Garratt locomotive

In 1907, Beyer, Peacock and Company submitted a proposal for a 2 ft (610 mm) gauge 0-4-0+0-4-0 Garratt to the New South Wales Government Railways, which was not proceeded with. The following year a design for a 2 ft gauge Mallet locomotive was submitted in reply to an enquiry from the Government of Tasmania. The company then proposed a Garratt design based on, but a little heavier than, the design for New South Wales, with capacity to negotiate curves of 99 ft (30.18 m) radius and 1 in 25 gradients.[9][10] The proposal was accepted, and two locomotives were built in 1909, which became the K class.[11]

The Tasmanian Railways stipulated two features that were not in Herbert Garratt's original concept. The first was a compound configuration in which two high-pressure cylinders were on the rear engine unit and a pipe led to two larger, low-pressure cylinders on the front engine unit. The second was to have the cylinders facing inwards, which would reduce the distances between both the main steam pipe and the high-pressure cylinders and between the high-pressure and low-pressure cylinders.[12] The latter feature made the locomotive unnecessarily complicated and placed the high-pressure cylinders directly underneath the cab, making it uncomfortably hot for the crew on the rare days when Tasmania's West Coast Range was warm. Only one more Garratt locomotive was produced with compound propulsion (by Beyer, Peacock & Co. in 1927 for Burma Railways).[13] The company built no more Garratts with inward-facing cylinders, but two Garratts operated by the Southern Fuegian tourist railway at Ushuaia in Argentina, largely based on the K class, have that feature.[7][note 2]

Early design and construction difficulties involved the steam-tight flexible connections between the boiler unit and the power units. However, Beyer, Peacock's engineers solved them after studying a description of the spherical steam joints used on a Fairlie locomotive.[15]

The third Garratt (another 0-4-0+0-4-0, like the first two) was built in 1910 for the Darjeeling Himalayan Railway and given the class letter "D". The power output was intended to be double that of the line's existing 0-4-0ST locomotives, but only a 65% increase in loading was achieved.[16]

In 1911, Beyer, Peacock & Company built six 2-6-0+0-6-2 Garratts for the Western Australian Government Railways. The M class were followed by the Ms class and the Msa class. These locomotives formed the pattern for the Victorian Railways narrow gauge G class and the Australian Portland Cement Garratts.[8]

Class NG G16 no. NG115

Beyer, Peacock built more than a thousand Garratt or Beyer-Garratt locomotives.[17][note 3] The final built to a Beyer-Peacock design, in 1967–1968, were eight 2 ft (610 mm) gauge South African Railways Class NG G16 locomotives.[note 4]

The following list shows known Garratt construction by all manufacturers.[19][20][21]

South African Class GMAM Garratt

The Garratt was most widely used in Africa:[8] large numbers were in South Africa, Rhodesia (now Zimbabwe) and Algeria, and smaller numbers in Angola, Congo, Ghana, Ivory Coast, Kenya, Libya, Madagascar, Mozambique, Nigeria, Senegal, Sierra Leone, Sudan, Uganda and Zaïre.

In Algeria, 29 4-6-2+2-6-4 Garratts, constructed between 1936 and 1941 by the Société Franco-Belge de Matériel de Chemins de Fer at Raismes in Northern France, operated until the Algerian independence war caused their withdrawal in 1951. This class, designated 231-132BT, was streamlined and featured Cossart motion gear, mechanical stokers and 1.8 m (5 ft 11 in) driving wheels, the largest of any Garratt class. On a test in France, one of these achieved a speed of 132 kilometres per hour (82 mph)—a record for any Garratt class (and indeed any articulated class).[5]

All three main railways in Angola used Garratts. The largest user was the 3 ft 6 in (1,067 mm) gauge Caminho de Ferro de Benguela. Forty-eight were purchased from Beyer, Peacock between 1926 and 1956. They came in four batches: class 10A (301–306); class 10B (311–324) in 1930; class 10C (331–348) in 1954; and class 10D (361–370).

