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London & North Western Alfred the Great class
Webb developed the Alfred the Great class as an enlarged development of the Jubilee class. Like these, it had a four-cylinder compound engine. A redesign of the valve gear made them the Benbow class. After the Jubilee...
| London & North Western Alfred the Great classRemove | |
|---|---|
| Variant | Standard |
| Built | 1901-1903 |
| Manufacturers | Crewe |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | |
| Service mass | 58931 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | London & North Western Alfred the Great class Standard Remove |
|---|---|
| Built | 1901-1903 |
| Manufacturers | Crewe |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | London & North Western Alfred the Great class Standard Remove |
|---|---|
| Service mass | 58.9 t |
| Adhesion mass | 37.6 t |
| Total mass | 86 t |
| Axle load | 18.8 t |
| Water capacity | 9,093 l |
Boiler
| Property | London & North Western Alfred the Great class Standard Remove |
|---|---|
| Grate area | 1.905 m² |
| Firebox surface | 16.653 m² |
| Tube heating surface | 127.997 m² |
| Evaporative heating surface | 144.65 m² |
| Total heating surface | 144.7 m² |
Power plant
| Property | London & North Western Alfred the Great class Standard Remove |
|---|---|
| Driver diameter | 2,159 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 406 x 610 mm and LP: 521 x 610 mm |
Power
| Property | London & North Western Alfred the Great class Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 652 kW (886 PS) |
| Starting effort | 67.9 kN |
| Starting effort simple | 81.5 kN |
Calculated values
| Property | London & North Western Alfred the Great class Standard Remove |
|---|---|
| Factor of adhesion | 1 : 5.43 |
| Optimal speed | 60 km/h |
| Power-to-weight ratio | 11.1 kW/t |
| Heating Surface Equivalent | 227.9 m² |
| Cylinder volume/HSE | 1 : 1,263.46 |
| Adhesive weight/Total | 1 : 1.57 |
| Tractive force/Heating surface | 1 : 9.81 |
| Grate area/Heating surface | 1 : 75.93 |
| Firebox/Tube surface | 1 : 7.69 |
