Loco Specification
| Boiler type | Number 12 | Boiler maximum dia. | 6 feet 0 inches (1.829 m) |
| Boiler minimum dia. | 5 feet 61⁄4 inches (1.683 m) | Fire tubes, no. and dia. | 171 x 21⁄4 inches (57 mm) |
| Flue tubes, no. and dia. | 16 x 57⁄8 inches (149 mm) | Superheater tubes, no. and dia. | 96 × 1 inch (25 mm) |
| Boiler pressure | 250 psi (1.72 MPa) | Boiler length | 16 feet 0 inches (4.88 m) |
| Area of firegrate | 34.3 square feet (3.19 m2) | Heating surfaces, tubes | 2,008 square feet (186.5 m2) |
| Heating surfaces, firebox | 194 square feet (18.0 m2) | Heating surfaces, superheater | 313 square feet (29.1 m2) |
Read more about this topic: GWR 6000 Class