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Southern Pacific classes P-1, P-3 and P-4
The Southern Pacific was one of the railroads which used the Harriman Common Standard Pacific as a light express locomotive. These had drivers of 77 inches and cylinders of 22 by 28 inches. The valve gear was of the S...
| Southern Pacific classes P-1, P-3 and P-4Remove | |
|---|---|
| Variant | rebuilt P-4 |
| Built | 1927-1929 |
| Manufacturers | Sacramento |
| Wheel arrangement | 2C1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 120202 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Southern Pacific classes P-1, P-3 and P-4rebuilt P-4 |
|---|---|
| Built | 1927-1929 |
| Manufacturers | Sacramento |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Southern Pacific classes P-1, P-3 and P-4rebuilt P-4 |
|---|---|
| Length loco | 14.21 m |
| Wheelbase | 10.57 m |
| Total wheelbase | 18.90 m |
| Service mass | 120.2 t |
| Adhesion mass | 70.3 t |
| Total mass | 193.8 t |
| Rigid wheelbase | 4.06 m |
| Axle load | 23.9 t |
Boiler
| Property | Southern Pacific classes P-1, P-3 and P-4rebuilt P-4 |
|---|---|
| Grate area | 4.599 m² |
| Firebox surface | 16.537 m² |
| Tube heating surface | 238.854 m² |
| Evaporative heating surface | 255.391 m² |
| Superheater surface | 50.911 m² |
| Total heating surface | 306.3 m² |
Power plant
| Property | Southern Pacific classes P-1, P-3 and P-4rebuilt P-4 |
|---|---|
| Driver diameter | 1,956 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 584 x 711 mm |
Power
| Property | Southern Pacific classes P-1, P-3 and P-4rebuilt P-4 |
|---|---|
| Power source | steam |
| Estimated power | 1,417 kW (1,927 PS) |
| Starting effort | 152.7 kN |
| Starting effort booster | 51.155 kN |
Calculated values
| Property | Southern Pacific classes P-1, P-3 and P-4rebuilt P-4 |
|---|---|
| Factor of adhesion | 1 : 4.52 |
| Optimal speed | 56 km/h |
| Power-to-weight ratio | 11.8 kW/t |
| Heating Surface Equivalent | 439.9 m² |
| Cylinder volume/HSE | 1 : 866.73 |
| Adhesive weight/Total | 1 : 1.71 |
| Tractive force/Heating surface | 1 : 10.41 |
| Grate area/Heating surface | 1 : 66.60 |
| Firebox/Tube surface | 1 : 14.44 |
| Total/Superheater | 1 : 5.02 |
