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London & South Western class L12 “Bulldogs”
The GWR and the LSWR were in direct competition for boat trains, i.e. the heavy non-stop express trains between London and the ports on the Channel coast. In light of the new GWR 4-4-0 locos such as the City Class, Du...
General
| Property | London & South Western class L12 “Bulldogs” superheated |
|---|---|
| Built | 1904-1905 |
| Manufacturers | Nine Elms |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | London & South Western class L12 “Bulldogs” superheated |
|---|---|
| Length | 19.43 m |
| Wheelbase | 7.09 m |
| Rigid wheelbase | 3.05 m |
| Service weight | 54.1 t |
| Adhesive weight | 35.7 t |
| Axle load | 18.5 t |
| Total weight | 99.6 t |
| Water capacity | 21,823 l |
| Fuel capacity | 4.5 t (coal) |
Boiler
| Property | London & South Western class L12 “Bulldogs” superheated |
|---|---|
| Grate area | 2.23 m² |
| Firebox surface | 18.116 m² |
| Tube heating surface | 92.253 m² |
| Evaporative heating surface | 110.369 m² |
| Superheater surface | 18.116 m² |
| Total heating surface | 128.5 m² |
Power plant
| Property | London & South Western class L12 “Bulldogs” superheated |
|---|---|
| Driver diameter | 2,007 mm |
| Boiler pressure | 12.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | London & South Western class L12 “Bulldogs” superheated |
|---|---|
| Power source | steam |
| Estimated power | 820 kW (1,115 PS) |
| Starting effort | 78.6 kN |
Calculated values
| Property | London & South Western class L12 “Bulldogs” superheated |
|---|---|
| Factor of adhesion | 1 : 4.45 |
| Optimal speed | 64 km/h |
| Power-to-weight ratio | 15.2 kW/t |
| Heating Surface Equivalent | 237.2 m² |
| Cylinder volume/HSE | 1 : 1,018.64 |
| Adhesive weight/Total | 1 : 1.52 |
| Tractive force/Heating surface | 1 : 12.78 |
| Grate area/Heating surface | 1 : 57.62 |
| Firebox/Tube surface | 1 : 5.09 |
| Total/Superheater | 1 : 6.09 |
