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Great Western Railway class 2021
The GWR class 2021 was a 0-6-0 tank locomotive introduced in 1897. It was directly based on the class 850 of 1874, but had a longer wheelbase to fit a larger firebox . The design is generally being attributed to Georg...
General
| Property | Great Western Railway class 2021Remove |
|---|---|
| Built | 1897-1905 |
| Manufacturers | Wolverhampton |
| Wheel arrangement | 0-6-0ST (Six-coupled) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Western Railway class 2021Remove |
|---|---|
| Length | 9.17 m |
| Wheelbase | 4.47 m |
| Rigid wheelbase | 4.47 m |
| Service weight | 41.3 t |
| Adhesive weight | 41.3 t |
| Axle load | 13.9 t |
| Water capacity | 4,546 l |
Boiler
| Property | Great Western Railway class 2021Remove |
|---|---|
| Grate area | 1.347 m² |
| Firebox surface | 8.594 m² |
| Tube heating surface | 86.052 m² |
| Evaporative heating surface | 94.645 m² |
| Total heating surface | 94.6 m² |
Power plant
| Property | Great Western Railway class 2021Remove |
|---|---|
| Driver diameter | 1,257 mm |
| Boiler pressure | 10.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 419 x 610 mm |
Power
| Property | Great Western Railway class 2021Remove |
|---|---|
| Power source | steam |
| Estimated power | 298 kW (405 PS) |
| Starting effort | 74.9 kN |
Calculated values
| Property | Great Western Railway class 2021Remove |
|---|---|
| Factor of adhesion | 1 : 5.42 |
| Optimal speed | 24 km/h |
| Power-to-weight ratio | 7.2 kW/t |
| Heating Surface Equivalent | 137.6 m² |
| Cylinder volume/HSE | 1 : 1,222.17 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 16.52 |
| Grate area/Heating surface | 1 : 70.26 |
| Firebox/Tube surface | 1 : 10.01 |
