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Great Northern (UK) No. 472 and 473
The Great Northern needed new locomotives to accommodate the growing freight traffic on the Metropolitan Line between King's Cross and the goods yards between Farringdon Street and Ludgate Hill. The particular challen...
General
| Property | Great Northern (UK) No. 472 and 473Remove |
|---|---|
| Built | 1866 |
| Manufacturers | Avonside |
| Wheel arrangement | 0-8-0T (Eight-coupled) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Northern (UK) No. 472 and 473Remove |
|---|---|
| Wheelbase | 4.83 m |
| Rigid wheelbase | 1.65 m |
| Service weight | 56.9 t |
| Adhesive weight | 56.9 t |
| Axle load | 14.2 t |
Boiler
| Property | Great Northern (UK) No. 472 and 473Remove |
|---|---|
| Grate area | 1.579 m² |
| Firebox surface | 9.29 m² |
| Tube heating surface | 134.719 m² |
| Evaporative heating surface | 144.009 m² |
| Total heating surface | 144.0 m² |
Power plant
| Property | Great Northern (UK) No. 472 and 473Remove |
|---|---|
| Driver diameter | 1,067 mm |
| Boiler pressure | 10.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 610 mm |
Power
| Property | Great Northern (UK) No. 472 and 473Remove |
|---|---|
| Power source | steam |
| Estimated power | 317 kW (431 PS) |
| Starting effort | 110.9 kN |
Calculated values
| Property | Great Northern (UK) No. 472 and 473Remove |
|---|---|
| Factor of adhesion | 1 : 5.03 |
| Optimal speed | 18 km/h |
| Power-to-weight ratio | 5.6 kW/t |
| Heating Surface Equivalent | 190.5 m² |
| Cylinder volume/HSE | 1 : 1,110.13 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 16.09 |
| Grate area/Heating surface | 1 : 91.20 |
| Firebox/Tube surface | 1 : 14.50 |
