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 Middle Run Media | |
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Class | Ec 4/5 |
Locobase ID | 8048 |
Railroad | TSB / SFB / EZB |
Country | Switzerland |
Whyte | 2-8-0 |
Number in Class | 6 |
Road Numbers | 11-16 |
Gauge | Std |
Number Built | 6 |
Builder | SLM |
Year | 1899 |
Valve Gear | Walschaert |
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 / 1200 |
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 Volume | 317.35 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 3182 |
Same as above plus superheater percentage | 3182 |
Same as above but substitute firebox area for grate area | |
Power L1 | |
Power MT |