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London & North Western No. 3020 “Cornwall”
In an attempt to combine large driving wheels with a low center of gravity, No. 3020 “Cornwall” of the LNWR was one of the most complicated, but unsuccessful designs. Designed by Francis Trevithick, son of the famous ...
| London & North Western No. 3020 “Cornwall”Remove | |
|---|---|
| Variant | Umbau 1858 |
| Built | 1847 |
| Manufacturers | Crewe |
| Wheel arrangement | 1A1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 28754 kg |
| Top speed | 113 km/h |
| Power | |
| Engine |
General
| Property | London & North Western No. 3020 “Cornwall” rebuilt 1858 Remove |
|---|---|
| Built | 1847 |
| Manufacturers | Crewe |
| Wheel arrangement | 2-2-2 (Jenny Lind) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | London & North Western No. 3020 “Cornwall” rebuilt 1858 Remove |
|---|---|
| Wheelbase | 4.52 m |
| Service mass | 28.8 t |
| Adhesion mass | 12.7 t |
| Rigid wheelbase | 4.52 m |
| Axle load | 12.7 t |
| Water capacity | 8,184 l |
Boiler
| Property | London & North Western No. 3020 “Cornwall” rebuilt 1858 Remove |
|---|---|
| Grate area | 1.394 m² |
| Firebox surface | 4.738 m² |
| Tube heating surface | 94.482 m² |
| Evaporative heating surface | 99.221 m² |
| Total heating surface | 99.2 m² |
Power plant
| Property | London & North Western No. 3020 “Cornwall” rebuilt 1858 Remove |
|---|---|
| Driver diameter | 2,591 mm |
| Boiler pressure | 9.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 438 x 610 mm |
Power
| Property | London & North Western No. 3020 “Cornwall” rebuilt 1858 Remove |
|---|---|
| Power source | steam |
| Estimated power | 149 kW (203 PS) |
| Top speed | 113 km/h |
| Starting effort | 37.1 kN |
Calculated values
| Property | London & North Western No. 3020 “Cornwall” rebuilt 1858 Remove |
|---|---|
| Factor of adhesion | 1 : 3.36 |
| Optimal speed | 24 km/h |
| Power-to-weight ratio | 5.2 kW/t |
| Heating Surface Equivalent | 122.9 m² |
| Cylinder volume/HSE | 1 : 1,495.63 |
| Adhesive weight/Total | 1 : 2.26 |
| Tractive force/Heating surface | 1 : 7.80 |
| Grate area/Heating surface | 1 : 71.18 |
| Firebox/Tube surface | 1 : 19.94 |