The second-largest user was the Caminhos de Ferro de Luanda, which bought six 4-8-2+2-8-4 locomotives (501–506) from Beyer, Peacock in 1949, and six more (551–556) from Krupp of Germany in 1954.

The third user was the Caminhos de Ferro de Moçâmedes, who bought six 4-8-2+2-8-4 locomotives (101–106) from Henschel & Son of Germany.

Garratts operated on 3 ft 6 in (1,067 mm) gauge through trains from South Africa to Rhodesia.

Kenya and Uganda Railways and Harbours, which operated railways in British East Africa and the Uganda Protectorate from 1929 to 1948, acquired 77 Garratts between the same years. The Tanganyika Railway also acquired 3 in 1928. In 1948, the railways merged to form the East African Railways and Harbours Corporation, commonly known in the railways context as East African Railways, shown by the letters "EAR" on rolling stock.

In addition to the 80 acquired Garratts, East African Railways operated 63 that it purchased new between 1954 and 1956, making a total of 143. More details are in the following table.

The East African Railways 4-8-2+2-8-4 59 class Garratts were the largest and most powerful steam locomotives to run on metre gauge, having a large 70-square-foot (6.5-square-metre) grate and a tractive effort of 83,350 pounds-force (370.76 kilonewtons). The 34 oil-fired locomotives remained in regular service until 1980. As of 2020, the Nairobi Railway Museum held two of them.[6]

4-6-4+4-6-4 and 4-8-2+2-8-4 Garratts operated in Mozambique, some built as late as 1956.[22]

Locomotive no. 405 (15th class, Zambia Railways, formerly 15th class Rhodesia Railways) at Ndola, Zambia, in 1968

Rhodesia imported 246 3 ft 6 in (1,067 mm) gauge Garratts of four different wheel arrangements: 2-6-2+2-6-2s of the 13th, 14th and 14A classes; 4-6-4+4-6-4s of the 15th class, 2-8-2+2-8-2s of the 16th, 16A, and 18th classes; and 4-8-2+2-8-4s of the 20th and 20A classes. Many went to Zambia Railways in 1967 when Rhodesia Railways surrendered the lines in Zambia to its government. Zimbabwe's economic and political situation has extended the life of its Garratts. Five Garratts, including some from the Zimbabwe National Railway Museum, were returned to service in 2004–05 to haul commuter trains. As of 2011 they were performing shunting duties around the city of Bulawayo.[23][24]

On the Sierra Leone Government Railway, this 2 ft 6 in (762 mm) gauge system had 2-6-2+2-6-2 Garratts starting in the 1920s and in the middle 1950s purchased 14 4-8-2+2-8-4 Garratts.

In 1921, the South African Railways held a comparative trial between three 3 ft 6 in (1,067 mm) locomotives: a class 14B 4-8-2 tender engine; a class MH Mallet 2-6-6-2, and a newly arrived class GA Garratt 2-6-0+0-6-2 – the first Garratt of that gauge to enter service in South Africa. The trial was conducted on the line between Durban and Ladysmith, which had gradients as steep as 1 in 30 and curves as tight as 4.5 chains (91 metres) in radius. The Garratt proved the superior locomotive in all regards.[25][26]

The most powerful of all Garratts irrespective of gauge were the South African Railways' eight 3 ft 6 in (1,067 mm) gauge GL class locomotives of 1929–30, which delivered 89,130 lbf (396.47 kN) of tractive effort. They were all out of service by the late 1960s.[27] There was also a proposal for a quadruplex super Garratt locomotive with a 2-6-6-2+2-6-6-2 wheel arrangement for South African Railways, but this was never built.[28]

Beyer, Peacock-built no. NG128, c. 1951

On the two foot gauge lines in South Africa, several successive classes of Garratts were made, of which the NG G16 became the most powerful steam locomotive ever built for the gauge. Some of these were imported to Wales for the Welsh Highland Railway.

