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Great Northern (US) class S-2
Compared to the S-1, the locomotives of the S-2 class received larger driving wheels with a diameter of 80 inches, as they were only intended for express trains. They also burned oil and now had cylinders measuring 29...
General
| Property | Great Northern (US) class S-2Remove |
|---|---|
| Built | 1930 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Northern (US) class S-2Remove |
|---|---|
| Wheelbase | 14.55 m |
| Rigid wheelbase | 6.33 m |
| Total wheelbase | 27.79 m |
| Service weight | 190.9 t |
| Adhesive weight | 112.2 t |
| Axle load | 28 t |
| Total weight | 339 t |
| Water capacity | 65,298 l |
| Fuel capacity | 21,955 l (oil) |
Boiler
| Property | Great Northern (US) class S-2Remove |
|---|---|
| Grate area | 9.081 m² |
| Firebox surface | 37.254 m² |
| Tube heating surface | 406.916 m² |
| Evaporative heating surface | 444.17 m² |
| Superheater surface | 210.426 m² |
| Total heating surface | 654.6 m² |
Power plant
| Property | Great Northern (US) class S-2Remove |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 737 x 737 mm |
Power
| Property | Great Northern (US) class S-2Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,356 kW (4,563 PS) |
| Starting effort | 259.4 kN |
Calculated values
| Property | Great Northern (US) class S-2Remove |
|---|---|
| Factor of adhesion | 1 : 4.24 |
| Optimal speed | 79 km/h |
| Power-to-weight ratio | 17.6 kW/t |
| Heating Surface Equivalent | 1,051.3 m² |
| Cylinder volume/HSE | 1 : 597.16 |
| Adhesive weight/Total | 1 : 1.70 |
| Tractive force/Heating surface | 1 : 8.27 |
| Grate area/Heating surface | 1 : 72.08 |
| Firebox/Tube surface | 1 : 10.92 |
| Total/Superheater | 1 : 2.11 |
