United Swiss 0-6-0 Locomotives in Switzerland

Class Details by Steve Llanso of Sweat House Media

Class Ec 2/5 (Locobase 9583)

Data from [], last accessed 28 September 2008.

As noted in Locobase 9582, Engerth locomotives did not prove sufficiently successful to overcome the complexity of their cog-driven tenders. So beginning in 1874, two of the locomotives were modified to add a third axle forward of the firebox, which required lengthening the boiler by 100 mm. This first conversion put too much weight on the third axle.

The second conversion idea showed greater promise when the railway adopted a Klose mechanism that drove the front tender axle as well as the three coupled axle. Its layout also redistributed the weight more evenly.

Of the 20 locomotives, 11 were retired in the first decade of the 20th Century. Most of the others lasted until the late 1920s and early 1930s.

Principal Dimensions by Steve Llanso of Middle Run Media

ClassEc 2/5
Locobase ID9583
RailroadUnited Swiss (VSB)
Number in Class20
Road Numbers2451-2470
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)28,660 / 13,000
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54.30 / 1380
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)16.06" x 22.09" / 408x561
Tractive Effort (lbs / kg)12,932 / 5865.86
Factor of Adhesion (Weight on Drivers/Tractive Effort)
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)15.06 / 1.40
Evaporative Heating Surface (sq ft / m2)1248 / 116
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1248 / 116
Evaporative Heating Surface/Cylinder Volume240.96
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2184
Same as above plus superheater percentage2184
Same as above but substitute firebox area for grate area
Power L1
Power MT

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