West Somerset Railway

No 1 & 2 (works number 578 & 579)

Royal Ordnance Factory No. 1 and 2

Number 578  & 579 (ROF 1 & 2) are a pair of diesel-hydraulic shunting locomotives that were introduced to the Royal Ordnance Factory (ROF) in Puriton, near Bridgwater in 1972 as replacements for existing lower-powered locomotives that were unable to haul works trains over the gradients associated with the bridge that had been built over the brand new M5 motorway, just north of junction 23. Both locomotives were loaned to the WSR by ROF parent company BAE Systems when the works closed in the ‘90s, with the formal ownership transferring to the WSR as recently as 2019.

Both locomotives are in operational condition although ROF 1 requires attention to bodywork corrosion and a full repaint. Sister loco number 579 (ROF 2) has already been restored and has been in regular use at Minehead for many years. Both locos are capable of running in multiple but are air-braked with no vacuum brake capability, so their use on the WSR is restricted. However, the short length and mighty tractive effort of these Paxman-engined locos makes them a very good fit for pilot duties within a crowded yard.

Technical Specification

Engine: Paxman 6-cylinder V-type 6RPHL Mk 7, non-turbocharged.

Transmission: Hydraulic. British Twin Disc CF11500 torque converter, Self-Changing Gears Ltd reverse and reduction gear unit.

Weight: 35.6 Tons (36 tonnes)

Length: 24 ft 3 inches (7.5m)

Output: 302 hp at 1,500 rpm

BR Power Rating: Not Applicable

Speed: 15 mph max

Fuel Capacity: 200 gallons (908 litres)

Wheels: 0-4-0 wheelbase 6 ft (1.8m)



Manufacturer: Andrew Barclay, Kilmarnock, Scotland

BR Class: Not Applicable

Introduced: 1972

Number Built: 2

Role: Industrial shunting duties

Both locomotives are owned by the West Somerset Railway plc. ROF 2 is based at Minehead. ROF 1 is based at Williton and is in the care of the Diesel & Electric Preservation Group.