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Prussian T 7
The T 7 was developed in order to have a small tank locomotive for heavy shunting services and for use with freight trains on short branch lines, which is slightly more powerful than the T 3. From 1881, over 400 were ...
General
| Property | Prussian T 7 Ruhr variant |
|---|---|
| Built | 1881-1903 |
| Manufacturers | Borsig, Hanomag, Hohenzollern, Union Königsberg |
| Wheel arrangement | 0-6-0T (Six-coupled) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Prussian T 7 Ruhr variant |
|---|---|
| Length | 9.56 m |
| Wheelbase | 3.70 m |
| Rigid wheelbase | 3.70 m |
| Empty weight | 31 t |
| Service weight | 41.9 t |
| Adhesive weight | 41.9 t |
| Axle load | 14.9 t |
| Water capacity | 5,000 l |
| Fuel capacity | 1.5 t (coal) |
Boiler
| Property | Prussian T 7 Ruhr variant |
|---|---|
| Grate area | 1.32 m² |
| Firebox surface | 6.12 m² |
| Tube heating surface | 90.06 m² |
| Evaporative heating surface | 96.18 m² |
| Total heating surface | 96.2 m² |
Power plant
| Property | Prussian T 7 Ruhr variant |
|---|---|
| Driver diameter | 1,350 mm |
| Boiler pressure | 10 bar |
| Expansion type | simple expansion |
| Cylinders | two, 430 x 630 mm |
Power
| Property | Prussian T 7 Ruhr variant |
|---|---|
| Power source | steam |
| Estimated power | 250 kW (340 PS) |
| Top speed | 45 km/h |
| Starting effort | 73.3 kN |
Calculated values
| Property | Prussian T 7 Ruhr variant |
|---|---|
| Factor of adhesion | 1 : 5.61 |
| Optimal speed | 21 km/h |
| Power-to-weight ratio | 6.0 kW/t |
| Heating Surface Equivalent | 126.8 m² |
| Cylinder volume/HSE | 1 : 1,443.27 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 15.93 |
| Grate area/Heating surface | 1 : 72.86 |
| Firebox/Tube surface | 1 : 14.72 |