Sudan operated at least one 4-6-4+4-6-4 Garratt.[29]

Burma had 43 metre gauge Garratts. Five B class 2-8-0+0-8-2 Garratts went to the Burma Railway Company between 1924 and 1927, with seven more built by Krupp of Germany in 1929.[30] They were followed by 31 locomotives transferred from India for War Department service: ten 2-8-0+0-8-2 locomotives, class GB (ex-Indian class MWGL); twelve 2-8-2+2-8-2 locomotives of class GC (ex-Indian class MWGH); and nine 4-8-2+2-8-4 locomotives of class GD (ex-Indian class MWGX).[31][32][33] A class of four 4-8-2+2-8-4 locomotives, the GE class, was built for Burma Railways in 1949,[33] but was diverted to the Assam Railway in India.[34]

Two 0-6-0+0-6-0 2 ft 6in gauge Beyer-Garratts were supplied to the Buthidaung-Maungdaw Tramway which became the Arakan Light Railway. BP works Nos. 5702 & 5703 of 1913 refer.[35]

Ceylon had 10 Garratts: an H1 class 2 ft 6 in (762 mm) 2-4-0+0-4-2 in 1924, a C1 class 5 ft 6 in (1,676 mm) 2-6-2+2-6-2 in 1927 and eight more C1 class 5 ft 6 in gauge 2-6-2+2-6-2s in 1945.[33][36]

Bengal Nagpur Railway 815, Class N (BP 6594 of 1930), at the National Rail Museum, New Delhi

India had 83 Garratts. One 5 ft 6 in (1,676 mm) gauge 2-6-2+2-6-2 was built for the Indian State in 1925.[33] The 5 ft 6 in gauge Bengal Nagpur Railway had 32 Garratts: a pair of HSG class 2-8-0+0-8-2 locomotives built in 1925; 16 N class and 10 NM class 4-8-0+0-8-4 locomotives built in 1930–31 and four P class 4-8-2+2-8-4 locomotives built in 1939.[33][37]

The metre gauge Assam-Bengal Railway had six T class 2-6-2+2-6-2 locomotives built in 1927. They later became the GT class on the Bengal Assam Railway. Three types of Garratt were supplied for war service on the BAR: ten MWGL class 2-8-0+0-8-2 locomotives; twelve MWGH 2-8-2+2-8-2 locomotives; and 18 MWGX class 4-8-2+2-8-4 War Department standard light Garratts. Of these, only nine MWGX stayed in India, with the remainder transferred to Burma.[31][33] After the war, the four Burma Railways GE class 4-8-2+2-8-4s were diverted to the Assam Railway.

The Trans-Iranian Railway had four 4-8-2+2-8-4 Garratts (class 86) built in 1936.[33]

Mauritius had three standard gauge 2-8-0+0-8-2 Garratts that were built in 1927.[33]

The Nepal Government Railway (NGR) had 2-6-2+2-6-2 Garratt locomotives manufactured by Beyer, Peacock and Company in 1932 and 1947.[19]

Preserved Garratt no.457 at Kanchanaburi railway station, Thailand

The Royal State Railway of Siam acquired 8 Garratts built by the German company Henschel during 1929–1937 for heavy freight duties in the Pak Chong highland areas. One has been preserved; it is displayed at Kanchanaburi railway station.

