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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...
General
| Property | Great Northern (US) class L-3 first series |
|---|---|
| Built | 1909 |
| Manufacturers | Baldwin |
| Wheel arrangement | 2-6-8-0 |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Northern (US) class L-3 first series |
|---|---|
| Wheelbase | 13.39 m |
| Rigid wheelbase | 3.81 m |
| Total wheelbase | 23.23 m |
| Service weight | 167.2 t |
| Adhesive weight | 158.8 t |
| Axle load | 23.3 t |
| Total weight | 237.1 t |
| Water capacity | 30,283 l |
| Fuel capacity | 11.8 t (coal) |
Boiler
| Property | Great Northern (US) class L-3 first 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 | 44.594 m² |
| Total heating surface | 512.8 m² |
Power plant
| Property | Great Northern (US) class L-3 first 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-3 first series |
|---|---|
| Power source | steam |
| Estimated power | 1,864 kW (2,534 PS) |
| Starting effort | 325.1 kN |
| Starting effort simple | 390.1 kN |
Calculated values
| Property | Great Northern (US) class L-3 first series |
|---|---|
| Factor of adhesion | 1 : 4.79 |
| Optimal speed | 35 km/h |
| Power-to-weight ratio | 11.1 kW/t |
| Heating Surface Equivalent | 661.9 m² |
| Cylinder volume/HSE | 1 : 1,420.51 |
| Adhesive weight/Total | 1 : 1.05 |
| Tractive force/Heating surface | 1 : 13.24 |
| Grate area/Heating surface | 1 : 70.77 |
| Firebox/Tube surface | 1 : 21.40 |
| Total/Superheater | 1 : 10.50 |
