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Great Central classes 9K and 9L
Between 1903 and 1905 the Great Central Railway procured a total of 40 class 9K tank locomotives for their London suburban lines, which were based on the 2-4-2T class 9G tank locomotives and were designed by John G. R...
General
| Property | Great Central classes 9K and 9LRemove |
|---|---|
| Built | 1903-1905 |
| Manufacturers | Vulcan Foundry, Beyer, Peacock & Co. |
| Wheel arrangement | 4-4-2T (Atlantic) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Central classes 9K and 9LRemove |
|---|---|
| Wheelbase | 9.11 m |
| Rigid wheelbase | 2.77 m |
| Empty weight | 63.9 t |
| Service weight | 72.9 t |
| Adhesive weight | 32.2 t |
| Axle load | 18.8 t |
| Water capacity | 6,590 l |
| Fuel capacity | 3.7 t (coal) |
Boiler
| Property | Great Central classes 9K and 9LRemove |
|---|---|
| Grate area | 1.858 m² |
| Firebox surface | 10.219 m² |
| Tube heating surface | 95.969 m² |
| Evaporative heating surface | 106.188 m² |
| Total heating surface | 106.2 m² |
Power plant
| Property | Great Central classes 9K and 9LRemove |
|---|---|
| Driver diameter | 1,702 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 660 mm |
Power
| Property | Great Central classes 9K and 9LRemove |
|---|---|
| Power source | steam |
| Estimated power | 447 kW (608 PS) |
| Starting effort | 76.1 kN |
Calculated values
| Property | Great Central classes 9K and 9LRemove |
|---|---|
| Factor of adhesion | 1 : 4.15 |
| Optimal speed | 35 km/h |
| Power-to-weight ratio | 6.1 kW/t |
| Heating Surface Equivalent | 157.3 m² |
| Cylinder volume/HSE | 1 : 1,378.66 |
| Adhesive weight/Total | 1 : 2.27 |
| Tractive force/Heating surface | 1 : 14.96 |
| Grate area/Heating surface | 1 : 57.15 |
| Firebox/Tube surface | 1 : 9.39 |
