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Swiss Federal Railways G 3/4
At the beginning of the century, the Brünig line, the only narrow gauge line of the Swiss Federal Railways, needed new, more powerful locomotives for the adhesion section in the lower sections. While the previous loco...
General
| Property | Swiss Federal Railways G 3/4 superheated |
|---|---|
| Built | 1905, 1912-1913 |
| Manufacturers | SLM |
| Wheel arrangement | 2-6-0T (Mogul) |
| Gauge | 1,000 mm (Meter gauge) |
Dimensions and weights
| Property | Swiss Federal Railways G 3/4 superheated |
|---|---|
| Length | 8.53 m |
| Wheelbase | 4.90 m |
| Rigid wheelbase | 2.90 m |
| Empty weight | 26.2 t |
| Service weight | 33.1 t |
| Adhesive weight | 27.9 t |
| Water capacity | 3,500 l |
| Fuel capacity | 0.8 t (coal) |
Boiler
| Property | Swiss Federal Railways G 3/4 superheated |
|---|---|
| Grate area | 1.1 m² |
| Firebox surface | 6 m² |
| Tube heating surface | 59.8 m² |
| Evaporative heating surface | 65.8 m² |
| Superheater surface | 18 m² |
| Total heating surface | 83.8 m² |
Power plant
| Property | Swiss Federal Railways G 3/4 superheated |
|---|---|
| Driver diameter | 1,050 mm |
| Boiler pressure | 12 bar |
| Expansion type | simple expansion |
| Cylinders | two, 340 x 500 mm |
Power
| Property | Swiss Federal Railways G 3/4 superheated |
|---|---|
| Power source | steam |
| Estimated power | 300 kW (408 PS) |
| Top speed | 60 km/h |
| Starting effort | 56.1 kN |
Calculated values
| Property | Swiss Federal Railways G 3/4 superheated |
|---|---|
| Factor of adhesion | 1 : 4.87 |
| Optimal speed | 32 km/h |
| Power-to-weight ratio | 9.1 kW/t |
| Heating Surface Equivalent | 131.8 m² |
| Cylinder volume/HSE | 1 : 688.86 |
| Adhesive weight/Total | 1 : 1.19 |
| Tractive force/Heating surface | 1 : 13.99 |
| Grate area/Heating surface | 1 : 76.18 |
| Firebox/Tube surface | 1 : 9.97 |
| Total/Superheater | 1 : 3.66 |
