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Great Western Railway class 3150 “Large Prairie”
Based on the Prairie locomotives later known as the class 3100 and class 5100, the GWR had 41 of a heavier variant built as class 3150 in 1906. The standard type 2 boiler was replaced with a larger type 4 boiler, whic...
| Great Western Railway class 3150 “Large Prairie”Remove | |
|---|---|
| Variant | Standard |
| Built | 1906 |
| Manufacturers | Swindon |
| Wheel arrangement | 1C1 t |
| Gauge | 1435 mm |
| Length | 12497 mm |
| Service mass | 82917 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Western Railway class 3150 “Large Prairie” Standard Remove |
|---|---|
| Built | 1906 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-6-2T (Prairie) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Western Railway class 3150 “Large Prairie” Standard Remove |
|---|---|
| Length | 12.50 m |
| Wheelbase | 9.68 m |
| Empty mass | 65.7 t |
| Service mass | 82.9 t |
| Rigid wheelbase | 4.50 m |
| Water capacity | 9,093 l |
| Fuel capacity | 4.6 t (coal) |
Boiler
| Property | Great Western Railway class 3150 “Large Prairie” Standard Remove |
|---|---|
| Grate area | 1.914 m² |
| Firebox surface | 11.985 m² |
| Tube heating surface | 125.326 m² |
| Evaporative heating surface | 137.311 m² |
| Superheater surface | 17.837 m² |
| Total heating surface | 155.1 m² |
Power plant
| Property | Great Western Railway class 3150 “Large Prairie” Standard Remove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 762 mm |
Power
| Property | Great Western Railway class 3150 “Large Prairie” Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 783 kW (1,065 PS) |
| Starting effort | 114.2 kN |
Calculated values
| Property | Great Western Railway class 3150 “Large Prairie” Standard Remove |
|---|---|
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 9.4 kW/t |
| Heating Surface Equivalent | 232.9 m² |
| Cylinder volume/HSE | 1 : 1,134.74 |
| Tractive force/Heating surface | 1 : 15.37 |
| Grate area/Heating surface | 1 : 81.06 |
| Firebox/Tube surface | 1 : 10.46 |
| Total/Superheater | 1 : 7.70 |
