Cambrian Railways Mazeppa class
Great Britain 1863 12 produced
Starting in 1863, Sharp, Stewart & Co. not only delivered some goods locomotives with a 0-6-0 wheel arrangement to the newly founded Cambrian Railways, but also twelve locomotives with a 2-4-0 wheel arrangement. The driving wheels were not particularly large at 66 inches, but they were used for passenger and express trains. Although relatively small for their time and not particularly fast, the engines were richly decorated with large amounts of brass. From 1890 they were fitted with a new boiler and a driver's cab. Two locomotives were converted to tank locomotives from 1908.
Technical data
General
| Property | as built | rebuilt |
|---|---|---|
| Built | 1863-1864 | 1890 |
| Manufacturers | Sharp, Stewart & Co. | Cambrian |
| Wheel arrangement | 2-4-0 (Porter) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | rebuilt |
|---|---|---|
| Wheelbase | 4.34 m | |
| Service mass | 25.2 t | 27.4 t |
| Adhesion mass | 16.9 t | 18.5 t |
| Total mass | 47.3 t | 49.5 t |
| Rigid wheelbase | 2.36 m | |
| Axle load | 9.6 t | 10.2 t |
| Water capacity | 5,455 l | |
| Fuel capacity | 3 t (coal) | |
Boiler
| Property | as built | rebuilt |
|---|---|---|
| Grate area | 1.078 m² | |
| Firebox surface | 6.633 m² | |
| Tube heating surface | 78.373 m² | 83.018 m² |
| Evaporative heating surface | 85.006 m² | 89.652 m² |
| Total heating surface | 85.0 m² | 89.7 m² |
Power plant
| Property | as built | rebuilt |
|---|---|---|
| Driver diameter | 1,676 mm | |
| Boiler pressure | 8.3 bar | 10.3 bar |
| Expansion type | simple expansion | |
| Cylinders | two, 406 x 508 mm | |
Power
| Property | as built | rebuilt |
|---|---|---|
| Power source | steam | |
| Estimated power | 149 kW (203 PS) | 186 kW (253 PS) |
| Starting effort | 35.2 kN | 44.0 kN |
Calculated values
| Property | as built | rebuilt |
|---|---|---|
| Factor of adhesion | 1 : 4.71 | 1 : 4.13 |
| Optimal speed | 26 km/h | |
| Power-to-weight ratio | 5.9 kW/t | 6.8 kW/t |
| Heating Surface Equivalent | 118.2 m² | 122.8 m² |
| Cylinder volume/HSE | 1 : 1,115.27 | 1 : 1,073.09 |
| Adhesive weight/Total | 1 : 1.49 | 1 : 1.48 |
| Tractive force/Heating surface | 1 : 8.65 | 1 : 10.25 |
| Grate area/Heating surface | 1 : 78.86 | 1 : 83.17 |
| Firebox/Tube surface | 1 : 11.82 | 1 : 12.52 |