A Garratt locomotive is a type of articulated steam locomotive invented by British engineer Herbert William Garratt that is articulated into three parts. Its boiler, firebox, and cab are mounted on a centre frame or "bridge". The two other parts, one at each end, have a pivot to support the central frame; they consist of a steam engine unit – with driving wheels, trailing wheels, valve gear, and cylinders, and above it, fuel and/or water storage.
The Tasmanian Government Railways K class was a class of 0-4-0+0-4-0 Garratt locomotives operated by the Tasmanian Government Railways from 1909 – the first Garratt locomotives built.
Indian Railways operates India's railway system and comes under the purview of the Ministry of Railways of Government of India. As of 2023, it maintains over 108,706 km (67,547 mi) of tracks and operates over 13,000 trains daily with a fleet of 14,800 locomotives. The railways primarily operates a fleet of electric and diesel locomotives along with a few compressed natural gas (CNG) locomotives. Steam locomotives are operated on mountain railways and on heritage trains.
The London and North Eastern Railway Class U1 was a solitary 2-8-0+0-8-2 Garratt locomotive designed for banking coal trains over the Worsborough Bank, a steeply graded line in South Yorkshire and part of the Woodhead Route. It was both the longest and the most powerful steam locomotive ever to run in Britain. It was built in 1925 with the motion at each end being based on an existing 2-8-0 design. The original number was 2395, and it was renumbered 9999 in March 1946, and then 69999 after nationalisation in 1948, although it retained its cab-side plate bearing its original number throughout its life. The locomotive ran for some time as an oil burner, and was tried out on the Lickey Incline in 1949–1950 and again, after the electrification of its home line, in 1955. These trials were unsuccessful, and so the locomotive was withdrawn in 1955 and scrapped.
The South African Railways Class GL 4-8-2+2-8-4 of 1929 was an articulated steam locomotive.
The South African Railways Class NG G13 2-6-2+2-6-2 of 1927 are a class of narrow gauge articulated steam locomotives.
The South African Railways Class NG15 2-8-2 is a class of narrow-gauge steam locomotives.
The Victorian Railways G class is a class of steam locomotives built for the Victorian Railways 2 ft 6 in gauge branch lines by Beyer, Peacock & Company. They were introduced in 1926 to increase train sizes, eliminate the practice of double heading NA locomotives and reduce losses on these lines. Their tractive effort was comparable to the most powerful branch line locomotives on the Victorian Railways 5 ft 3 in, the K class.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, a 4-8-2+2-8-4 is a Garratt articulated locomotive consisting of a pair of 4-8-2 engine units back to back, with the boiler and cab suspended between them. The 4-8-2 wheel arrangement has four leading wheels on two axles, usually in a leading bogie, eight powered and coupled driving wheels on four axles and two trailing wheels on one axle, usually in a trailing truck. Since the 4-8-2 type is generally known as a Mountain, the corresponding Garratt type is usually known as a Double Mountain.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-8-0+0-8-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-8-0 locomotives operating back to back, with the boiler and cab suspended between the two engine units. Each engine unit has two pairs of leading wheels in a leading bogie, followed by four coupled pairs of driving wheels and no trailing wheels. A similar wheel arrangement exists for the Union Pacific Big Boy, but is referred to as 4-8-8-4 since only the front engine unit swivels.
The X200 class were a class of rail tractors introduced in 1963 and operated by the New South Wales Government Railways of Australia. They were a development of the smaller and less numerous X100 class. The X200 class remained in service until 1990 when they were either withdrawn or sold off to private companies, and some remain operational today.
The New South Wales AD60 class were Beyer-Garratt patent articulated four-cylinder, simple, non-condensing, coal-fired superheated, 4-8-4+4-8-4 heavy goods steam locomotives built by Beyer, Peacock & Company for the New South Wales Government Railways in Australia.
The WAGR W class is a class of 4-8-2 steam locomotives operated by the Western Australian Government Railways (WAGR) between 1951 and 1972.
The WAGR S class was a class of 4-8-2 steam locomotives built by the Midland Railway Workshops between 1943 and 1947 and operated by the Western Australian Government Railways (WAGR).
The WAGR V class was the last class of steam locomotive to enter service with the Western Australian Government Railways (WAGR). The class was part of the post war regeneration plan for the WAGR, intended for the heavy coal traffic between the Collie coal fields and Perth.
The South African Railways Class NG G11 2-6-0+0-6-2 of 1919 is a class of narrow gauge steam locomotives.
The EAR 59 class is a class of oil-fired 1,000 mm gauge 4-8-2+2-8-4 Garratt-type articulated steam locomotives. The 34 members of the class were built by Beyer, Peacock and Company in Manchester, England, for the East African Railways (EAR). They entered service in 1955–56, and were the largest, heaviest and most powerful steam locomotives to operate on any metre gauge railway in the world.
The Queensland Railways Beyer-Garratt class locomotive was a class of 4-8-2+2-8-4 steam locomotives operated by the Queensland Railways.
The South African Railways Class GMA 4-8-2+2-8-4 of 1954 is an articulated steam locomotive.
6029 is a four-cylinder, simple, non-condensing, superheated, articulated 4-8-4+4-8-4 Garratt steam locomotive, of the AD60 class, built by Beyer, Peacock & Company, Manchester, England, for the New South Wales Government Railways.
