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Great Central classes 8K and 8M
The GCR 8K was a class of 2-8-0 freight locomotives designed by John G. Robinson, basically a superheated variant of his 8A with a leading axle . A total of 126 were built between 1911 and 1914. 56 of these had been b...
| Great Central classes 8K and 8MRemove | |
|---|---|
| Variant | |
| Built | 1918-1921 |
| Manufacturers | Gorton |
| Wheel arrangement | 1D |
| Gauge | 1435 mm |
| Length | |
| Service mass | 76407 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Central classes 8K and 8MRemove |
|---|---|
| Built | 1918-1921 |
| Manufacturers | Gorton |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Central classes 8K and 8MRemove |
|---|---|
| Wheelbase | 7.77 m |
| Total wheelbase | 15.52 m |
| Service mass | 76.4 t |
| Adhesion mass | 69 t |
| Total mass | 123.3 t |
| Rigid wheelbase | 5.21 m |
| Axle load | 17.2 t |
| Water capacity | 18,185 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Great Central classes 8K and 8MRemove |
|---|---|
| Grate area | 2.415 m² |
| Firebox surface | 16.165 m² |
| Tube heating surface | 152.454 m² |
| Evaporative heating surface | 168.619 m² |
| Superheater surface | 28.614 m² |
| Total heating surface | 197.2 m² |
Power plant
| Property | Great Central classes 8K and 8MRemove |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 660 mm |
Power
| Property | Great Central classes 8K and 8MRemove |
|---|---|
| Power source | steam |
| Estimated power | 858 kW (1,167 PS) |
| Starting effort | 139.3 kN |
Calculated values
| Property | Great Central classes 8K and 8MRemove |
|---|---|
| Factor of adhesion | 1 : 4.86 |
| Optimal speed | 37 km/h |
| Power-to-weight ratio | 11.2 kW/t |
| Heating Surface Equivalent | 306.7 m² |
| Cylinder volume/HSE | 1 : 962.41 |
| Adhesive weight/Total | 1 : 1.11 |
| Tractive force/Heating surface | 1 : 14.76 |
| Grate area/Heating surface | 1 : 81.67 |
| Firebox/Tube surface | 1 : 9.43 |
| Total/Superheater | 1 : 5.89 |
