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Philadelphia & Reading class D-8
The class D-8 consisted of 20 4-4-0 Camelback locomotives built in the Reading's own shops between 1898 and 1911. They were ordered after George W. Cushing had been unable to persuade the railroad that conventional na...
| Philadelphia & Reading class D-8Remove | |
|---|---|
| Variant | rebuilt D-8sd |
| Built | 1920, 1922 |
| Manufacturers | Reading |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | |
| Service mass | 77031 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Philadelphia & Reading class D-8rebuilt D-8sd |
|---|---|
| Built | 1920, 1922 |
| Manufacturers | Reading |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Philadelphia & Reading class D-8rebuilt D-8sd |
|---|---|
| Length loco | 11.58 m |
| Wheelbase | 7.09 m |
| Service mass | 77 t |
| Adhesion mass | 54.7 t |
| Total mass | 146 t |
| Rigid wheelbase | 2.44 m |
| Water capacity | 26,498 l |
| Fuel capacity | 10.9 t (coal) |
Boiler
| Property | Philadelphia & Reading class D-8rebuilt D-8sd |
|---|---|
| Grate area | 7.061 m² |
| Firebox surface | 19.603 m² |
| Tube heating surface | 109.44 m² |
| Evaporative heating surface | 129.042 m² |
| Superheater surface | 29.264 m² |
| Total heating surface | 158.3 m² |
Power plant
| Property | Philadelphia & Reading class D-8rebuilt D-8sd |
|---|---|
| Driver diameter | 1,740 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 610 mm |
Power
| Property | Philadelphia & Reading class D-8rebuilt D-8sd |
|---|---|
| Power source | steam |
| Estimated power | 1,081 kW (1,470 PS) |
| Starting effort | 116.8 kN |
Calculated values
| Property | Philadelphia & Reading class D-8rebuilt D-8sd |
|---|---|
| Factor of adhesion | 1 : 4.60 |
| Optimal speed | 56 km/h |
| Power-to-weight ratio | 14.0 kW/t |
| Heating Surface Equivalent | 285.6 m² |
| Cylinder volume/HSE | 1 : 953.97 |
| Adhesive weight/Total | 1 : 1.41 |
| Tractive force/Heating surface | 1 : 15.41 |
| Grate area/Heating surface | 1 : 22.42 |
| Firebox/Tube surface | 1 : 5.58 |
| Total/Superheater | 1 : 4.41 |
