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Bernese Oberland Railway HG 3/3 No. 1-6
Switzerland | 1890 | 6 produced
No. 2 around 1890
No. 2 around 1890
„Bilddatenbank Nostalgie der Jungfraubahnen”

During the construction of the Bernese Oberland Railway (BOB), it was planned to purchase one type of adhesion locomotive for the less steep section and one type of purely rack locomotive for the steeper section. By the time the line opened in 1890, the decision was made to purchase only one type with a combined adhesion and reck drive. The first three HG 3 were delivered in 1890 and three more in 1893. They later became HG 3/3 according to the Swiss system.

These were 0-6-0RT tank locomotives and outside frames. The rack drive was mounted on the driving axles to avoid problems with the suspension. Of the two rack gears under the locomotive, one was used for driving and one for braking. The boiler was inclined by five percent compared to the frame.

After the BOB was electrified in 1914, these locomotives were no longer needed in daily operations and five of them were sold. Three were converted from the gauge of 1,000 mm to 950 mm and sold to the Italian Mediterranea-Calabro-Lucane. Two went to the Arosa Railway, but were sold to industry after a short time. The sixth locomotive remained with the BOB as a reserve.

General
Built1890, 1893
ManufacturerSLM
Axle config0-6-0RT (Six-coupled) 
Gauge3 ft 3 3/8 in (Meter gauge)
Dimensions and Weights
Length24 ft 0 1/2 in
Wheelbase8 ft 10 5/16 in
Fixed wheelbase8 ft 10 5/16 in
Service weight62,832 lbs
Adhesive weight62,832 lbs
Water capacity660 us gal
Fuel capacity1,653 lbs (coal)
Power
Power sourcesteam
Estimated power228 hp (170 kW)
Optimal speed6 mph
Top speed19 mph
Power Plant
Driver diameter35.8 in
Boiler pressure174 psi
Expansion typesimple
Cylindersfour, adhesion: 12 5/8 x 17 11/16 in
rack: 12 5/8 x 15 3/4 in
Boiler
Grate area9.9 sq ft
Evaporative heating area656.6 sq ft
Total heating area656.6 sq ft
Calculated Values
steam locomotive
passenger
tank locomotive
narrow gauge
cog railway
last changed: 04/2024
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