Solothurn-Munster-Bahn 2-6-0 Locomotives in Switzerland

Class Details by Steve Llanso of Sweat House Media

Class OD 3/4 (Locobase 5110)

Data from [], accessed in August 2002.

#2 served the SMB until 1932, at which point she went to the Zurich gas works. In 1947, she was a works locomotive for Holzverzuckerungs AG Ems in Bnndnerland. Over a 65-year career, #2 amassed 686,015 miles in service.

Beginning in 1971, Fritz Lanz and Fritz Spichiger, Sr. of Langenthal began restoration work on #2. Their sons Markus and Fritz, Jr., respectively, joined the effort. #2 was fired again in 1984 and was operated off and on for the next couple of decades.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassOD 3/4
Locobase ID5110
Number in Class3
Road Numbers1-3
Number Built3
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)20.70 / 6.31
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)27,646 / 12,540
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)97,444 / 44,200
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)97,444 / 44,200
Tender Water Capacity (gals / ML)1135 / 4.30
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48.40 / 1230
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)16.54" x 23.62" / 420x600
Tractive Effort (lbs / kg)19,746 / 8956.65
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)18.30 / 1.70
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 Computation3184
Same as above plus superheater percentage3184
Same as above but substitute firebox area for grate area
Power L1
Power MT

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