Swiss Federal 2-6-2 Locomotives in Switzerland


Class Details by Steve Llanso of Sweat House Media

Class Eb 3/5 Habersack (Locobase 11249)

Data from [], last accessed 8 May 2010. See also "New Locomotives, Swiss Federal Rays", Volume 18 (14 September 1912), p. 188-189. Works numbers were 2163-2166, 2181-2184, and 2210-2211 in 1911; 2212-2221 in 1912; and 2393-2397 in 1913; 2501-2502 in 1915; 2551-2556 in 1916.

As the large B 3/4 class of Moguls was being introduced on the railroad (Locobase 4928), the SBB also identified a need for tank engines that could haul both suburban passenger trains and light freight.. Adopting the B 3/4's boiler, the designers reduced the cylinder diameter by 20 mm. Because bi-directional operation was so critical to this service, the SBB placed a trailing axle using an Adams bogie under the firebox and fitted a Winterthur-Helmholz bogie (a variant of the Krauss-Helmholz) that carried the lead coupled axle and front truck.

The locomotives were rated at 75 km/h (47 mph) in both directions. They were a versatile locomotive that enjoyed a relatively long career on the SBB before an extended retirement program began in 1950 and ended in 1965. Even then, some of the class went on to serve private railways.

Two -- 5810 and 5811 -- were preserved for museum-train use.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassEb 3/5 Habersack
Locobase ID11249
RailroadSwiss Federal
CountrySwitzerland
Whyte2-6-2T
Number in Class34
Road Numbers5801-5834
GaugeStd
Number Built34
BuilderSLM
Year1912
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.14 / 3.70
Engine Wheelbase (ft / m)29.20 / 8.90
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)29.20 / 8.90
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,935 / 16,300
Weight on Drivers (lbs / kg)106,704 / 48,400
Engine Weight (lbs / kg)165,126 / 74,900
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)165,126 / 74,900
Tender Water Capacity (gals / ML)2033 / 7.70
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.80 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)59.80 / 1520
Boiler Pressure (psi / kPa)169.70 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)20.47" x 23.62" / 520x600
Tractive Effort (lbs / kg)23,873 / 10828.62
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.47
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.78 / 4.20
Firebox Area (sq ft / m2)122.71 / 11.40
Grate Area (sq ft / m2)24.76 / 2.30
Evaporative Heating Surface (sq ft / m2)1292 / 120
Superheating Surface (sq ft / m2)361 / 33.50
Combined Heating Surface (sq ft / m2)1653 / 153.50
Evaporative Heating Surface/Cylinder Volume143.61
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4202
Same as above plus superheater percentage5126
Same as above but substitute firebox area for grate area25,405
Power L19690
Power MT600.62

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