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Pennsylvania class P (later D14a)
In the long line of PRR 4-4-0 locomotives which were originally designated class P, the last 16 were built in the Juniata shops at Altoona in 1894. Compared to the previous ones, the drivers had been enlarged to 80 in...
| Pennsylvania class P (later D14a)Remove | |
|---|---|
| Variant | Standard |
| Built | 1894 |
| Manufacturers | Altoona |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | |
| Service mass | 57901 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Pennsylvania class P (later D14a) Standard Remove |
|---|---|
| Built | 1894 |
| Manufacturers | Altoona |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Pennsylvania class P (later D14a) Standard Remove |
|---|---|
| Wheelbase | 6.95 m |
| Total wheelbase | 15.02 m |
| Service mass | 57.9 t |
| Adhesion mass | 39.6 t |
| Total mass | 89.7 t |
| Rigid wheelbase | 2.36 m |
| Axle load | 19.7 t |
| Water capacity | 11,356 l |
| Fuel capacity | 6.8 t (coal) |
Boiler
| Property | Pennsylvania class P (later D14a) Standard Remove |
|---|---|
| Grate area | 3.089 m² |
| Firebox surface | 13.75 m² |
| Tube heating surface | 133.316 m² |
| Evaporative heating surface | 147.066 m² |
| Total heating surface | 147.1 m² |
Power plant
| Property | Pennsylvania class P (later D14a) Standard Remove |
|---|---|
| Driver diameter | 2,032 mm |
| Boiler pressure | 12.1 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 610 mm |
Power
| Property | Pennsylvania class P (later D14a) Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 615 kW (836 PS) |
| Starting effort | 71.7 kN |
Calculated values
| Property | Pennsylvania class P (later D14a) Standard Remove |
|---|---|
| Factor of adhesion | 1 : 5.42 |
| Optimal speed | 53 km/h |
| Power-to-weight ratio | 10.6 kW/t |
| Heating Surface Equivalent | 215.8 m² |
| Cylinder volume/HSE | 1 : 1,033.37 |
| Adhesive weight/Total | 1 : 1.46 |
| Tractive force/Heating surface | 1 : 10.18 |
| Grate area/Heating surface | 1 : 47.61 |
| Firebox/Tube surface | 1 : 9.70 |
