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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 | B4 |
| Built | 1899-1902 |
| Manufacturers | Brighton;Sharp, Stewart & Co. |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | |
| Service mass | 49786 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | London, Brighton & South Coast classes B4 and B4xB4 |
|---|---|
| Built | 1899-1902 |
| Manufacturers | Brighton, Sharp, Stewart & Co. |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | London, Brighton & South Coast classes B4 and B4xB4 |
|---|---|
| Wheelbase | 6.76 m |
| Total wheelbase | 13.59 m |
| Service mass | 49.8 t |
| Adhesion mass | 33.5 t |
| Total mass | 77.1 t |
| Rigid wheelbase | 2.67 m |
| Axle load | 15.2 t |
| Water capacity | 13,639 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | London, Brighton & South Coast classes B4 and B4xB4 |
|---|---|
| Grate area | 2.23 m² |
| Firebox surface | 11.706 m² |
| Tube heating surface | 140.191 m² |
| Evaporative heating surface | 151.897 m² |
| Total heating surface | 151.9 m² |
Power plant
| Property | London, Brighton & South Coast classes B4 and B4xB4 |
|---|---|
| Driver diameter | 2,057 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | London, Brighton & South Coast classes B4 and B4xB4 |
|---|---|
| Power source | steam |
| Estimated power | 634 kW (862 PS) |
| Starting effort | 78.9 kN |
Calculated values
| Property | London, Brighton & South Coast classes B4 and B4xB4 |
|---|---|
| Factor of adhesion | 1 : 4.17 |
| Optimal speed | 50 km/h |
| Power-to-weight ratio | 12.7 kW/t |
| Heating Surface Equivalent | 210.4 m² |
| Cylinder volume/HSE | 1 : 1,148.15 |
| Adhesive weight/Total | 1 : 1.48 |
| Tractive force/Heating surface | 1 : 10.84 |
| Grate area/Heating surface | 1 : 68.12 |
| Firebox/Tube surface | 1 : 11.98 |
