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Great Northern (US) class L-3
In order to prevent individual chassis groups from slipping on slow freight trains, the Great Northern ordered a Mallet with unequal axle distribution. The front group consisted of a leading axle and three driving axl...
| Great Northern (US) class L-3Remove | |
|---|---|
| Variant | second series |
| Built | 1910 |
| Manufacturers | Baldwin |
| Wheel arrangement | (1C)D ma |
| Gauge | 1435 mm |
| Length | |
| Service mass | 167240 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (US) class L-3second series |
|---|---|
| Built | 1910 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-6-8-0 |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (US) class L-3second series |
|---|---|
| Wheelbase | 13.39 m |
| Total wheelbase | 23.23 m |
| Service mass | 167.2 t |
| Adhesion mass | 158.8 t |
| Total mass | 237.1 t |
| Rigid wheelbase | 3.81 m |
| Axle load | 22.7 t |
| Water capacity | 30,283 l |
| Fuel capacity | 11.8 t (coal) |
Boiler
| Property | Great Northern (US) class L-3second series |
|---|---|
| Grate area | 7.246 m² |
| Firebox surface | 20.903 m² |
| Tube heating surface | 447.31 m² |
| Evaporative heating surface | 468.213 m² |
| Superheater surface | 53.791 m² |
| Total heating surface | 522.0 m² |
Power plant
| Property | Great Northern (US) class L-3second series |
|---|---|
| Driver diameter | 1,397 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 584 x 813 mm and LP: 889 x 813 mm |
Power
| Property | Great Northern (US) class L-3second series |
|---|---|
| Power source | steam |
| Estimated power | 2,013 kW (2,737 PS) |
| Starting effort | 325.1 kN |
| Starting effort simple | 390.1 kN |
Calculated values
| Property | Great Northern (US) class L-3second series |
|---|---|
| Factor of adhesion | 1 : 4.79 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 12.0 kW/t |
| Heating Surface Equivalent | 680.3 m² |
| Cylinder volume/HSE | 1 : 1,382.10 |
| Adhesive weight/Total | 1 : 1.05 |
| Tractive force/Heating surface | 1 : 13.01 |
| Grate area/Heating surface | 1 : 72.04 |
| Firebox/Tube surface | 1 : 21.40 |
| Total/Superheater | 1 : 8.70 |
