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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...
General
| Property | Southern Pacific classes GS-3, GS-4 and GS-5 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-3, GS-4 and GS-5 Remove |
|---|---|
| Wheelbase | 14.53 m |
| Rigid wheelbase | 6.55 m |
| Service weight | 208.7 t |
| Adhesive weight | 121.2 t |
| Axle load | 30.4 t |
| Total weight | 371.4 t |
| Water capacity | 83,279 l |
| Fuel capacity | 227,503 l (oil) |
Boiler
| Property | Southern Pacific classes GS-3, GS-4 and GS-5 Remove |
|---|---|
| Grate area | 8.398 m² |
| Firebox surface | 36.046 m² |
| Tube heating surface | 418.25 m² |
| Evaporative heating surface | 454.296 m² |
| Superheater surface | 238.297 m² |
| Total heating surface | 692.6 m² |
Power plant
| Property | Southern Pacific classes GS-3, GS-4 and GS-5 Remove |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 19.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 660 x 813 mm |
Power
| Property | Southern Pacific classes GS-3, GS-4 and GS-5 Remove |
|---|---|
| Power source | steam |
| Estimated power | 3,729 kW (5,070 PS) |
| Starting effort | 286.3 kN |
Calculated values
| Property | Southern Pacific classes GS-3, GS-4 and GS-5 Remove |
|---|---|
| Factor of adhesion | 1 : 4.15 |
| Optimal speed | 80 km/h |
| Power-to-weight ratio | 17.9 kW/t |
| Heating Surface Equivalent | 1,111.1 m² |
| Cylinder volume/HSE | 1 : 501.14 |
| Adhesive weight/Total | 1 : 1.72 |
| Tractive force/Heating surface | 1 : 8.63 |
| Grate area/Heating surface | 1 : 82.47 |
| Firebox/Tube surface | 1 : 11.60 |
| Total/Superheater | 1 : 1.91 |
