Rhymney Railway S class

4 ft 8+1⁄2 in (1,435 mm) standard gaugeDriver dia.4 ft 6 in (1.372 m)Loco weightS 55.06–66.95 long tons (55.94–68.02 t); S1 56.08–66.95 long tons (56.98–68.02 t)Fuel typeCoalBoiler pressure175 lbf/in² (1.21 MPa);
Rebuilt: 200 lbf/in² (1.38 MPa)CylindersTwo, insideCylinder size18 in × 26 in (457 mm × 660 mm)

Performance figures
Tractive effort	S 23,870 lbf (106.2 kN); S1: 25,210 lbf (112.1 kN)

Career
Operators	RR, GWR, BR
Class	RR: S & S1
Power class	BR: 4F
Numbers	RR: 32-4, 111–4 GWR/BR: 78-83
Withdrawn	1954–5
Disposition	All scrapped

The Rhymney Railway S class was a class of 0-6-0T steam locomotives introduced into traffic in 1908 designed by the railway's engineer Hurry Riches. There were initially four locos in the class. A further 4 ‘S1’ locomotives with a larger boiler and higher tractive effort were built in 1920.

References

• Casserley, H. C. & Johnston, Stuart W. (1966). Locomotives at the Grouping 4: Great Western Railway. Shepperton, Middlesex: Ian Allan Limited. p. 9-6.

External links

• Rail UK database entry for Rhymney Railway S class
• Rail UK database entry for Rhymney Railway S1 class