern Rhodesia. They remained in service there until 1914, when this line was also converted to Cape gauge and became the Sinoia branch of the Beira, Mashonaland and Rhodesia Railway.

South Africa

Narrow gauge

In 1907 and 1910, the Tongaat Sugar Estates in Natal acquired two 4-4-0 tank locomotives from WG Bagnall for their gauge line. These locomotives had cylinders. A further eleven similar locomotives, but with cylinders, were delivered from the same manufacturer between 1926 and 1946.

In 1915, thirteen of the Beira Railway's retired narrow gauge Falcon F2 and F4 locomotives were acquired from Mozambique by the Union Defence Forces for use in South Africa, where they replaced locomotives that had been commandeered for the war effort in German South West Africa during World War I. At the end of the war, these locomotives were staged until they were placed back in service by the South African Railways (SAR) in 1921. When a system of grouping narrow gauge locomotives into classes was eventually introduced by the SAR between 1928 and 1930, they were classified as Class NG6.

In 1936, Bagnall built a single 4-4-0 tank locomotive, named ''Burnside'' and with cylinders, for the gauge line of the Natal Estates sugar plantation at Mount Edgecombe in Natal.

Standard gauge

The third locomotive of the Natal Railway Company was delivered in January 1876, sixteen years after the opening of the railway. It was a 4-4-0 side tank engine, built by Kitson & Company and named ''Perseverance''. This was the last standard gauge locomotive to be obtained by the Natal Railway Company before the establishment of the Natal Government Railways in 1877 and the conversion from Standard gauge to .''The Natal Mercury'' of 12 January 1876.

Cape gauge

Seven side-tank locomotives were built for the Cape Government Railways (CGR) by Robert Stephenson & Company in 1875. Since they were found to be fast and reliable engines, four more were delivered in 1880, built by Neilson & Company and practically identical to the previous seven, but equipped with small optional four-wheeled water tenders. They were all designated 1st Class when a locomotive classification system was introduced by the CGR.''C.G.R. Numbering Revised'', Article by Dave Littley, SA Rail May–June 1993, pp. 94-95.

In 1879, the Cape Government Railways placed four 1st Class tender locomotives in service, built by the Avonside Engine Company. They were intended for fast passenger service on the Cape Western and Eastern systems and were followed by eleven more from Neilson & Company in 1880.

In 1881, the CGR placed six more 1st Class tank-and-tender locomotives in service on its Cape Midland system. These were built by Neilson & Company as tender locomotives without on-board coal bunkers and with permanently attached coal and water tenders. Two of them became SAR Class 01 in 1912.

Between 1882 and 1891, eleven tank locomotives for the Wynberg suburban line in Cape Town were delivered to the CGR from Neilson and Dübs & Company. Designated 2nd Class and known as ''Wynberg Tanks'', ten of them became SAR Class 02 in 1912.

In 1882, two tank locomotives named ''Grahamstown'' and ''Bathurst'' entered passenger service on the private Kowie Railway between Grahamstown and Port Alfred, which was still under construction at the time.

Eighteen tender passenger locomotives were delivered to the CGR from Neilson & Company in 1883, designated 3rd Class. They were ordered for passenger service out of Cape Town, East London and Port Elizabeth respectively and were equipped with six-wheeled tenders.

In 1884, the CGR placed two experimental 3rd Class tender locomotives in service, designed by the Cape Eastern System to be able to use the low-grade local coal with its high incombustible matter content.

In 1889, the CGR placed 24 3rd Class tender locomotives in service. They were the first stock locomotives to be built in quantity to detailed designs prepared in the Cape of Good Hope.

In 1898, the CGR placed six 3rd Class ''Wynberg Tender'' locomotives in passenger service on the suburban lines in Cape Town.

In 1901, the CGR placed another six 3rd Class ''Wynberg Tender'' locomotives in suburban service in Cape Town. They were a heavier and more powerful version of the locomotives of 1898 and were built for speed, with the largest coupled wheels of any locomotive on the CGR to date at diameter.

In 1903, the CGR placed the last eight 3rd Class ''Wynberg Tenders'' in suburban service in Cape Town. While they appeared to be virtually identical to the locomotives of 1901 at first glance, they were heavier and more powerful.

