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Great Western Railway class 1000 “County”
The County class of the GWR was developed by Hawksworth during World War II and was intended for mixed service. It was the last of a series of ten-wheelers begun by Churchward in 1902 with the Saint class. It included...
General
| Property | Great Western Railway class 1000 “County” as built |
|---|---|
| Built | 1945-1947 |
| Manufacturers | Swindon |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Western Railway class 1000 “County” as built |
|---|---|
| Length | 19.21 m |
| Wheelbase | 8.31 m |
| Rigid wheelbase | 4.50 m |
| Service weight | 78.1 t |
| Adhesive weight | 60 t |
| Axle load | 20 t |
| Total weight | 127.9 t |
| Water capacity | 18,185 l |
| Fuel capacity | 7.1 t (coal) |
Boiler
| Property | Great Western Railway class 1000 “County” as built |
|---|---|
| Grate area | 2.679 m² |
| Firebox surface | 15.701 m² |
| Tube heating surface | 143.535 m² |
| Evaporative heating surface | 159.236 m² |
| Superheater surface | 23.597 m² |
| Total heating surface | 182.8 m² |
Power plant
| Property | Great Western Railway class 1000 “County” as built |
|---|---|
| Driver diameter | 1,905 mm |
| Boiler pressure | 19.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 762 mm |
Power
| Property | Great Western Railway class 1000 “County” as built |
|---|---|
| Power source | steam |
| Estimated power | 1,715 kW (2,332 PS) |
| Starting effort | 144.9 kN |
Calculated values
| Property | Great Western Railway class 1000 “County” as built |
|---|---|
| Factor of adhesion | 1 : 4.06 |
| Optimal speed | 72 km/h |
| Power-to-weight ratio | 22.0 kW/t |
| Heating Surface Equivalent | 284.9 m² |
| Cylinder volume/HSE | 1 : 927.56 |
| Adhesive weight/Total | 1 : 1.30 |
| Tractive force/Heating surface | 1 : 16.56 |
| Grate area/Heating surface | 1 : 68.25 |
| Firebox/Tube surface | 1 : 9.14 |
| Total/Superheater | 1 : 6.75 |
