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Great Western Railway class 157
In 1862, Daniel Gooch designed ten standard gauge 2-2-2 express locomotives for the GWR which got the numbers 157 to 166. Built by Sharp, Stewart & Co., they got the nickname “Sharps”. They had double frames and the i...
| Great Western Railway class 157Remove | |
|---|---|
| Variant | |
| Built | 1879 |
| Manufacturers | Swindon |
| Wheel arrangement | 1A1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 36730 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Western Railway class 157Remove |
|---|---|
| Built | 1879 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-2-2 (Jenny Lind) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Western Railway class 157Remove |
|---|---|
| Total wheelbase | 5.39 m |
| Service mass | 36.7 t |
| Adhesion mass | 16.8 t |
| Rigid wheelbase | 5.39 m |
| Axle load | 16.8 t |
Boiler
| Property | Great Western Railway class 157Remove |
|---|---|
| Grate area | 1.793 m² |
| Firebox surface | 10.684 m² |
| Tube heating surface | 102.126 m² |
| Evaporative heating surface | 112.809 m² |
| Total heating surface | 112.8 m² |
Power plant
| Property | Great Western Railway class 157Remove |
|---|---|
| Driver diameter | 2,134 mm |
| Boiler pressure | 9.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 610 mm |
Power
| Property | Great Western Railway class 157Remove |
|---|---|
| Power source | steam |
| Estimated power | 336 kW (457 PS) |
| Starting effort | 49.0 kN |
Calculated values
| Property | Great Western Railway class 157Remove |
|---|---|
| Factor of adhesion | 1 : 3.36 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 9.1 kW/t |
| Heating Surface Equivalent | 166.2 m² |
| Cylinder volume/HSE | 1 : 1,204.11 |
| Adhesive weight/Total | 1 : 2.19 |
| Tractive force/Heating surface | 1 : 9.07 |
| Grate area/Heating surface | 1 : 62.92 |
| Firebox/Tube surface | 1 : 9.56 |
