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Pennsylvania classes D and Da
For the transport of freight trains, the PRR had Baldwin build a class of ten-wheelers from 1868, which was one of the heaviest designs of this manufacturer at the time and achieved a very respectable number for its t...
General
| Property | Pennsylvania classes D and Da Remove |
|---|---|
| Built | 1868-1875 |
| Manufacturers | Baldwin, Altoona |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Pennsylvania classes D and Da Remove |
|---|---|
| Wheelbase | 7.21 m |
| Rigid wheelbase | 3.79 m |
| Total wheelbase | 13.97 m |
| Service weight | 35.1 t |
| Adhesive weight | 26.9 t |
| Axle load | 9.4 t |
| Total weight | 58.4 t |
| Water capacity | 9,085 l |
| Fuel capacity | 3.6 t (coal) |
Boiler
| Property | Pennsylvania classes D and Da Remove |
|---|---|
| Grate area | 1.347 m² |
| Firebox surface | 8.919 m² |
| Tube heating surface | 92.624 m² |
| Evaporative heating surface | 101.543 m² |
| Total heating surface | 101.5 m² |
Power plant
| Property | Pennsylvania classes D and Da Remove |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 8.6 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 559 mm |
Power
| Property | Pennsylvania classes D and Da Remove |
|---|---|
| Power source | steam |
| Estimated power | 280 kW (381 PS) |
| Starting effort | 60.2 kN |
Calculated values
| Property | Pennsylvania classes D and Da Remove |
|---|---|
| Factor of adhesion | 1 : 4.38 |
| Optimal speed | 29 km/h |
| Power-to-weight ratio | 8.0 kW/t |
| Heating Surface Equivalent | 146.1 m² |
| Cylinder volume/HSE | 1 : 1,255.53 |
| Adhesive weight/Total | 1 : 1.31 |
| Tractive force/Heating surface | 1 : 12.37 |
| Grate area/Heating surface | 1 : 75.38 |
| Firebox/Tube surface | 1 : 10.39 |
