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Great Northern (UK) class N2
As a replacement for Ivatt's N1, Nigel Gresley developed the N2, which was again a tank locomotive with a 0-6-2T wheel arrangement and a driver diameter of 5 feet 8 inches. They were superheated from the factory and w...
General
| Property | Great Northern (UK) class N2Remove |
|---|---|
| Built | 1920-1929 |
| Manufacturers | Doncaster, Beyer, Peacock & Co., Yorkshire Engine Co., Hawthorn, Leslie & Co. |
| Wheel arrangement | 0-6-2T (Webb) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Northern (UK) class N2Remove |
|---|---|
| Length | 11.55 m |
| Wheelbase | 7.24 m |
| Rigid wheelbase | 4.95 m |
| Service weight | 71.4 t |
| Adhesive weight | 56.6 t |
| Axle load | 19.3 t |
| Water capacity | 9,093 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | Great Northern (UK) class N2Remove |
|---|---|
| Grate area | 1.765 m² |
| Firebox surface | 10.963 m² |
| Tube heating surface | 81.755 m² |
| Evaporative heating surface | 92.717 m² |
| Superheater surface | 19.231 m² |
| Total heating surface | 111.9 m² |
Power plant
| Property | Great Northern (UK) class N2Remove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 11.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | Great Northern (UK) class N2Remove |
|---|---|
| Power source | steam |
| Estimated power | 634 kW (862 PS) |
| Starting effort | 88.7 kN |
Calculated values
| Property | Great Northern (UK) class N2Remove |
|---|---|
| Factor of adhesion | 1 : 6.26 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 8.9 kW/t |
| Heating Surface Equivalent | 186.0 m² |
| Cylinder volume/HSE | 1 : 1,298.97 |
| Adhesive weight/Total | 1 : 1.26 |
| Tractive force/Heating surface | 1 : 16.55 |
| Grate area/Heating surface | 1 : 63.43 |
| Firebox/Tube surface | 1 : 7.46 |
| Total/Superheater | 1 : 4.82 |
