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London, Midland & Scottish class 4P Compound 4-4-0
Since the Midland Railway had good experiences with their class 1000 compound 4-4-0s, the LMS ordered locomotives which were nearly identical. Out of a total of 195, 75 each were built by Vulcan Foundry and Derby, 25 ...
General
| Property | London, Midland & Scottish class 4P Compound 4-4-0Remove |
|---|---|
| Built | 1924-1932 |
| Manufacturers | Derby, Horwich, North British, Vulcan Foundry |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | London, Midland & Scottish class 4P Compound 4-4-0Remove |
|---|---|
| Length | 17.27 m |
| Wheelbase | 7.39 m |
| Rigid wheelbase | 2.92 m |
| Service weight | 62.7 t |
| Adhesive weight | 39.8 t |
| Axle load | 19.9 t |
| Total weight | 105.1 t |
| Water capacity | 15,910 l |
| Fuel capacity | 5.6 t (coal) |
Boiler
| Property | London, Midland & Scottish class 4P Compound 4-4-0Remove |
|---|---|
| Grate area | 2.638 m² |
| Firebox surface | 13.685 m² |
| Tube heating surface | 108.669 m² |
| Evaporative heating surface | 122.353 m² |
| Superheater surface | 27.035 m² |
| Total heating surface | 149.4 m² |
Power plant
| Property | London, Midland & Scottish class 4P Compound 4-4-0Remove |
|---|---|
| Driver diameter | 2,057 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | three, HP: 483 x 660 mm and LP: 533 x 660 mm |
Power
| Property | London, Midland & Scottish class 4P Compound 4-4-0Remove |
|---|---|
| Power source | steam |
| Estimated power | 969 kW (1,317 PS) |
| Starting effort | 72.3 kN |
| Starting effort simple | 86.7 kN |
Calculated values
| Property | London, Midland & Scottish class 4P Compound 4-4-0Remove |
|---|---|
| Factor of adhesion | 1 : 5.41 |
| Optimal speed | 82 km/h |
| Power-to-weight ratio | 15.5 kW/t |
| Heating Surface Equivalent | 244.8 m² |
| Cylinder volume/HSE | 1 : 1,192.08 |
| Adhesive weight/Total | 1 : 1.57 |
| Tractive force/Heating surface | 1 : 10.10 |
| Grate area/Heating surface | 1 : 56.63 |
| Firebox/Tube surface | 1 : 7.94 |
| Total/Superheater | 1 : 4.53 |
