The

Yorkshire Engine Company The Yorkshire Engine Company (YEC) was a small independent locomotive manufacturer in Sheffield, England. The company was formed in 1865 and produced locomotives and carried out general engineering work until 1965. It mainly built shunting engi ...

Half Janus is a 0-6-0 wheel arrangement, diesel electric

shunting locomotive A switcher, shunter, yard pilot, switch engine, yard goat, or shifter is a small railroad locomotive used for manoeuvring railroad cars inside a rail yard in a process known as ''switching'' (US) or ''shunting'' (UK). Switchers are not inten ...

which weighs 31 long tons with a maximum speed of 20 mph. The Half Janus was built by the Yorkshire Engine Company in Sheffield between 1956 and 1965. Each locomotive was built (out of the factory) with one

Rolls-Royce C6SFL The Rolls-Royce ''C range'' was a series of in-line 4, 6 and 8 cylinder diesel engines used in small diesel locomotive, railway locomotives, Heavy equipment (construction), construction vehicles, marine and similar applications. They were manufac ...

engine which was paired with one generator to power the

British Thomson-Houston British Thomson-Houston (BTH) was a British engineering and heavy industrial company, based at Rugby, Warwickshire, England, and founded as a subsidiary of the General Electric Company (GE) of Schenectady, New York, United States. They were kno ...

traction motor mounted to the wheel set at the back of the locomotive under the cab. The locomotive was nicknamed the Half Janus because it had half the power and body of the

Yorkshire Engine Company Janus The Yorkshire Engine Company Janus is a line of 0-6-0 wheel arrangement, diesel-electric locomotives that weighed and had a maximum speed of . The two Rolls-Royce C6SFL diesel engines gave a total power output of . Each engine had its cooling ...

. The Janus locomotive has two bonnets and the Half Janus has one. The Yorkshire engine company Janus got its name from the two-faced god,

Janus In ancient Roman religion and myth, Janus ( ; la, Ianvs ) is the god of beginnings, gates, transitions, time, duality, doorways, passages, frames, and endings. He is usually depicted as having two faces. The month of January is named for Janu ...

Locomotives in preservation

Yorkshire Engine 2661 at Frodingham Platform 03-05-03

There is one example of a Half Janus at the Appleby Frodingham Railway Preservation Society based at the

Scunthorpe Steelworks The Iron and Steel Industry in Scunthorpe was established in the mid 19th century, following the discovery and exploitation of middle Lias ironstone east of Scunthorpe, Lincolnshire, England. Initially iron ore was exported to iron pro ...

North Lincolnshire North Lincolnshire is a unitary authority area in Lincolnshire, England, with a population of 167,446 in the 2011 census. The borough includes the towns of Scunthorpe, Brigg, Haxey, Crowle, Epworth, Bottesford, Kirton in Lindsey and Barton ...

, another at

Rocks by Rail Rutland Railway Museum, now trading as Rocks by Rail: The Living Ironstone Museum, is a heritage railway on part of a former Midland Railway mineral branch line. It is situated north east of Oakham, in Rutland, England. Overview The museum of ...

and a third at the South Devon Railway. One example is 'Arnold Machin', which was brought into preservation at the society from Eccles Slag Co., Ltd. The locomotive served at Scunthorpe Steelworks, Normanby Park Works run by United Steel Company at the time. 'Arnold Machin' was built with the works number '2661' in 1958. The locomotive is currently being overhauled at the society sheds. 'Arnold Machin' has a twin sister which is now located at Rocks by Rail, Loco '1382'. It is currently preserved in its Colsterworth Mines, United Steel Company Maroon livery. Loco '1382' spent most of its working life at the Colsterworth Quarries. When this closed it moved to the Scunthorpe Steelworks Normanby Park Works site until the Normanby Park Works was closed in the 1990s. The locomotive was then preserved at

. It moved to the Appleby Frodingham Railway Preservation Society in May 2015 to be overhauled. The locomotive then moved to Peak Rail in August 2016, along with two other locomotives owned by Andrew Briddon. After the overhaul was completed in 2019, the locomotive moved back to Rocks by Rail where is regularly operates on open days.

References

{{reflist YEC locomotives C locomotives British Rail diesel locomotives Industrial diesel locomotives of Great Britain Shunting locomotives Standard gauge locomotives of Great Britain