United Kingdom

Tank locomotives

4-4-0T classes began to appear on broad-gauge lines in the United Kingdom from 1849. The Great Western Railway built its ''Bogie'' class saddle tanks for the South Devon Railway in 1849, and others for its own use during 1854 and 1855. Between 1851 and 1876, the South Devon Railway acquired a further six saddle tank classes, and the Vale of Neath Railway a further nine. The Bristol and Exeter Railway introduced several 4-4-0ST classes after 1855.

William Adams built a series of standard gauge 4-4-0T classes for the North London Railway between 1863 and 1876. He went on to build the LSWR 46 Class for the London & South Western Railway in 1879. Other British 4-4-0T types included the A Class of the Metropolitan Railway, built by Beyer, Peacock & Company from 1864, and the Highland Railway O Class of 1878 and P class of 1893–94. Also in 1864, John Lambie of the Caledonian Railway built twelve Class 1 4-4-0T locomotives.

Inside cylinder tender locomotives

Between 1876 and 1903, Samuel Johnson of the Midland Railway built 350 inside cylinder tender locomotives to various designs, notably the Midland Railway 483 Class. The type was particularly refined by John F. McIntosh of the Caledonian Railway with his ''Dunalastair'' and ''Breadalbane'' classes of 1896 to 1898. In addition, Wilson Worsdell of the North Eastern Railway designed six classes between 1896 and 1909. Other notable classes included the London & South Western Railway’s T9 class of 1899 and the London & North Western Railway’s ''Precursor'' Class of 1904.

From the mid-1890s until after World War I, the inside cylinder 4-4-0 was the standard type for British Express passenger trains, although several classes were also used in mixed-traffic service in later years.

The Great Western Railway (GWR) preferred to retain outside frames on their inside cylinder 4-4-0s. One member of its ''City'' class, the ''City of Truro'', designed by George Jackson Churchward and built at the GWR's Swindon Works in 1903, was reputedly the first steam locomotive in Europe to travel in excess of , reaching a speed of on 9 May 1904 while hauling the ''Ocean Mails'' special from Plymouth to London Paddington.

Although the inside cylinder 4-4-0 had largely been superseded by larger locomotives for mainline express trains by 1920, the type remained in use in Scotland and East Anglia, where lines that could not support heavier or larger locomotives were common. Thus both the Great Eastern Railway’s ''Claud Hamilton'' classes of 1900 to 1911 and the Great Central Railway’s ''Director'' classes of 1920 were perpetuated by the London & North Eastern Railway in 1923. Until 1932, the London, Midland & Scottish Railway also continued to build its Class 2P of traditional inside cylinder for secondary passenger working.

Three-cylinder tender locomotives

Experiments were conducted with three-cylinder compound locomotives by Wilson Worsdell of the North Eastern Railway in 1898, Samuel Johnson of the Midland Railway in 1901 and Francis Webb of the London and North Western Railway. Of these, the development of Johnson's design by Richard Deeley of the Midland Railway into the 1000 Class was the most successful. This class continued to be built by the London, Midland and Scottish Railway (LMS) after 1905, until 1932 with the almost identical LMS Compound 4-4-0.

British three-cylinder simple expansion (simplex) locomotives included Nigel Gresley's LNER Class D49 ''Hunt'' and ''Shire'' 4-4-0s of 1927–28. However, the most powerful and one of the most successful 4-4-0 designs ever constructed was the ''Schools'' class of the Southern Railway, designed by Richard Maunsell and built between 1930 and 1935. These were used on secondary express trains between London and South Coast towns, until their withdrawal in 1962.

United States

Since the first locomotives in the United States were imported from the United Kingdom, the British was also adopted by the first United States railroads. When new locomotive construction began in the United States in 1831, some new railroads opted for a different gauge, resulting in breaks-of-gauge as railroads began to be joined. Apart from freight reloading issues, another result was that new locomotives for some of these railroads had to be delivered on flatcars.

The 4-4-0 played a major role in the development of rail transport in the United States. Some of the notable 4-4-0 locomotives that saw service on United States railroads are:

* Philadelphia and Reading Railway Company No.3, built in 1842 by Eastwick & Harrison in Philadelphia, Pennsylvania, is one of the oldest surviving locomotives of the 4-4-0-wheel arrangement, and the sole surviving 4-4-0 of the Reading Company.
* The ''General'', built in 1855 by Rogers, Ketchum & Grosvenor in Paterson, New Jersey

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