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Southern Pacific class T-31
The T-31 class consisted of ten Ten-wheelers built for the Southern Pacific in 1912. They were used on local and branch line passenger trains. In contrast to their predecessors, the locomotives had superheaters ex wor...
General
| Property | Southern Pacific class T-31Remove |
|---|---|
| Built | 1912 |
| Manufacturers | Baldwin |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Southern Pacific class T-31Remove |
|---|---|
| Wheelbase | 7.87 m |
| Rigid wheelbase | 4.22 m |
| Service weight | 94.3 t |
| Adhesive weight | 73.5 t |
| Axle load | 25.2 t |
| Total weight | 135.1 t |
| Water capacity | 45,425 l |
| Fuel capacity | 15,142 l (oil) |
Boiler
| Property | Southern Pacific class T-31Remove |
|---|---|
| Grate area | 2.982 m² |
| Firebox surface | 20.532 m² |
| Tube heating surface | 202.622 m² |
| Evaporative heating surface | 223.153 m² |
| Superheater surface | 44.872 m² |
| Total heating surface | 268.0 m² |
Power plant
| Property | Southern Pacific class T-31Remove |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 559 x 711 mm |
Power
| Property | Southern Pacific class T-31Remove |
|---|---|
| Power source | steam |
| Estimated power | 895 kW (1,217 PS) |
| Starting effort | 162.7 kN |
Calculated values
| Property | Southern Pacific class T-31Remove |
|---|---|
| Factor of adhesion | 1 : 4.43 |
| Optimal speed | 34 km/h |
| Power-to-weight ratio | 9.5 kW/t |
| Heating Surface Equivalent | 415.6 m² |
| Cylinder volume/HSE | 1 : 839.45 |
| Adhesive weight/Total | 1 : 1.28 |
| Tractive force/Heating surface | 1 : 12.68 |
| Grate area/Heating surface | 1 : 89.88 |
| Firebox/Tube surface | 1 : 9.87 |
| Total/Superheater | 1 : 4.97 |