Turkish State Railways had just one standard gauge 2-8-0+0-8-2 Garratt that was built in 1927.[33]

Most states of Australia had sets of Australian Standard Garratt with varying degrees of success during the Second World War and for the decade after.[38][39]

Preserved former New South Wales Government Railways AD60 class no. 6029, City of Canberra, in 2016

New South Wales Government Railways introduced the 4-8-4+4-8-4 AD60 Garratt in 1952, built by Beyer, Peacock. The AD60 weighed 265 tonnes, with a 16-tonne axle loading. As delivered, it developed a tractive effort of 60,000 lbf (270 kN)), not as powerful as the South African Railways GMA/M 4-8-2+2-8-4 Garratts of 1954, which developed a tractive effort of 60,700 lbf (270 kN).[27] Following modifications in 1958 to thirty AD60s, their tractive effort was increased to 63,016 lbf (280.31 kN). These locomotives remained in service until the early 1970s with a replacement "6042" using the boiler cradle of 6043 (The original was scrapped in 1968) the last withdrawn in February 1973.[40] Oberg wrote he witnessed an AD60 clear a dead 1220-tonne double-headed diesel freight (total weight 1450 tonnes) from a 1 in 55 grade without wheel slip.[41] Four AD60's survive today: 6029 (which operates occasionally out of Thirlmere), 6039 (under private ownership at Dorrigo Museum), 6040 (on static display at THNSW, Thirlmere), & 6042 (also owned by the Dorrigo museum but sitting in the middle of a field in Forbes, NSW).

Queensland Railways operated 30 Beyer Garratt locomotives. These were mainly based in the Rockhampton area.[42]

The South Australian Railways 400 class

One of ten Garratts delivered in 1953 to the South Australian Railways – number 409 – is on static display at the National Railway Museum, Port Adelaide, South Australia. The locomotives were ordered in 1951 from Beyer, Peacock & Company, when there was a need for more and bigger motive power to haul the heavy ore trains on the 1,067 mm (3 ft 6 in) narrow-gauge line between Broken Hill and Port Pirie. The company subsequently subcontracted the order, with main specifications identical to those of the notable 60th class of the East African Railways, to Société Franco-Belge, its European associate based in Raismes.[43]

By 1955, the 400 class had taken over most of the working of the Broken Hill line. They operated as oil-burners, with provision for a mechanical stoker to be installed if converted to burn coal. They were also designed to be easily converted for service on either the broad or standard gauge. They were superseded by diesel power in 1963.[43]

Following the success of the K class Garratts on the North East Dundas Tramway, the Tasmanian Government Railways imported Beyer, Peacock Garratts for their main lines, in particular the 4-4-2+2-4-4 M class for express passenger work. These were the only eight-cylinder Garratts.[44] The M1 achieved a world speed record of 55 miles per hour (89 km/h) on 30 November 1912. Their 5-foot (1.5 m) diameter driving wheels were at the time the largest on any narrow-gauge locomotive in Australia.[45] Their eight cylinders proved a nightmare to maintain, and after several fatal and disastrous derailments in the late 1920s, mainly due to inadequate trackwork, they were withdrawn and scrapped.

Victorian Railways operated two Beyer Garratts, used on the Crowes and Walhalla narrow-gauge railway lines. The two engines were classified as G class, numbered G41 and G42; the latter engine has been restored. It is currently in use at the Puffing Billy Railway near Melbourne. It was not used in public service on that line prior to the preservation era. Fyansford Cement Works operated a 3'6" gauge line, with an ASG (G33) and 2 Garratts (No.1 and No.2) similar in design to the WAGR Ms class, although these 2 were not designated any class of their own. No.1 was scrapped but No.2 and G33 are preserved at the Bellarine Railway, with G33 currently undergoing restoration work.

A NZR G class Garratt locomotive

Beyer, Peacock built three 4-6-2+2-6-4 NZR G class locomotives in 1928, which were too powerful for the system and had complicated valve mechanisms. Unusually, these engines had three cylinders (24 in × 16.5 in or 610 mm × 420 mm) each, on two sets of engine frames, thus creating a six-cylinder Garratt; they were the second and final Garratts to employ this arrangement, the other being the one-off LNER U1. They entered service in 1929. Walschaerts valve gear operated the outside cylinders with the inner third cylinder linked by a Gresley conjugated valve gear. Photos verify the coal bunker was carried on an extension to the boiler frame rather than on the rear engine frame, as with most Garratts. The engines delivered 51,580 lbf (229.44 kN) of tractive effort, which was too powerful for the drawbars on the rolling stock. After a few years they were rebuilt as six Pacifics, also unsuccessful, but which saw nearly twenty years of service.[46]

