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Great Western Railway class 5101 “Large Prairie”
Collett had a revised version of the earlier 5100 class procured from 1929. Since the class 5100 locomotives had the numbers 5111 to 5149 in addition to the number 5100, the first examples were given the numbers 5101 ...
General
| Property | Great Western Railway class 5101 “Large Prairie”Remove |
|---|---|
| Built | 1929-1949 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-6-2T (Prairie) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Western Railway class 5101 “Large Prairie”Remove |
|---|---|
| Length | 12.50 m |
| Wheelbase | 9.68 m |
| Rigid wheelbase | 4.50 m |
| Service weight | 79.7 t |
| Water capacity | 9,093 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | Great Western Railway class 5101 “Large Prairie”Remove |
|---|---|
| Grate area | 1.891 m² |
| Firebox surface | 11.316 m² |
| Tube heating surface | 106.369 m² |
| Evaporative heating surface | 117.684 m² |
| Superheater surface | 7.637 m² |
| Total heating surface | 125.3 m² |
Power plant
| Property | Great Western Railway class 5101 “Large Prairie”Remove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 762 mm |
Power
| Property | Great Western Railway class 5101 “Large Prairie”Remove |
|---|---|
| Power source | steam |
| Estimated power | 764 kW (1,039 PS) |
| Starting effort | 108.1 kN |
Calculated values
| Property | Great Western Railway class 5101 “Large Prairie”Remove |
|---|---|
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 9.6 kW/t |
| Heating Surface Equivalent | 189.5 m² |
| Cylinder volume/HSE | 1 : 1,320.04 |
| Tractive force/Heating surface | 1 : 18.01 |
| Grate area/Heating surface | 1 : 66.27 |
| Firebox/Tube surface | 1 : 9.40 |
| Total/Superheater | 1 : 15.41 |
