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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...
General
| Property | Pennsylvania class P (later D14a)Remove |
|---|---|
| Built | 1894 |
| Manufacturers | Altoona |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Pennsylvania class P (later D14a)Remove |
|---|---|
| Wheelbase | 6.95 m |
| Rigid wheelbase | 2.36 m |
| Total wheelbase | 15.02 m |
| Service weight | 57.9 t |
| Adhesive weight | 39.6 t |
| Axle load | 19.7 t |
| Total weight | 89.7 t |
| Water capacity | 11,356 l |
| Fuel capacity | 6.8 t (coal) |
Boiler
| Property | Pennsylvania class P (later D14a)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)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)Remove |
|---|---|
| Power source | steam |
| Estimated power | 615 kW (836 PS) |
| Starting effort | 71.7 kN |
Calculated values
| Property | Pennsylvania class P (later D14a)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 |
