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Swiss Central Railway Eb 2/4
The SCB ordered three types of Engerth locomotives for express, passenger and freight service. The express locomotive was the Eb 2/4 that had two driving axles at the front with a wheel diameter of 1,525 mm and a two-...
General
| Property | Swiss Central Railway Eb 2/4 as built |
|---|---|
| Built | 1857, 1859, 1872 |
| Manufacturers | Esslingen |
| Wheel arrangement | 0-4-4T (Engerth) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Swiss Central Railway Eb 2/4 as built |
|---|---|
| Length | 9.96 m |
| Rigid wheelbase | 2.25 m |
| Empty weight | 27.5 t |
| Service weight | 38.5 t |
| Adhesive weight | 21.5 t |
| Axle load | 10.8 t |
| Water capacity | 4,100 l |
| Fuel capacity | 2 t (coal) |
Boiler
| Property | Swiss Central Railway Eb 2/4 as built |
|---|---|
| Grate area | 0.8 m² |
| Firebox surface | 5.8 m² |
| Tube heating surface | 81.9 m² |
| Evaporative heating surface | 87.7 m² |
| Total heating surface | 87.7 m² |
Power plant
| Property | Swiss Central Railway Eb 2/4 as built |
|---|---|
| Driver diameter | 1,525 mm |
| Boiler pressure | 9 bar |
| Expansion type | simple expansion |
| Cylinders | two, 360 x 561 mm |
Power
| Property | Swiss Central Railway Eb 2/4 as built |
|---|---|
| Power source | steam |
| Estimated power | 120 kW (163 PS) |
| Starting effort | 36.5 kN |
Calculated values
| Property | Swiss Central Railway Eb 2/4 as built |
|---|---|
| Factor of adhesion | 1 : 5.78 |
| Optimal speed | 21 km/h |
| Power-to-weight ratio | 3.1 kW/t |
| Heating Surface Equivalent | 116.7 m² |
| Cylinder volume/HSE | 1 : 978.63 |
| Adhesive weight/Total | 1 : 1.79 |
| Tractive force/Heating surface | 1 : 8.69 |
| Grate area/Heating surface | 1 : 109.63 |
| Firebox/Tube surface | 1 : 14.12 |
