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The reference for locomotives and railcars

Visp-Zermatt Railway HG 2/3

Switzerland 1890 8 produced
No. 6 “Weisshorn” in the SLM data sheet SBB Historic CC BY-SA 4.0

In 1890, the Visp Zermatt Railway received its first four 0-4-2T rack locomotives from the SLM. They were among the first ones of the Abt system. All four cylinders worked with high-pressure steam and to provide space for the inner ones which powered the rack wheels, the frames were placed on the outside of the adhesion wheels. Top speed in adhesion mode was 25 km/h and limited to 10 km/h on rack sections. After the first four locomotives, four more followed until 1908 of which the last two were somewhat heavier.

Between 1913 and 1926, six were superheated, what increased their weight by a tonne. When the line was electrified in 1929, the locomotives were withdrawn from regular service, but five were kept as a reserve. Number 6 was sold to a new operator in the industry, while 7 was used for construction trains and some excursions. Both are now owned by the Furka Steam Railway, but only 6 is operational, while 7 was moved into storage in 2011.

Technical data

General

Property 1-6 7-8
Built 1890-1902 1906-1908
Manufacturers SLM
Wheel arrangement 0-4-2RT
Gauge 1,000 mm (Meter gauge)

Dimensions and weights

Property 1-6 7-8
Length 7.72 m
Wheelbase 4.30 m
Empty mass 23.5 t 24.6 t
Service mass 29 t 30.7 t
Adhesion mass 20.6 t 22.3 t
Rigid wheelbase 1.96 m
Axle load 10.3 t 11.2 t
Water capacity 2,500 l
Fuel capacity 1.3 t (coal)

Boiler

Property 1-6 7-8
Grate area 1.26 m²

Power plant

Property 1-6 7-8
Driver diameter 900 mm
Boiler pressure 12 bar
Expansion type simple expansion
Cylinders four, 320 x 450 mm

Power

Property 1-6 7-8
Power source steam
Estimated power 250 kW (340 PS)
Top speed 25 km/h
Starting effort 104.4 kN

Calculated values

Property 1-6 7-8
Factor of adhesion 1 : 1.93 1 : 2.09
Optimal speed 14 km/h
Power-to-weight ratio 8.6 kW/t 8.1 kW/t
Adhesive weight/Total 1 : 1.41 1 : 1.38
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