TSB / SFB / EZB 2-8-0 Locomotives in Switzerland


Class Details by Steve Llanso of Sweat House Media

Class Ec 4/5 (Locobase 8048)

Data from [] . Like the Ec 3/5s bought at around the same time, this sextet was divided into three 2-locomotive buys for three closely linked railways. 11-12 (works # 1190-1191) went to the Thunerseebahn (TSB). The next pair, numbered 13-14 (works #1336-1337) were delivered in 1901 to the SpiezvFrutigenvBahn (SFB). In 1902, the Erlenbach-Zweisimmen-Bahn (EZB) took 15-16 (works #1441-1442).

The Consolidation tanks were von Borries compounds with the HP cylinder on the left (driver) side, the LP on the right. Tonnage ratings were 280 tons up a 1 1/2% grade at 20 km/h (12 mph).

After the Swiss system was largely electrified in the early 1920s, the Austrian BB+ took in the six locomotives, putting #11 in its 379 class because it had been superheated in the interim. and grouping the other 5 in its 279 class.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassEc 4/5
Locobase ID8048
RailroadTSB / SFB / EZB
CountrySwitzerland
Whyte2-8-0
Number in Class6
Road Numbers11-16
GaugeStd
Number Built6
BuilderSLM
Year1899
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.45 / 4.10
Engine Wheelbase (ft / m)21.10 / 6.43
Ratio of driving wheelbase to overall engine wheelbase 0.64
Overall Wheelbase (engine & tender) (ft / m)21.10 / 6.43
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)101,413 / 46,000
Engine Weight (lbs / kg)119,931 / 54,400
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1399 / 5.30
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.70 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)42 / 21
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)18.9" x 23.62" / 480x600 (1)
Low Pressure Cylinders (dia x stroke) (in / mm)27.56" x 23.62" / 700x600 (1)
Tractive Effort (lbs / kg)17,536 / 7954.21
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.78
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.80 / 3.90
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)18.29 / 1.70
Evaporative Heating Surface (sq ft / m2)1217 / 113.10
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1217 / 113.10
Evaporative Heating Surface/Cylinder Volume317.35
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3182
Same as above plus superheater percentage3182
Same as above but substitute firebox area for grate area
Power L1
Power MT

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