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Southern Pacific classes GS-3, GS-4 and GS-5
After the GS-1 and GS-2, Southern Pacific decided to design additional express locomotives in the “Golden State” series for higher speeds. By increasing the size of the drivers from 73.5 to 80 inches, the GS-3 was cre...
| Southern Pacific classes GS-3, GS-4 and GS-5Remove | |
|---|---|
| Variant | |
| Built | 1941-1942 |
| Manufacturers | Lima |
| Wheel arrangement | 2D2 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 215457 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Southern Pacific classes GS-3, GS-4 and GS-5Remove |
|---|---|
| Built | 1941-1942 |
| Manufacturers | Lima |
| Wheel arrangement | 4-8-4 (Northern) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Southern Pacific classes GS-3, GS-4 and GS-5Remove |
|---|---|
| Wheelbase | 14.53 m |
| Service mass | 215.5 t |
| Adhesion mass | 125.1 t |
| Total mass | 357.8 t |
| Rigid wheelbase | 6.55 m |
| Axle load | 31.3 t |
| Water capacity | 88,200 l |
| Fuel capacity | 23,753 l (oil) |
Boiler
| Property | Southern Pacific classes GS-3, GS-4 and GS-5Remove |
|---|---|
| Grate area | 8.398 m² |
| Firebox surface | 35.768 m² |
| Tube heating surface | 418.25 m² |
| Evaporative heating surface | 454.018 m² |
| Superheater surface | 170.384 m² |
| Total heating surface | 624.4 m² |
Power plant
| Property | Southern Pacific classes GS-3, GS-4 and GS-5Remove |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 20.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 648 x 813 mm |
Power
| Property | Southern Pacific classes GS-3, GS-4 and GS-5Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,729 kW (5,070 PS) |
| Starting effort | 295.0 kN |
| Starting effort booster | 57.827 kN |
Calculated values
| Property | Southern Pacific classes GS-3, GS-4 and GS-5Remove |
|---|---|
| Factor of adhesion | 1 : 4.16 |
| Optimal speed | 77 km/h |
| Power-to-weight ratio | 17.3 kW/t |
| Heating Surface Equivalent | 973.6 m² |
| Cylinder volume/HSE | 1 : 550.12 |
| Adhesive weight/Total | 1 : 1.72 |
| Tractive force/Heating surface | 1 : 9.87 |
| Grate area/Heating surface | 1 : 74.35 |
| Firebox/Tube surface | 1 : 11.69 |
| Total/Superheater | 1 : 2.66 |