Though no NZR Garratts survived, there are three preserved imported African Garratts in New Zealand. Rhodesia Railways class 15A No. 398 of the Flying 15 Trust, Pakakarakiki, class 14A No. 509 of Mainline Steam Trust Plimmerton (under restoration), and South African Railways GMAM class No. 4083 at Mercer Auckland with the Mainline Steam Trust awaiting restoration. When it first arrived in NZ in the 1990s, it was steamed and ran in their former Parnell Depot yard. See preservation below.

Garratts were mainly employed in Great Britain, Russia, and Spain, where some five railway companies employed seven classes. These included the 1931 order for Central of Aragon Railway for six 4-6-2+2-6-4 "Double Pacific" Garratts for fast passenger service. In addition a Dutch and a Belgian tramway also operated one or more engines based on and built to the Garratt design.

In 1931, the Dutch Limburgsche Tramweg Maatschappij (LTM) 'Limburg tramway company' ordered a single standard gauge Garratt, numbered LTM 51, from Henschel (Germany) with builder's number 22063. This design was slightly different in that the coal bunker was located on the boiler frame and both machines only holding the watertanks. More importantly, it was the only Garratt with inside cylinders. The wheel arrangement was C+C (0-6-0+0-6-0). Due to abandonment of the line in 1938, the locomotive was sold to a metal merchant, who in turn sold it to an engineers' bureau, that sold it in 1941 to Germany. Further whereabouts of this machine are unknown, but it is presumed scrapped.

Spain had a varied collection of Garratts from most builders; Beyer, Peacock themselves only building a pair of 3 ft 6 in (1,067 mm) 2-6-2+2-6-2s for Rio Tinto in 1929. The first Garratts in Spain, however, were four metre gauge 2-6-2+2-6-2s built for the Ferrocarriles Catalanes in 1922 by Sociéte Anonyme St. Leonard of Liége, Belgium. Four more followed in 1925. Also on the metre gauge, the Ferrocarril de la Robla bought two pairs of 2-6-2+2-6-2s, the first from Hanomag of Germany in 1929, the second from Babcock & Wilcox of Bilbao in 1931. The Compania Minera de Sierra Minera also bought a pair of metre-gauge 2-6-2+2-6-2s in 1930.

On the broad gauge, the Central of Aragon Railway bought six 2-8-2+2-8-2s from Babcock & Wilcox and six 4-6-2+2-6-4s from Euskalduna of Bilbao, both in 1931. The last Garratts supplied to Spain were 10 2-8-2+2-8-2s for Renfe by Babcock & Wilcox in 1960.

Builder's photo of Beyer-Garratt locomotive William Francis

WHR NG138 at Dinas, 2003

British usage of Garratts was minimal. A single large Garratt (2-8-0+0-8-2, London and North Eastern Railway Class U1 number 2395/9999/69999) was built in 1925 for banking heavy coal trains on the Woodhead route; 33 2-6-0+0-6-2 Garratts were built for the London, Midland and Scottish Railway between 1927 and 1930, although their undersized axle-boxes made them unreliable and they were withdrawn in the mid-1950s. They were also trialled unsuccessfully on the Lickey Incline between Bromsgrove and Birmingham.

Four standard-gauge Garratt locomotives were supplied by Beyer, Peacock for industrial service in the UK. One survived and is preserved at Bressingham Steam Museum. No. 6841 0-4-0+0-4-0T William Francis was built in 1937 for use at Baddesley Colliery.[47]

On the Welsh Highland Railway, a 1 ft 11+1⁄2 in (597 mm) narrow-gauge tourist line in Wales, a few imported South African NGG16 Garratts haul the greater part of service trains on the railway.

