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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 Von Borries |
|---|---|
| Built | 1902-1907 |
| Manufacturers | Hanomag, Linke-Hofmann |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Prussian S 7 Von Borries |
|---|---|
| Wheelbase | 8.85 m |
| Rigid wheelbase | 2.10 m |
| Empty weight | 54 t |
| Service weight | 60.2 t |
| Adhesive weight | 30.4 t |
| Axle load | 15.2 t |
| Water capacity | 21,500 l |
| Fuel capacity | 7 t (coal) |
Boiler
| Property | Prussian S 7 Von Borries |
|---|---|
| Grate area | 2.71 m² |
| Firebox surface | 10.02 m² |
| Tube heating surface | 162.92 m² |
| Evaporative heating surface | 172.94 m² |
| Total heating surface | 172.9 m² |
Power plant
| Property | Prussian S 7 Von Borries |
|---|---|
| Driver diameter | 1,980 mm |
| Boiler pressure | 14 bar |
| Expansion type | compound |
| Cylinders | four, HP: 360 x 600 mm and LP: 560 x 600 mm |
Power
| Property | Prussian S 7 Von Borries |
|---|---|
| Power source | steam |
| Estimated power | 800 kW (1,088 PS) |
| Top speed | 110 km/h |
| Starting effort | 66.1 kN |
| Starting effort simple | 79.4 kN |
Calculated values
| Property | Prussian S 7 Von Borries |
|---|---|
| Factor of adhesion | 1 : 4.51 |
| Optimal speed | 74 km/h |
| Power-to-weight ratio | 13.3 kW/t |
| Heating Surface Equivalent | 223.0 m² |
| Cylinder volume/HSE | 1 : 1,210.21 |
| Adhesive weight/Total | 1 : 1.98 |
| Tractive force/Heating surface | 1 : 7.99 |
| Grate area/Heating surface | 1 : 63.82 |
| Firebox/Tube surface | 1 : 16.26 |
