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A Garratt locomotive is a type of 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.
The Australian Standard Garratt (ASG) was a Garratt locomotive designed in Australia during World War II, and used on 3 ft 6 in narrow gauge railway systems in Queensland, South Australia, Western Australia and Tasmania.
Under the Whyte notation for the classification of steam locomotives, 2-6-0+0-6-2 represents the wheel arrangement of an articulated locomotive with two separate swivelling engine units, arranged back to back with the boiler and cab suspended between them. Each engine unit has two leading wheels in a leading truck, six powered and coupled driving wheels on three axles and no trailing wheels.
The Tasmanian Government Railways (TGR) was the former operator of the mainline railways in Tasmania, Australia. Formed in 1872, the railway company was managed by the Government of Tasmania, and existed until absorption into the Australian National Railways Commission in 1978.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 0-4-0+0-4-0 is an articulated locomotive of the Garratt type. The wheel arrangement is effectively two 0-4-0 locomotives operating back-to-back or face-to-face, with the boiler and cab suspended between the two power units. Each power unit has no leading wheels, four powered and coupled driving wheels on two axles and no trailing wheels. A similar arrangement exists for Mallet and Meyer locomotives, but is referred to as 0-4-4-0.
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 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, a 4-4-2+2-4-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-4-2 locomotives operating back to back, with each power unit having four leading wheels on two axles in a leading bogie, four powered and coupled driving wheels on two axles, and two trailing wheels on one axle in a trailing truck. Since the 4-4-2 type is usually known as an Atlantic, the corresponding Garratt type is often referred to as a Double Atlantic.
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 Dm class was a class of 4-6-4T tank locomotive operated by the Western Australian Government Railways (WAGR) between 1945 and 1971.
The Tasmanian Government Railways G class was a class of 0-4-2T steam locomotives operated by the Tasmanian Government Railways.
The Tasmanian Government Railways M class is a class of 4-6-2 steam locomotives operated by the Tasmanian Government Railways.
The Emu Bay Railway was a Tasmania, Australian railway company. The railway was significant during full operation, in that it linked the Tasmanian Government Railways system at Burnie with that at Zeehan that further linked to the Mount Lyell railway allowing connection through to Queenstown.
The South Australian Railways T class was a class of 4-8-0 steam locomotives operated by the South Australian Railways. Several were sold to the Tasmanian Government Railways; some others operated on the Commonwealth Railways.
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 WAGR M class was a class of 2-6-0+0-6-2 Garratt-type articulated steam locomotives operated by the Western Australian Government Railways (WAGR) between 1912 and 1955. A total of 13 of them were built by Beyer, Peacock & Co, Manchester in two batches.
The Tasmanian Government Railways M class was a class of 4-4-2+2-4-4 Garratt steam locomotives operated by the Tasmanian Government Railways.
References
- ↑ Turner, Jim (1997). Australian Steam Locomotives 1896-1958. Kenthurst: Kangaroo Press. p. 59. ISBN 086417778X.
- ↑ Oberg, Leon (2010). Locomotives of Australia 1850s-2010. Dural: Rosenberg Publishing. pp. 152/153. ISBN 9781921719011.
- ↑ "Steam Locomotives of the Tasmanian Government Railways and its Constituents" Australian Railway History issue 917 March 2014 page 9