Brig-Furka-Disentis Railway HG 3/4
Switzerland 1913 10 produced
The Brig-Furka-Disentis railway ordered ten rack locomotives from SLM while under construction, the first three of which were delivered directly to the construction sites. They were based on the HG 2/3 of the Visp-Zermatt railway, but had significantly more power thanks to superheated steam. The four cylinders worked in compound, with the gearwheels driven by the low-pressure cylinders and always operated together with the adhesion drive. With the electrification of the railway, the locomotives were retired there in 1940. One was sold to France and four to French Indochina (Vietnam). The latter four came back to Switzerland in 1990 and two of them are now running on the Furka mountain line after being refurbished.
Technical data
General
- Built
- 1913-1914
- Manufacturers
- SLM
- Wheel arrangement
- 2-6-0RT (Mogul)
- Gauge
- 1,000 mm (Meter gauge)
Dimensions and weights
- Length
- 8.75 m
- Wheelbase
- 5.33 m
- Empty mass
- 33.8 t
- Service mass
- 42 t
- Adhesion mass
- 35.9 t
- Rigid wheelbase
- 3.40 m
- Axle load
- 12 t
- Water capacity
- 3,200 l
- Fuel capacity
- 1 t (coal)
Boiler
- Grate area
- 1.4 m²
- Firebox surface
- 6.83 m²
- Tube heating surface
- 59.78 m²
- Evaporative heating surface
- 66.61 m²
- Superheater surface
- 17.2 m²
- Total heating surface
- 83.8 m²
Power plant
- Driver diameter
- 910 mm
- Boiler pressure
- 14 bar
- Expansion type
- compound
- Cylinders
- four, HP: 420 x 480 mm and LP: 560 x 450 mm
Power
- Power source
- steam
- Indicated power
- 440 kW (598 PS)
- Top speed
- 45 km/h
- Starting effort
- 138.4 kN
- Starting effort simple
- 166.1 kN
Calculated values
- Factor of adhesion
- 1 : 2.55
- Optimal speed
- 19 km/h
- Power-to-weight ratio
- 10.5 kW/t
- Heating Surface Equivalent
- 135.2 m²
- Cylinder volume/HSE
- 1 : 1,804.07
- Adhesive weight/Total
- 1 : 1.17
- Tractive force/Heating surface
- 1 : 34.49
- Grate area/Heating surface
- 1 : 59.86
- Firebox/Tube surface
- 1 : 8.75
- Total/Superheater
- 1 : 3.87
