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Brig-Furka-Disentis Railway HG 3/4
Switzerland | 1913 | 10 produced
No. 1 in the SLM data sheet
No. 1 in the SLM data sheet
SBB Historic

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 Bahn, but had a significantly higher power thanks to superheated steam. The four cylinders worked in compound operation, 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.

General
Built1913-1914
ManufacturerSLM
Axle config2-6-0RT (Mogul) 
Gauge3 ft 3 3/8 in (Meter gauge)
Dimensions and Weights
Length28 ft 8 1/2 in
Wheelbase17 ft 5 5/8 in
Fixed wheelbase11 ft 1 7/8 in
Empty weight74,516 lbs
Service weight92,638 lbs
Adhesive weight79,234 lbs
Axle load26,411 lbs
Water capacity845 us gal
Fuel capacity2,271 lbs (coal)
Power
Power sourcesteam
Indicated power590 hp (440 kW)
Optimal speed12 mph
Top speed28 mph
Power Plant
Driver diameter35.8 in
Boiler pressure203 psi
Expansion typecompound
Cylindersfour, HP: 16 9/16 x 18 7/8 in
and LP: 22 1/16 x 17 11/16 in
Boiler
Grate area15.1 sq ft
Firebox area73.5 sq ft
Tube heating area643.5 sq ft
Evaporative heating area717 sq ft
Superheater area185.1 sq ft
Total heating area902.1 sq ft
Calculated Values
steam locomotive
tank locomotive
narrow gauge
cog railway
passenger
last changed: 05/2023
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