The Janus
The Janus locomotive was of 0-6-0 wheel arrangement, diesel-electric, weighed 48 tons and had a maximum speed of 23 mph (37 km/h). The two Rolls-Royce C6SFL diesel engines gave a total power output of 400 hp (300 kW). The locomotive demonstrated on British Railways was the second of this type built (works number 2595/56), both the first two locomotives being demonstrated to potential customers before going to the Appleby-Frodingham Steelworks in Scunthorpe. It is thought to have been in use there until being scrapped in 1982.
Eventually just short of 100 Janus locomotives were built (one even being built for operation in India), some of which were still in industrial use in 2005.
The name Janus is from the two-faced god Janus: the locomotive was symmetrical with two 'faces'. The similarity in power and speed would indicate that this type of locomotive could have been use in a similar role to the British Rail Class 08 shunter. In recent years Class 08 shunters owned by EWS have replaced Janus locomotives on some industrial railways.
Read more about this topic: Yorkshire Engine Company Janus