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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 | as built |
| Built | 1904-1907, 1911, 1917-1918 |
| Manufacturers | ALCO;Baldwin;Sacramento |
| Wheel arrangement | 2C1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 100698 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Southern Pacific classes P-1, P-3 and P-4as built |
|---|---|
| Built | 1904-1907, 1911, 1917-1918 |
| Manufacturers | ALCO, Baldwin, Sacramento |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Southern Pacific classes P-1, P-3 and P-4as built |
|---|---|
| Length loco | 13.71 m |
| Wheelbase | 10.16 m |
| Total wheelbase | 18.90 m |
| Service mass | 100.7 t |
| Adhesion mass | 64 t |
| Total mass | 174.3 t |
| Rigid wheelbase | 4.06 m |
| Axle load | 20.9 t |
Boiler
| Property | Southern Pacific classes P-1, P-3 and P-4as built |
|---|---|
| Grate area | 4.599 m² |
| Firebox surface | 16.165 m² |
| Tube heating surface | 267.004 m² |
| Evaporative heating surface | 283.169 m² |
| Total heating surface | 283.2 m² |
Power plant
| Property | Southern Pacific classes P-1, P-3 and P-4as built |
|---|---|
| Driver diameter | 1,956 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 559 x 711 mm |
Power
| Property | Southern Pacific classes P-1, P-3 and P-4as built |
|---|---|
| Power source | steam |
| Estimated power | 1,193 kW (1,622 PS) |
| Starting effort | 133.1 kN |
Calculated values
| Property | Southern Pacific classes P-1, P-3 and P-4as built |
|---|---|
| Factor of adhesion | 1 : 4.71 |
| Optimal speed | 55 km/h |
| Power-to-weight ratio | 11.8 kW/t |
| Heating Surface Equivalent | 364.0 m² |
| Cylinder volume/HSE | 1 : 958.36 |
| Adhesive weight/Total | 1 : 1.57 |
| Tractive force/Heating surface | 1 : 9.82 |
| Grate area/Heating surface | 1 : 61.57 |
| Firebox/Tube surface | 1 : 16.52 |
