Berner tramway 0-6-0 Locomotives in Switzerland

Class Details by Steve Llanso of Sweat House Media

Class 12 (Locobase 9688)

Data from [], last accessed 26 November 2008.

Used only for 8 years in tram-pulling service, this little locomotive was then adapted for snowplowing and other service functions on the Berne tram system. From 1908 to 1943, it operated on a sawmill property in Biel-Met.

From 1943, the locomotive has been displayed in the Zurich Railway Museum (1943-1959), Winterthur (1959-1972), and at Blonay-Chamby (1972-1983), back in Winterthur before the Technorama display (1983-1994) and finally back to Berne to be restored (1995-2002) and operated.

Also see [] -- the Trams of Geneva website (accessed 22 Jan 2006).

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID9688
RailroadBerner tramway
Number in Class1
Road Numbers12
Number Built1
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 2.95 / 0.90
Engine Wheelbase (ft / m) 2.95 / 0.90
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)29.53 / 9
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)35,274 / 16,000
Engine Weight (lbs / kg)35,274 / 16,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)35,274 / 16,000
Tender Water Capacity (gals / ML)422 / 1.60
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.40
Minimum weight of rail (calculated) (lb/yd / kg/m)20 / 10
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)29.10 / 740
Boiler Pressure (psi / kPa)217.60 / 15
High Pressure Cylinders (dia x stroke) (in / mm)9.45" x 13.78" / 240x350
Tractive Effort (lbs / kg)7822 / 3548.00
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.51
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2) 4.84 / 0.45
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1053
Same as above plus superheater percentage1053
Same as above but substitute firebox area for grate area
Power L1
Power MT

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