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London, Brighton & South Coast classes B4 and B4x
The LB&SCR class B4 express locomotives were developed in 1899 by L.B. Billinton because the B2, which had been introduced just a few years earlier, proved to be too weak. Plans were again made to build 25 in Brighton...
| London, Brighton & South Coast classes B4 and B4xRemove | |
|---|---|
| Variant | rebuilt B4x |
| Built | 1922-1924 |
| Manufacturers | Brighton |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | |
| Service mass | 58982 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | London, Brighton & South Coast classes B4 and B4xrebuilt B4x |
|---|---|
| Built | 1922-1924 |
| Manufacturers | Brighton |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | London, Brighton & South Coast classes B4 and B4xrebuilt B4x |
|---|---|
| Wheelbase | 7.47 m |
| Total wheelbase | 14.61 m |
| Service mass | 59 t |
| Adhesion mass | 38.5 t |
| Total mass | 98.9 t |
| Rigid wheelbase | 3.05 m |
| Axle load | 20.1 t |
| Water capacity | 16,364 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | London, Brighton & South Coast classes B4 and B4xrebuilt B4x |
|---|---|
| Grate area | 2.304 m² |
| Firebox surface | 12.914 m² |
| Tube heating surface | 107.396 m² |
| Evaporative heating surface | 120.31 m² |
| Superheater surface | 25.92 m² |
| Total heating surface | 146.2 m² |
Power plant
| Property | London, Brighton & South Coast classes B4 and B4xrebuilt B4x |
|---|---|
| Driver diameter | 2,057 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 660 mm |
Power
| Property | London, Brighton & South Coast classes B4 and B4xrebuilt B4x |
|---|---|
| Power source | steam |
| Estimated power | 783 kW (1,065 PS) |
| Starting effort | 87.4 kN |
Calculated values
| Property | London, Brighton & South Coast classes B4 and B4xrebuilt B4x |
|---|---|
| Factor of adhesion | 1 : 4.32 |
| Optimal speed | 55 km/h |
| Power-to-weight ratio | 13.3 kW/t |
| Heating Surface Equivalent | 236.7 m² |
| Cylinder volume/HSE | 1 : 1,130.89 |
| Adhesive weight/Total | 1 : 1.53 |
| Tractive force/Heating surface | 1 : 12.48 |
| Grate area/Heating surface | 1 : 63.47 |
| Firebox/Tube surface | 1 : 8.32 |
| Total/Superheater | 1 : 4.64 |
