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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...
General
| Property | Great Central classes 8K and 8M Remove |
|---|---|
| Built | 1911-1914 |
| Manufacturers | Gorton, Kitson & Co., North British |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Central classes 8K and 8M Remove |
|---|---|
| Wheelbase | 7.72 m |
| Rigid wheelbase | 5.21 m |
| Total wheelbase | 15.47 m |
| Service weight | 73.7 t |
| Adhesive weight | 67.1 t |
| Axle load | 16.8 t |
| Total weight | 120.6 t |
| Water capacity | 18,185 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Great Central classes 8K and 8M Remove |
|---|---|
| Grate area | 2.323 m² |
| Firebox surface | 14.214 m² |
| Tube heating surface | 142.885 m² |
| Evaporative heating surface | 157.099 m² |
| Superheater surface | 18.395 m² |
| Total heating surface | 175.5 m² |
Power plant
| Property | Great Central classes 8K and 8M Remove |
|---|---|
| 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 8M Remove |
|---|---|
| Power source | steam |
| Estimated power | 783 kW (1,065 PS) |
| Starting effort | 139.3 kN |
Calculated values
| Property | Great Central classes 8K and 8M Remove |
|---|---|
| Factor of adhesion | 1 : 4.72 |
| Optimal speed | 34 km/h |
| Power-to-weight ratio | 10.6 kW/t |
| Heating Surface Equivalent | 265.0 m² |
| Cylinder volume/HSE | 1 : 1,113.92 |
| Adhesive weight/Total | 1 : 1.10 |
| Tractive force/Heating surface | 1 : 16.58 |
| Grate area/Heating surface | 1 : 75.55 |
| Firebox/Tube surface | 1 : 10.05 |
| Total/Superheater | 1 : 8.54 |
