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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 ...
General
| Property | Prussian S 7 De Glehn 1903 |
|---|---|
| Built | 1903 |
| Manufacturers | Grafenstaden |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Prussian S 7 De Glehn 1903 |
|---|---|
| Length | 18.41 m |
| Length loco | 11.30 m |
| Wheelbase | 8.20 m |
| Rigid wheelbase | 2.10 m |
| Service weight | 65 t |
| Adhesive weight | 32 t |
| Axle load | 16 t |
| Water capacity | 21,500 l |
| Fuel capacity | 7 t (coal) |
Boiler
| Property | Prussian S 7 De Glehn 1903 |
|---|---|
| Grate area | 2.72 m² |
| Firebox surface | 15 m² |
| Tube heating surface | 141 m² |
| Evaporative heating surface | 156 m² |
| Total heating surface | 156.0 m² |
Power plant
| Property | Prussian S 7 De Glehn 1903 |
|---|---|
| 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 7 De Glehn 1903 |
|---|---|
| Power source | steam |
| Estimated power | 750 kW (1,020 PS) |
| Top speed | 110 km/h |
| Starting effort | 65.0 kN |
| Starting effort simple | 78.0 kN |
Calculated values
| Property | Prussian S 7 De Glehn 1903 |
|---|---|
| Factor of adhesion | 1 : 4.83 |
| Optimal speed | 71 km/h |
| Power-to-weight ratio | 11.5 kW/t |
| Heating Surface Equivalent | 231.0 m² |
| Cylinder volume/HSE | 1 : 1,185.48 |
| Adhesive weight/Total | 1 : 2.03 |
| Tractive force/Heating surface | 1 : 8.70 |
| Grate area/Heating surface | 1 : 57.35 |
| Firebox/Tube surface | 1 : 9.40 |
