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Great Northern (UK) class L1
The L1 was a Great Northern Railway tank locomotive designed by Henry Ivatt for running commuter trains on the Metropolitan City Lines in London. Although four driving axles and a driving wheel diameter of only 4 feet...
| Great Northern (UK) class L1Remove | |
|---|---|
| Variant | prototype |
| Built | 1903 |
| Manufacturers | Doncaster |
| Wheel arrangement | D1 t |
| Gauge | 1435 mm |
| Length | 11767 mm |
| Service mass | 80268 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (UK) class L1prototype |
|---|---|
| Built | 1903 |
| Manufacturers | Doncaster |
| Wheel arrangement | 0-8-2T (River Irt) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (UK) class L1prototype |
|---|---|
| Length | 11.77 m |
| Wheelbase | 7.67 m |
| Service mass | 80.3 t |
| Adhesion mass | 67.1 t |
| Rigid wheelbase | 5.39 m |
| Axle load | 17.3 t |
| Water capacity | 9,093 l |
| Fuel capacity | 4.5 t (coal) |
Boiler
| Property | Great Northern (UK) class L1prototype |
|---|---|
| Grate area | 2.276 m² |
| Firebox surface | 12.704 m² |
| Tube heating surface | 120.984 m² |
| Evaporative heating surface | 133.688 m² |
| Total heating surface | 133.7 m² |
Power plant
| Property | Great Northern (UK) class L1prototype |
|---|---|
| Driver diameter | 1,410 mm |
| Boiler pressure | 12.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 660 mm |
Power
| Property | Great Northern (UK) class L1prototype |
|---|---|
| Power source | steam |
| Estimated power | 582 kW (791 PS) |
| Starting effort | 124.0 kN |
Calculated values
| Property | Great Northern (UK) class L1prototype |
|---|---|
| Factor of adhesion | 1 : 5.31 |
| Optimal speed | 29 km/h |
| Power-to-weight ratio | 7.3 kW/t |
| Heating Surface Equivalent | 197.2 m² |
| Cylinder volume/HSE | 1 : 1,357.47 |
| Adhesive weight/Total | 1 : 1.20 |
| Tractive force/Heating surface | 1 : 19.37 |
| Grate area/Heating surface | 1 : 58.74 |
| Firebox/Tube surface | 1 : 9.52 |
