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Southern Pacific class A-3
At the beginning of the 20th century when the Union Pacific, Southern Pacific, Kansas City Southern and others were under the same ownership, several locomotive types were standardized in the Harriman Common Standard....
| Southern Pacific class A-3Remove | |
|---|---|
| Variant | as built |
| Built | 1904-1908 |
| Manufacturers | ALCO;Baldwin |
| Wheel arrangement | 2B1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 88904 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Southern Pacific class A-3as built |
|---|---|
| Built | 1904-1908 |
| Manufacturers | ALCO, Baldwin |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Southern Pacific class A-3as built |
|---|---|
| Wheelbase | 8.41 m |
| Total wheelbase | 17.73 m |
| Service mass | 88.9 t |
| Adhesion mass | 47.6 t |
| Total mass | 153 t |
| Rigid wheelbase | 2.13 m |
| Axle load | 23.8 t |
| Water capacity | 26,498 l |
| Fuel capacity | 11,129 l (oil) |
Boiler
| Property | Southern Pacific class A-3as built |
|---|---|
| Grate area | 4.599 m² |
| Firebox surface | 16.165 m² |
| Tube heating surface | 229.935 m² |
| Evaporative heating surface | 246.1 m² |
| Total heating surface | 246.1 m² |
Power plant
| Property | Southern Pacific class A-3as built |
|---|---|
| Driver diameter | 2,057 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 711 mm |
Power
| Property | Southern Pacific class A-3as built |
|---|---|
| Power source | steam |
| Estimated power | 1,119 kW (1,521 PS) |
| Starting effort | 104.6 kN |
Calculated values
| Property | Southern Pacific class A-3as built |
|---|---|
| Factor of adhesion | 1 : 4.47 |
| Optimal speed | 66 km/h |
| Power-to-weight ratio | 12.6 kW/t |
| Heating Surface Equivalent | 326.9 m² |
| Cylinder volume/HSE | 1 : 881.84 |
| Adhesive weight/Total | 1 : 1.87 |
| Tractive force/Heating surface | 1 : 8.87 |
| Grate area/Heating surface | 1 : 53.51 |
| Firebox/Tube surface | 1 : 14.22 |
