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Great Eastern class L77
The Great Eastern class L77 was a 0-6-2T tank locomotive with drivers of 58 inches (1,473 mm) for suburban services around London. For this task they had Westinghouse air brakes and some were also equipped with a cond...
| Great Eastern class L77Remove | |
|---|---|
| Variant | Standard |
| Built | 1915-1928 |
| Manufacturers | Stratford;Gorton;Robert Stephenson & Co.;Beardmore;Doncaster |
| Wheel arrangement | C1 t |
| Gauge | 1435 mm |
| Length | |
| Service mass | 62589 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Eastern class L77 Standard Remove |
|---|---|
| Built | 1915-1928 |
| Manufacturers | Stratford, Gorton, Robert Stephenson & Co., Beardmore, Doncaster |
| Wheel arrangement | 0-6-2T (Webb) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Eastern class L77 Standard Remove |
|---|---|
| Wheelbase | 7.01 m |
| Service mass | 62.6 t |
| Adhesion mass | 50 t |
| Rigid wheelbase | 4.95 m |
| Axle load | 18 t |
| Water capacity | 7,276 l |
Boiler
| Property | Great Eastern class L77 Standard Remove |
|---|---|
| Grate area | 1.644 m² |
| Firebox surface | 10.898 m² |
| Tube heating surface | 99.564 m² |
| Evaporative heating surface | 110.462 m² |
| Superheater surface | 9.476 m² |
| Total heating surface | 119.9 m² |
Power plant
| Property | Great Eastern class L77 Standard Remove |
|---|---|
| Driver diameter | 1,473 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 610 mm |
Power
| Property | Great Eastern class L77 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 671 kW (912 PS) |
| Starting effort | 91.2 kN |
Calculated values
| Property | Great Eastern class L77 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 5.38 |
| Optimal speed | 45 km/h |
| Power-to-weight ratio | 10.7 kW/t |
| Heating Surface Equivalent | 183.9 m² |
| Cylinder volume/HSE | 1 : 1,088.39 |
| Adhesive weight/Total | 1 : 1.25 |
| Tractive force/Heating surface | 1 : 15.89 |
| Grate area/Heating surface | 1 : 72.95 |
| Firebox/Tube surface | 1 : 9.14 |
| Total/Superheater | 1 : 11.66 |
