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London & North Eastern class P2
For the difficult LNER line between Edinburgh and Aberdeen, Gresley designed the 2-8-2 express locomotive of the class P2. Being the only eight-coupled express locomotive regularly used in Britain, this allowed enough...
| London & North Eastern class P2Remove | |
|---|---|
| Variant | Standard |
| Built | 1934-1936 |
| Manufacturers | Doncaster |
| Wheel arrangement | 1D1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 112273 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | London & North Eastern class P2 Standard Remove |
|---|---|
| Built | 1934-1936 |
| Manufacturers | Doncaster |
| Wheel arrangement | 2-8-2 (Mikado) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | London & North Eastern class P2 Standard Remove |
|---|---|
| Wheelbase | 11.56 m |
| Total wheelbase | 19.53 m |
| Service mass | 112.3 t |
| Adhesion mass | 81.9 t |
| Total mass | 173.6 t |
| Rigid wheelbase | 5.94 m |
| Axle load | 20.3 t |
| Water capacity | 22,731 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | London & North Eastern class P2 Standard Remove |
|---|---|
| Grate area | 4.645 m² |
| Firebox surface | 23.458 m² |
| Tube heating surface | 217.904 m² |
| Evaporative heating surface | 241.362 m² |
| Superheater surface | 69.584 m² |
| Total heating surface | 310.9 m² |
Power plant
| Property | London & North Eastern class P2 Standard Remove |
|---|---|
| Driver diameter | 1,880 mm |
| Boiler pressure | 15.2 bar |
| Expansion type | simple expansion |
| Cylinders | three, 533 x 660 mm |
Power
| Property | London & North Eastern class P2 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,088 kW (2,839 PS) |
| Starting effort | 193.3 kN |
Calculated values
| Property | London & North Eastern class P2 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.16 |
| Optimal speed | 66 km/h |
| Power-to-weight ratio | 18.6 kW/t |
| Heating Surface Equivalent | 497.8 m² |
| Cylinder volume/HSE | 1 : 889.31 |
| Adhesive weight/Total | 1 : 1.37 |
| Tractive force/Heating surface | 1 : 12.99 |
| Grate area/Heating surface | 1 : 66.94 |
| Firebox/Tube surface | 1 : 9.29 |
| Total/Superheater | 1 : 3.47 |
