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Great Western Railway class 3031 “Achilles” / “Dean Single”
The class 3031 of the Great Western Railway, also known as the “Dean Single”, was created by rebuilding of 30 members of the class 3001, which had been built by William Dean in the 7 feet 1/4 inch broad gauge and were...
General
| Property | Great Western Railway class 3031 “Achilles” / “Dean Single”Remove |
|---|---|
| Built | 1894-1899 |
| Manufacturers | Swindon |
| Wheel arrangement | 4-2-2 (Single) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Western Railway class 3031 “Achilles” / “Dean Single”Remove |
|---|---|
| Wheelbase | 7.16 m |
| Rigid wheelbase | 2.74 m |
| Service weight | 49.8 t |
| Adhesive weight | 18.3 t |
| Axle load | 18.3 t |
| Total weight | 82.8 t |
| Water capacity | 16,364 l |
Boiler
| Property | Great Western Railway class 3031 “Achilles” / “Dean Single”Remove |
|---|---|
| Grate area | 1.932 m² |
| Firebox surface | 11.799 m² |
| Tube heating surface | 133.223 m² |
| Evaporative heating surface | 145.022 m² |
| Total heating surface | 145.0 m² |
Power plant
| Property | Great Western Railway class 3031 “Achilles” / “Dean Single”Remove |
|---|---|
| Driver diameter | 2,350 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 610 mm |
Power
| Property | Great Western Railway class 3031 “Achilles” / “Dean Single”Remove |
|---|---|
| Power source | steam |
| Estimated power | 541 kW (736 PS) |
| Starting effort | 56.7 kN |
Calculated values
| Property | Great Western Railway class 3031 “Achilles” / “Dean Single”Remove |
|---|---|
| Factor of adhesion | 1 : 3.17 |
| Optimal speed | 58 km/h |
| Power-to-weight ratio | 10.9 kW/t |
| Heating Surface Equivalent | 204.0 m² |
| Cylinder volume/HSE | 1 : 1,093.13 |
| Adhesive weight/Total | 1 : 2.72 |
| Tractive force/Heating surface | 1 : 8.16 |
| Grate area/Heating surface | 1 : 75.06 |
| Firebox/Tube surface | 1 : 11.29 |
