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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 rebuilt M-2 |
|---|---|
| Built | 1926-1928 |
| Manufacturers | Great Northern |
| Wheel arrangement | 2-6-8-0 |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Northern (US) class L-3 rebuilt M-2 |
|---|---|
| Wheelbase | 13.39 m |
| Rigid wheelbase | 4.57 m |
| Total wheelbase | 26.04 m |
| Service weight | 182.8 t |
| Adhesive weight | 174.2 t |
| Axle load | 25.4 t |
| Total weight | 264.4 t |
| Water capacity | 37,854 l |
| Fuel capacity | 17,034 l (oil) |
Boiler
| Property | Great Northern (US) class L-3 rebuilt M-2 |
|---|---|
| Grate area | 7.246 m² |
| Firebox surface | 23.969 m² |
| Tube heating surface | 462.843 m² |
| Evaporative heating surface | 486.812 m² |
| Superheater surface | 138.426 m² |
| Total heating surface | 625.2 m² |
Power plant
| Property | Great Northern (US) class L-3 rebuilt M-2 |
|---|---|
| Driver diameter | 1,397 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | four, 559 x 813 mm |
Power
| Property | Great Northern (US) class L-3 rebuilt M-2 |
|---|---|
| Power source | steam |
| Estimated power | 2,386 kW (3,244 PS) |
| Starting effort | 447.2 kN |
Calculated values
| Property | Great Northern (US) class L-3 rebuilt M-2 |
|---|---|
| Factor of adhesion | 1 : 3.82 |
| Optimal speed | 32 km/h |
| Power-to-weight ratio | 13.1 kW/t |
| Heating Surface Equivalent | 883.5 m² |
| Cylinder volume/HSE | 1 : 902.48 |
| Adhesive weight/Total | 1 : 1.05 |
| Tractive force/Heating surface | 1 : 14.94 |
| Grate area/Heating surface | 1 : 86.29 |
| Firebox/Tube surface | 1 : 19.31 |
| Total/Superheater | 1 : 3.52 |
