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Philadelphia & Reading class P-3
In 1900, Baldwin built six Atlantics for the Philadelphia & Reading which were numbered 322 to 327 and designated class P-3a. Built for firing anthracite , they were designed as Camelbacks with a wide Wootten firebox ...
General
| Property | Philadelphia & Reading class P-3 P-3b |
|---|---|
| Built | 1902 |
| Manufacturers | Reading |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Philadelphia & Reading class P-3 P-3b |
|---|---|
| Wheelbase | 8.10 m |
| Rigid wheelbase | 2.21 m |
| Service weight | 87.4 t |
| Adhesive weight | 48.9 t |
| Axle load | 25 t |
| Total weight | 156.4 t |
| Water capacity | 26,498 l |
| Fuel capacity | 10.9 t (coal) |
Boiler
| Property | Philadelphia & Reading class P-3 P-3b |
|---|---|
| Grate area | 7.367 m² |
| Firebox surface | 16.908 m² |
| Tube heating surface | 256.598 m² |
| Evaporative heating surface | 273.507 m² |
| Total heating surface | 273.5 m² |
Power plant
| Property | Philadelphia & Reading class P-3 P-3b |
|---|---|
| Driver diameter | 2,140 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 381 x 610 mm and LP: 635 x 610 mm |
Power
| Property | Philadelphia & Reading class P-3 P-3b |
|---|---|
| Power source | steam |
| Estimated power | 1,230 kW (1,672 PS) |
| Starting effort | 71.3 kN |
| Starting effort simple | 85.5 kN |
Calculated values
| Property | Philadelphia & Reading class P-3 P-3b |
|---|---|
| Factor of adhesion | 1 : 6.73 |
| Optimal speed | 106 km/h |
| Power-to-weight ratio | 14.1 kW/t |
| Heating Surface Equivalent | 358.0 m² |
| Cylinder volume/HSE | 1 : 927.41 |
| Adhesive weight/Total | 1 : 1.79 |
| Tractive force/Heating surface | 1 : 5.44 |
| Grate area/Heating surface | 1 : 37.13 |
| Firebox/Tube surface | 1 : 15.18 |
