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Prussian P 7
Although the decision-makers at the Prussian State Railways were not great fans of four-cylinder compounds , they could not ignore the good experiences in France with the de Glehn locomotives. In this design, the seco...
| Prussian P 7Remove | |
|---|---|
| Variant | Standard |
| Built | 1899-1902 |
| Manufacturers | Grafenstaden |
| Wheel arrangement | 2C |
| Gauge | 1435 mm |
| Length | 18050 mm |
| Service mass | 61800 kg |
| Top speed | 90 km/h |
| Power | |
| Engine |
General
| Property | Prussian P 7 Standard Remove |
|---|---|
| Built | 1899-1902 |
| Manufacturers | Grafenstaden |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Prussian P 7 Standard Remove |
|---|---|
| Length | 18.05 m |
| Length loco | 10.60 m |
| Empty mass | 54.7 t |
| Service mass | 61.8 t |
| Adhesion mass | 44.5 t |
| Axle load | 15.1 t |
| Water capacity | 16,000 l |
| Fuel capacity | 6 t (coal) |
Boiler
| Property | Prussian P 7 Standard Remove |
|---|---|
| Grate area | 2.4 m² |
| Firebox surface | 11.3 m² |
| Tube heating surface | 128.2 m² |
| Evaporative heating surface | 139.5 m² |
| Total heating surface | 139.5 m² |
Power plant
| Property | Prussian P 7 Standard Remove |
|---|---|
| Driver diameter | 1,750 mm |
| Boiler pressure | 14 bar |
| Expansion type | compound |
| Cylinders | four, HP: 350 x 640 mm and LP: 550 x 640 mm |
Power
| Property | Prussian P 7 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 650 kW (884 PS) |
| Top speed | 90 km/h |
| Starting effort | 75.9 kN |
| Starting effort simple | 91.1 kN |
Calculated values
| Property | Prussian P 7 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 5.75 |
| Optimal speed | 53 km/h |
| Power-to-weight ratio | 10.5 kW/t |
| Heating Surface Equivalent | 196.0 m² |
| Cylinder volume/HSE | 1 : 1,404.10 |
| Adhesive weight/Total | 1 : 1.39 |
| Tractive force/Heating surface | 1 : 11.36 |
| Grate area/Heating surface | 1 : 58.13 |
| Firebox/Tube surface | 1 : 11.35 |
