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Pennsylvania class K4s
The most important express locomotive of the PRR from 1914 until it was replaced by diesel locomotives. It also survived all of its intended successors. Used the same boiler with Belpaire firebox as the L1s Mikado and...
| Pennsylvania class K4sRemove | |
|---|---|
| Variant | as built |
| Built | 1914-1928 |
| Manufacturers | Altoona;Baldwin |
| Wheel arrangement | 2C1 |
| Gauge | 1435 mm |
| Length | 25451 mm |
| Service mass | 138119 kg |
| Top speed | 145 km/h |
| Power | |
| Engine |
General
| Property | Pennsylvania class K4sas built |
|---|---|
| Built | 1914-1928 |
| Manufacturers | Altoona, Baldwin |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Pennsylvania class K4sas built |
|---|---|
| Length | 25.45 m |
| Wheelbase | 11.02 m |
| Total wheelbase | 22.76 m |
| Service mass | 138.1 t |
| Adhesion mass | 90.5 t |
| Total mass | 234.6 t |
| Rigid wheelbase | 4.22 m |
| Axle load | 29.5 t |
| Water capacity | 26,498 l |
| Fuel capacity | 14.5 t (coal) |
Boiler
| Property | Pennsylvania class K4sas built |
|---|---|
| Grate area | 6.503 m² |
| Firebox surface | 29.971 m² |
| Tube heating surface | 347.03 m² |
| Evaporative heating surface | 377.001 m² |
| Superheater surface | 87.608 m² |
| Total heating surface | 464.6 m² |
Power plant
| Property | Pennsylvania class K4sas built |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 14.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 686 x 711 mm |
Power
| Property | Pennsylvania class K4sas built |
|---|---|
| Power source | steam |
| Indicated power | 2,450 kW (3,331 PS) |
| Top speed | 145 km/h |
| Starting effort | 197.8 kN |
Calculated values
| Property | Pennsylvania class K4sas built |
|---|---|
| Factor of adhesion | 1 : 4.49 |
| Optimal speed | 76 km/h |
| Power-to-weight ratio | 17.7 kW/t |
| Heating Surface Equivalent | 702.1 m² |
| Cylinder volume/HSE | 1 : 748.38 |
| Adhesive weight/Total | 1 : 1.53 |
| Tractive force/Heating surface | 1 : 8.89 |
| Grate area/Heating surface | 1 : 71.45 |
| Firebox/Tube surface | 1 : 11.58 |
| Total/Superheater | 1 : 4.30 |
