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Great Northern (UK) class O2
The GNR O2 was development of the O1, which initially differed almost only in the number and arrangement of the cylinders. Instead of the previous two cylinders, three smaller ones were now used to improve power trans...
| Great Northern (UK) class O2Remove | |
|---|---|
| Variant | |
| Built | 1921-1943 |
| Manufacturers | Doncaster;North British |
| Wheel arrangement | 1D |
| Gauge | 1435 mm |
| Length | 18713 mm |
| Service mass | 77016 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (UK) class O2Remove |
|---|---|
| Built | 1921-1943 |
| Manufacturers | Doncaster, North British |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (UK) class O2Remove |
|---|---|
| Length | 18.71 m |
| Wheelbase | 8.28 m |
| Total wheelbase | 15.91 m |
| Service mass | 77 t |
| Adhesion mass | 68.4 t |
| Total mass | 120.8 t |
| Rigid wheelbase | 5.64 m |
| Axle load | 17.9 t |
| Water capacity | 19,094 l |
| Fuel capacity | 7.3 t (coal) |
Boiler
| Property | Great Northern (UK) class O2Remove |
|---|---|
| Grate area | 2.555 m² |
| Firebox surface | 15.19 m² |
| Tube heating surface | 173.589 m² |
| Evaporative heating surface | 188.779 m² |
| Superheater surface | 40.041 m² |
| Total heating surface | 228.8 m² |
Power plant
| Property | Great Northern (UK) class O2Remove |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | three, 470 x 660 mm |
Power
| Property | Great Northern (UK) class O2Remove |
|---|---|
| Power source | steam |
| Estimated power | 876 kW (1,191 PS) |
| Starting effort | 162.2 kN |
Calculated values
| Property | Great Northern (UK) class O2Remove |
|---|---|
| Factor of adhesion | 1 : 4.14 |
| Optimal speed | 34 km/h |
| Power-to-weight ratio | 11.4 kW/t |
| Heating Surface Equivalent | 344.8 m² |
| Cylinder volume/HSE | 1 : 996.43 |
| Adhesive weight/Total | 1 : 1.13 |
| Tractive force/Heating surface | 1 : 14.81 |
| Grate area/Heating surface | 1 : 89.56 |
| Firebox/Tube surface | 1 : 11.43 |
| Total/Superheater | 1 : 4.71 |
