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London & North Western 17 inch Coal Engine
Francis Webb developed the 17 inch coal engine in the early 1870s as his first design for the LNWR. It was created under the requirement that production and operation should be as cheap as possible. These three-axle m...
General
| Property | London & North Western 17 inch Coal EngineRemove |
|---|---|
| Built | 1873-1892 |
| Manufacturers | Crewe |
| Wheel arrangement | 0-6-0 (Six-coupled) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | London & North Western 17 inch Coal EngineRemove |
|---|---|
| Wheelbase | 4.72 m |
| Rigid wheelbase | 4.72 m |
| Service weight | 30 t |
| Adhesive weight | 30 t |
| Axle load | 10.5 t |
| Total weight | 55.4 t |
| Water capacity | 8,184 l |
Boiler
| Property | London & North Western 17 inch Coal EngineRemove |
|---|---|
| Grate area | 1.589 m² |
| Firebox surface | 8.789 m² |
| Tube heating surface | 91.082 m² |
| Evaporative heating surface | 99.871 m² |
| Total heating surface | 99.9 m² |
Power plant
| Property | London & North Western 17 inch Coal EngineRemove |
|---|---|
| Driver diameter | 1,295 mm |
| Boiler pressure | 9.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 432 x 610 mm |
Power
| Property | London & North Western 17 inch Coal EngineRemove |
|---|---|
| Power source | steam |
| Estimated power | 261 kW (355 PS) |
| Starting effort | 72.0 kN |
Calculated values
| Property | London & North Western 17 inch Coal EngineRemove |
|---|---|
| Factor of adhesion | 1 : 4.09 |
| Optimal speed | 23 km/h |
| Power-to-weight ratio | 8.7 kW/t |
| Heating Surface Equivalent | 143.8 m² |
| Cylinder volume/HSE | 1 : 1,241.43 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 15.05 |
| Grate area/Heating surface | 1 : 62.85 |
| Firebox/Tube surface | 1 : 10.36 |
