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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 | superheated |
| Built | 1916 |
| Manufacturers | Doncaster |
| Wheel arrangement | D1 t |
| Gauge | 1435 mm |
| Length | 11767 mm |
| Service mass | 73359 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (UK) class L1superheated |
|---|---|
| Built | 1916 |
| Manufacturers | Doncaster |
| Wheel arrangement | 0-8-2T (River Irt) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (UK) class L1superheated |
|---|---|
| Length | 11.77 m |
| Wheelbase | 7.67 m |
| Service mass | 73.4 t |
| Adhesion mass | 61.4 t |
| Rigid wheelbase | 5.39 m |
| Water capacity | 6,818 l |
| Fuel capacity | 3.4 t (coal) |
Boiler
| Property | Great Northern (UK) class L1superheated |
|---|---|
| Grate area | 2.276 m² |
| Firebox surface | 12.588 m² |
| Tube heating surface | 95.458 m² |
| Evaporative heating surface | 108.046 m² |
| Superheater surface | 23.597 m² |
| Total heating surface | 131.6 m² |
Power plant
| Property | Great Northern (UK) class L1superheated |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 11.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 502 x 660 mm |
Power
| Property | Great Northern (UK) class L1superheated |
|---|---|
| Power source | steam |
| Estimated power | 708 kW (963 PS) |
| Starting effort | 116.4 kN |
Calculated values
| Property | Great Northern (UK) class L1superheated |
|---|---|
| Factor of adhesion | 1 : 5.17 |
| Optimal speed | 37 km/h |
| Power-to-weight ratio | 9.7 kW/t |
| Heating Surface Equivalent | 218.2 m² |
| Cylinder volume/HSE | 1 : 1,196.50 |
| Adhesive weight/Total | 1 : 1.20 |
| Tractive force/Heating surface | 1 : 18.47 |
| Grate area/Heating surface | 1 : 57.84 |
| Firebox/Tube surface | 1 : 7.58 |
| Total/Superheater | 1 : 4.58 |
