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Pennsylvania class S2
The S2 was the largest steam locomotive ever with direct axle drive from a turbine. Delivered by Baldwin and Westinghouse in 1944, it was used by the PRR primarily to haul important express trains. Because the turbine...
| Pennsylvania class S2Remove | |
|---|---|
| Variant | Standard |
| Built | 1944 |
| Manufacturers | Baldwin;Westinghouse |
| Wheel arrangement | 3D3 |
| Gauge | 1435 mm |
| Length | 37370 mm |
| Service mass | 267584 kg |
| Top speed | 177 km/h |
| Power | |
| Engine |
General
| Property | Pennsylvania class S2 Standard Remove |
|---|---|
| Built | 1944 |
| Manufacturers | Baldwin, Westinghouse |
| Wheel arrangement | 6-8-6 |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Pennsylvania class S2 Standard Remove |
|---|---|
| Length | 37.37 m |
| Total wheelbase | 32.92 m |
| Empty mass | 243.6 t |
| Service mass | 267.6 t |
| Adhesion mass | 123.1 t |
| Total mass | 468.2 t |
| Axle load | 32.8 t |
| Water capacity | 73,816 l |
| Fuel capacity | 38.1 t (coal) |
Boiler
| Property | Pennsylvania class S2 Standard Remove |
|---|---|
| Grate area | 11.148 m² |
| Firebox surface | 56.392 m² |
| Tube heating surface | 333.336 m² |
| Evaporative heating surface | 389.729 m² |
| Superheater surface | 190.451 m² |
| Total heating surface | 580.2 m² |
Power plant
| Property | Pennsylvania class S2 Standard Remove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 21.4 bar |
Power
| Property | Pennsylvania class S2 Standard Remove |
|---|---|
| Power source | steam turbine |
| Indicated power | 5,145 kW (6,995 PS) |
| Top speed | 177 km/h |
Calculated values
| Property | Pennsylvania class S2 Standard Remove |
|---|---|
| Power-to-weight ratio | 19.2 kW/t |
| Heating Surface Equivalent | 1,052.6 m² |
| Adhesive weight/Total | 1 : 2.17 |
| Grate area/Heating surface | 1 : 52.04 |
| Firebox/Tube surface | 1 : 5.91 |
| Total/Superheater | 1 : 2.05 |
