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Great Western Railway Dean Express 2-4-0
In the late 1880s, when the broad gauge was nearing its end, William Dean still saw the demand for fast express locomotives. Their task were trains between London and Bristol which had to run at a constant high speed....
General
| Property | Great Western Railway Dean Express 2-4-0Remove |
|---|---|
| Built | 1888 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-4-0 (Porter) |
| Gauge | 2,140 mm (GWR broad gauge) |
Dimensions and weights
| Property | Great Western Railway Dean Express 2-4-0Remove |
|---|---|
| Wheelbase | 5.64 m |
| Rigid wheelbase | 5.64 m |
| Service weight | 44.7 t |
| Adhesive weight | 31.4 t |
Boiler
| Property | Great Western Railway Dean Express 2-4-0Remove |
|---|---|
| Grate area | 1.932 m² |
| Firebox surface | 11.464 m² |
| Tube heating surface | 133.279 m² |
| Evaporative heating surface | 144.743 m² |
| Total heating surface | 144.7 m² |
Power plant
| Property | Great Western Railway Dean Express 2-4-0Remove |
|---|---|
| Driver diameter | 2,146 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 610 mm |
Power
| Property | Great Western Railway Dean Express 2-4-0Remove |
|---|---|
| Power source | steam |
| Estimated power | 522 kW (710 PS) |
| Starting effort | 68.7 kN |
Calculated values
| Property | Great Western Railway Dean Express 2-4-0Remove |
|---|---|
| Factor of adhesion | 1 : 4.48 |
| Optimal speed | 47 km/h |
| Power-to-weight ratio | 11.7 kW/t |
| Heating Surface Equivalent | 202.1 m² |
| Cylinder volume/HSE | 1 : 1,222.94 |
| Adhesive weight/Total | 1 : 1.42 |
| Tractive force/Heating surface | 1 : 9.92 |
| Grate area/Heating surface | 1 : 74.92 |
| Firebox/Tube surface | 1 : 11.63 |
