| Rhymney Railway S and S1 classes |
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|---|---|
| Class S1 0-6-0T No. at Cardiff 1950 | |
| Power type | Steam |
| Designer | C. T. Hurry Riches |
| Build date | 1908–1920 |
| Total produced | 7 4(S), 3(S1) |
| Configuration | 0-6-0T |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver diameter | 4 ft 6 in (1 m) |
| Locomotive weight | S 55.06–66.95 long tons (55.94–68.02 t); S1 56.08–66.95 long tons (56.98–68.02 t) |
| Fuel type | Coal |
| Boiler pressure | 175 lbf/in² (1.21 MPa); Rebuilt: 200 lbf/in² (1.38 MPa) |
| Cylinders | Two, inside |
| Cylinder size | 18 × 26 in (457 × 660 mm) |
| Tractive effort | S 23,870 lbf (106.2 kN); S1: 25,210 lbf (112.1 kN) |
| Career | RR, GWR, BR |
| Class | RR: S & S1 |
| Power class | BR: 4F |
| Number | RR: 32-4, 111–4 GWR/BR: 78-83 |
| Withdrawn | 1954–5 |
| Disposition | all scrapped |
The Rhymney s class was a class of 0-6-0T steam locomotive 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.
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