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Southern Pacific classes GS-1 and GS-2
In 1930, the Southern Pacific used its Mountains as a base and installed a larger firebox , now supported by a two-axle bogie . This resulted in the GS-1, which was intended for passenger and express trains with a dri...
General
| Property | Southern Pacific classes GS-1 and GS-2 Remove |
|---|---|
| Built | 1937 |
| Manufacturers | Lima |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Southern Pacific classes GS-1 and GS-2 Remove |
|---|---|
| Wheelbase | 13.97 m |
| Rigid wheelbase | 6.10 m |
| Total wheelbase | 28.66 m |
| Service weight | 203.4 t |
| Adhesive weight | 120.9 t |
| Axle load | 30.4 t |
| Total weight | 372.6 t |
| Water capacity | 81,765 l |
| Fuel capacity | 23,753 l (oil) |
Boiler
| Property | Southern Pacific classes GS-1 and GS-2 Remove |
|---|---|
| Grate area | 8.38 m² |
| Firebox surface | 33.074 m² |
| Tube heating surface | 418.25 m² |
| Evaporative heating surface | 451.323 m² |
| Superheater surface | 238.297 m² |
| Total heating surface | 689.6 m² |
Power plant
| Property | Southern Pacific classes GS-1 and GS-2 Remove |
|---|---|
| Driver diameter | 1,867 mm |
| Boiler pressure | 17.2 bar |
| Expansion type | simple expansion |
| Cylinders | two, 686 x 762 mm |
Power
| Property | Southern Pacific classes GS-1 and GS-2 Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,468 kW (4,715 PS) |
| Starting effort | 281.3 kN |
Calculated values
| Property | Southern Pacific classes GS-1 and GS-2 Remove |
|---|---|
| Factor of adhesion | 1 : 4.22 |
| Optimal speed | 76 km/h |
| Power-to-weight ratio | 17.1 kW/t |
| Heating Surface Equivalent | 1,093.3 m² |
| Cylinder volume/HSE | 1 : 514.91 |
| Adhesive weight/Total | 1 : 1.68 |
| Tractive force/Heating surface | 1 : 8.52 |
| Grate area/Heating surface | 1 : 82.29 |
| Firebox/Tube surface | 1 : 12.65 |
| Total/Superheater | 1 : 1.89 |
