Gotthard Railway Ec 3/4
originally C I, meanwhile B 3
Switzerland 1882 12 produced
When the 2-6-0 wheel arrangement was not yet widespread in Europe, the Gotthard Railway had eight tank locomotives with this wheel arrangement built in Esslingen. They were to be used to pull passenger and express trains on the mountain route and also to pull freight trains in the lowlands. Four more followed in 1883 from the SLM. These differed from the first eight by the coal bunker, which was behind the cab. Upon the nationalization in 1909, all came to the SBB. They were retired between 1914 and 1933.
Technical data
General
| Property | 81-88 | 89-92 |
|---|---|---|
| Built | 1882 | 1883 |
| Manufacturers | Esslingen | SLM |
| Wheel arrangement | 2-6-0T (Mogul) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | 81-88 | 89-92 |
|---|---|---|
| Length | 10.34 m | |
| Wheelbase | 6.00 m | |
| Empty mass | 46.2 t | 48 t |
| Service mass | 60.5 t | 62.6 t |
| Adhesion mass | 48.2 t | 50 t |
| Rigid wheelbase | 3.40 m | |
| Axle load | 15.1 t | 15.7 t |
| Water capacity | 7,000 l | 7,400 l |
| Fuel capacity | 2.5 t (coal) | |
Boiler
| Property | 81-88 | 89-92 |
|---|---|---|
| Grate area | 1.8 m² | |
| Firebox surface | 8.7 m² | |
| Tube heating surface | 135.6 m² | |
| Evaporative heating surface | 144.3 m² | |
| Total heating surface | 144.3 m² | |
Power plant
| Property | 81-88 | 89-92 |
|---|---|---|
| Driver diameter | 1,330 mm | |
| Boiler pressure | 12 bar | |
| Expansion type | simple expansion | |
| Cylinders | two, 380 x 600 mm | |
Power
| Property | 81-88 | 89-92 |
|---|---|---|
| Power source | steam | |
| Indicated power | 368 kW (500 PS) | |
| Top speed | 65 km/h | |
| Starting effort | 66.4 kN | |
Calculated values
| Property | 81-88 | 89-92 |
|---|---|---|
| Factor of adhesion | 1 : 7.12 | 1 : 7.38 |
| Optimal speed | 34 km/h | |
| Power-to-weight ratio | 6.1 kW/t | 5.9 kW/t |
| Heating Surface Equivalent | 187.8 m² | |
| Cylinder volume/HSE | 1 : 724.67 | |
| Adhesive weight/Total | 1 : 1.26 | 1 : 1.25 |
| Tractive force/Heating surface | 1 : 9.62 | |
| Grate area/Heating surface | 1 : 80.17 | |
| Firebox/Tube surface | 1 : 15.59 | |
