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Great Western Railway class 3200 “Earl” / “Dukedog”
After the GWR had taken over the Cambrian Railways, they needed modern locomotives for passenger services on these lines which only allowed a low axle load . Since there were none of these locomotives available, they ...
General
| Property | Great Western Railway class 3200 “Earl” / “Dukedog”Remove |
|---|---|
| Built | 1929, 1936-1939 |
| Manufacturers | Swindon |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Western Railway class 3200 “Earl” / “Dukedog”Remove |
|---|---|
| Wheelbase | 6.78 m |
| Rigid wheelbase | 2.59 m |
| Service weight | 49.8 t |
| Adhesive weight | 30.9 t |
| Axle load | 15.6 t |
| Total weight | 90.4 t |
| Water capacity | 15,910 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Great Western Railway class 3200 “Earl” / “Dukedog”Remove |
|---|---|
| Grate area | 1.598 m² |
| Firebox surface | 10.586 m² |
| Tube heating surface | 95.602 m² |
| Evaporative heating surface | 106.188 m² |
| Superheater surface | 6.968 m² |
| Total heating surface | 113.2 m² |
Power plant
| Property | Great Western Railway class 3200 “Earl” / “Dukedog”Remove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 660 mm |
Power
| Property | Great Western Railway class 3200 “Earl” / “Dukedog”Remove |
|---|---|
| Power source | steam |
| Estimated power | 634 kW (862 PS) |
| Starting effort | 84.3 kN |
Calculated values
| Property | Great Western Railway class 3200 “Earl” / “Dukedog”Remove |
|---|---|
| Factor of adhesion | 1 : 3.59 |
| Optimal speed | 47 km/h |
| Power-to-weight ratio | 12.7 kW/t |
| Heating Surface Equivalent | 173.1 m² |
| Cylinder volume/HSE | 1 : 1,253.02 |
| Adhesive weight/Total | 1 : 1.61 |
| Tractive force/Heating surface | 1 : 15.56 |
| Grate area/Heating surface | 1 : 70.81 |
| Firebox/Tube surface | 1 : 9.03 |
| Total/Superheater | 1 : 15.24 |
