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Prussian S 7
The class S 7 designates slightly different types of express train locomotives of the “Atlantic” type with four-cylinder compound engines. These either had the UIC wheel arrangement 2'B1 with a fixed trailing axle or ...
| Prussian S 7Remove | |
|---|---|
| Variant | De Glehn 1904 |
| Built | 1904 |
| Manufacturers | Grafenstaden |
| Wheel arrangement | 2B1 |
| Gauge | 1435 mm |
| Length | 18405 mm |
| Service mass | 62900 kg |
| Top speed | 110 km/h |
| Power | |
| Engine |
General
| Property | Prussian S 7De Glehn 1904 |
|---|---|
| Built | 1904 |
| Manufacturers | Grafenstaden |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Prussian S 7De Glehn 1904 |
|---|---|
| Length | 18.41 m |
| Length loco | 11.30 m |
| Empty mass | 57 t |
| Service mass | 62.9 t |
| Adhesion mass | 31.5 t |
| Rigid wheelbase | 2.14 m |
| Axle load | 15.8 t |
| Water capacity | 21,500 l |
| Fuel capacity | 7 t (coal) |
Boiler
| Property | Prussian S 7De Glehn 1904 |
|---|---|
| Grate area | 2.67 m² |
| Firebox surface | 9.8 m² |
| Tube heating surface | 167.12 m² |
| Evaporative heating surface | 176.92 m² |
| Total heating surface | 176.9 m² |
Power plant
| Property | Prussian S 7De Glehn 1904 |
|---|---|
| Driver diameter | 1,980 mm |
| Boiler pressure | 14 bar |
| Expansion type | compound |
| Cylinders | four, HP: 340 x 640 mm and LP: 560 x 640 mm |
Power
| Property | Prussian S 7De Glehn 1904 |
|---|---|
| Power source | steam |
| Estimated power | 800 kW (1,088 PS) |
| Top speed | 110 km/h |
| Starting effort | 65.0 kN |
| Starting effort simple | 78.0 kN |
Calculated values
| Property | Prussian S 7De Glehn 1904 |
|---|---|
| Factor of adhesion | 1 : 4.76 |
| Optimal speed | 76 km/h |
| Power-to-weight ratio | 12.7 kW/t |
| Heating Surface Equivalent | 225.9 m² |
| Cylinder volume/HSE | 1 : 1,212.14 |
| Adhesive weight/Total | 1 : 2.00 |
| Tractive force/Heating surface | 1 : 7.67 |
| Grate area/Heating surface | 1 : 66.26 |
| Firebox/Tube surface | 1 : 17.05 |
