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London & North Western Problem or Lady of the Lake class
The second design by John Ramsbottom while he was in charge for the LNWR was a 2-2-2 express locomotive with a wheel diameter of seven feet six inches. This could be described as a simplified and therefore cheaper var...
General
| Property | London & North Western Problem or Lady of the Lake class as built |
|---|---|
| Built | 1859-1865 |
| Manufacturers | Crewe |
| Wheel arrangement | 2-2-2 (Jenny Lind) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | London & North Western Problem or Lady of the Lake class as built |
|---|---|
| Wheelbase | 4.67 m |
| Rigid wheelbase | 4.67 m |
| Service weight | 27.4 t |
| Adhesive weight | 11.6 t |
| Axle load | 11.6 t |
| Total weight | 45.1 t |
| Water capacity | 6,818 l |
Boiler
| Property | London & North Western Problem or Lady of the Lake class as built |
|---|---|
| Grate area | 1.384 m² |
| Firebox surface | 7.897 m² |
| Tube heating surface | 94.111 m² |
| Evaporative heating surface | 102.008 m² |
| Total heating surface | 102.0 m² |
Power plant
| Property | London & North Western Problem or Lady of the Lake class as built |
|---|---|
| Driver diameter | 2,324 mm |
| Boiler pressure | 8.6 bar |
| Expansion type | simple expansion |
| Cylinders | two, 406 x 610 mm |
Power
| Property | London & North Western Problem or Lady of the Lake class as built |
|---|---|
| Power source | steam |
| Estimated power | 224 kW (305 PS) |
| Starting effort | 31.7 kN |
Calculated values
| Property | London & North Western Problem or Lady of the Lake class as built |
|---|---|
| Factor of adhesion | 1 : 3.58 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 8.2 kW/t |
| Heating Surface Equivalent | 141.5 m² |
| Cylinder volume/HSE | 1 : 1,117.73 |
| Adhesive weight/Total | 1 : 2.37 |
| Tractive force/Heating surface | 1 : 6.50 |
| Grate area/Heating surface | 1 : 73.71 |
| Firebox/Tube surface | 1 : 11.92 |
