Mittel Thurgaubahn 2-6-2 Locomotives in Switzerland
Class Details by Steve Llanso of Sweat House Media
Class Ec 3/5 (Locobase 5671)
[
] (visited 6 October 2003) and [] (last accessed 8 May 2010) is the source for this quartet.
The site noted that the class was built specifically to conquer the difficult grades on the Thurgau line. Rated at a maximum speed of 60 km/h (36 mph) and a tonnage rating of 200 tons up a 2% grade, these compact, low-drivered Prairie tanks served for decades.
1, 2, and 4 were scrapped, but 3 (SLM works number 2263) was somehow spared long enough to be restored beginning in 1992. She received a new boiler, and new cylinders. As of 2000, a boiler inspection of #3 cleared her to operate on all Swiss railway lines.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Ec 3/5 |
| Locobase ID | 5671 |
| Railroad | Mittel Thurgaubahn |
| Country | Switzerland |
| Whyte | 2-6-2T |
| Number in Class | 4 |
| Road Numbers | 1-4 |
| Gauge | Std |
| Number Built | 4 |
| Builder | SLM |
| Year | 1912 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 23.29 / 7.10 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 80,469 / 36,500 |
| Engine Weight (lbs / kg) | 115,522 / 52,400 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1452 / 5.50 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.80 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 45 / 22.50 |
| 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) | 17.13" x 23.62" / 435x600 |
| Tractive Effort (lbs / kg) | 21,180 / 9607.10 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.80 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 86.08 / 8 |
| Grate Area (sq ft / m2) | 16.68 / 1.55 |
| Evaporative Heating Surface (sq ft / m2) | 850 / 79 |
| Superheating Surface (sq ft / m2) | 237 / 22 |
| Combined Heating Surface (sq ft / m2) | 1087 / 101 |
| Evaporative Heating Surface/Cylinder Volume | 134.91 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2902 |
| Same as above plus superheater percentage | 3541 |
| Same as above but substitute firebox area for grate area | 18,273 |
| Power L1 | 7604 |
| Power MT | 624.98 |