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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....
| Great Western Railway Dean Express 2-4-0Remove | |
|---|---|
| Variant | Standard |
| Built | 1888 |
| Manufacturers | Swindon |
| Wheel arrangement | 1B |
| Gauge | 2140 mm |
| Length | |
| Service mass | 44706 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Western Railway Dean Express 2-4-0 Standard Remove |
|---|---|
| Built | 1888 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-4-0 (Porter) |
| Gauge | 2,140 mm |
Dimensions and weights
| Property | Great Western Railway Dean Express 2-4-0 Standard Remove |
|---|---|
| Wheelbase | 5.64 m |
| Service mass | 44.7 t |
| Adhesion mass | 31.4 t |
| Rigid wheelbase | 5.64 m |
Boiler
| Property | Great Western Railway Dean Express 2-4-0 Standard Remove |
|---|---|
| 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 2-4-0 Standard Remove |
|---|---|
| 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 2-4-0 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 522 kW (710 PS) |
| Starting effort | 68.7 kN |
Calculated values
| Property | Great Western Railway Dean Express 2-4-0 Standard Remove |
|---|---|
| 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 |