Soviet Ya.01 class 4-8-2+2-8-4 Garratt

Beyer, Peacock constructed the largest steam locomotive built in Europe, a 4-8-2+2-8-4 for the USSR, works order number 1176, in 1932. The locomotive had the Russian classification Ya.01 (Я.01). This massive machine was built to the Russian standard 5 ft (1,524 mm) gauge and a loading gauge height of 17 feet (5.2 m). It underwent extensive testing and proved to be very able to operate in extremely low temperatures, due to adequate protection of the external plumbing between boiler and engine units. This may have been the lowest temperature operation of a Garratt type. The locomotive was used for a number of years for coal traffic in the Donbass region, but was never replicated. This decision appears to be a combination of unfamiliar maintenance processes and politics.[48][49][50]

No Garratts appeared in North America, although the American Locomotive Company became the sole licensee to build Garratts there. Alco was unable to garner sufficient interest from US railroads to produce even a prototype or demonstrator. This reluctance was reportedly based on a concern that tractive effort and factor of adhesion would suffer as the weight of water and fuel over the driving wheels diminished.[4]

In 1975, one 2-6-2+2-6-2 Garratt NG class No. 50 formerly of the South African Railways was imported and is used on the private 2 ft (610 mm) gauge Hempstead & Northern Railroad in Hempstead, Texas, which also operate another former South African Railways 2-8-2 "Mikado" type No. 18.

The British-owned 5 ft 6 in (1,676 mm) gauge Buenos Aires Great Southern Railway operated twelve Garratt 4-8-2+2-8-4 oil-fired locomotives, numbers 4851–4862, built by Beyer, Peacock in 1929. They were used on the Bahía Blanca North Western section, particularly on the Toay line), on the main Bahía Blanca North Western line to General Pico, and between Tres Arroyos and Bahía Blanca. They were withdrawn in the 1950s due to the rapid decline in freight traffic caused by the increasing competition from road transport.[51]

Other British-owned railway companies in Argentina operated Garratt locomotives built by Beyer, Peacock:

• Argentine North Eastern Railway (4 ft 8+1⁄2 in (1,435 mm) gauge): seven 2-6-0+0-6-2 locomotives built 1925–1927 and three 4-4-2+2-4-4, built 1930
• Argentine Transandine (1,000 mm (3 ft 3+3⁄8 in) gauge): four 2-6-2+2-6-2, built 1930
• Buenos Aires and Pacific Railway (5 ft 6 in (1,676 mm) gauge): four 4-8-2+2-8-4, built 1929–1930
• Buenos Aires Midland Railway (1,000 mm (3 ft 3+3⁄8 in) gauge): two 4-6-2+2-6-4, 1930
• Cordoba Central Railway (1,000 mm gauge) : ten 4-8-2+2-8-4, built 1929
• Entre Rios Railway (4 ft 8+1⁄2 in (1,435 mm) gauge): five 2-6-0+0-6-2 and five 4-4-2+2-4-4, built 1927

The Southern Fuegian Railway at Ushuaia uses two 500 mm (19+3⁄4 in) gauge Garratts to haul tourist trains.

Three meter gauge 4-8-2+2-8-4 were delivered to the Antofagasta and Bolivia Railway in 1929, followed by six more in 1950.[52]

In Brazil after 1927, the São Paulo Railway operated broad-gauge 4-6-2+2-6-4] Garratts that ran passenger trains at 70 mph.[53]

In Colombia, one 914 mm (3 ft) gauge 4-6-2+2-6-4 Garratt was purchased by the FC Pacifico in 1924 and two more by the La Dorada in 1937.[54]

Four 2-8-2+2-8-2 standard gauge Garratts were delivered to the Central Railway of Peru from 1929 to 1931. (Donald Binns, The Central Railway of Peru and The Cerro de Pasco Railway, 1996)