Brigue-Furka-Disentis Rack Railroad 2-6-0 Locomotives in Switzerland
Class Details by Steve Llanso of Sweat House Media
Class unknown (Locobase 5305)
Based on Google translation of [
] (visited 16 August 2002). The webpage had an article from Schweizerische Bauzeitung (Swiss Polytechnic Review) dated October 14, 1916 (Vol 68, #16).
The article describes the backround of this particular rack design, which is a modified Abt system. The innovation in the provision of two sets of cylinders. On those stretches where adhesion working was sufficient, the outside cylinders drove Hall-type cranks through Heusinger valve gear. When they entered the rack sections, the locomotives switched to compound working, adding inside cylinders which drove the rack pinion through Joy gear.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 5305 |
| Railroad | Brigue-Furka-Disentis Rack Railroad |
| Country | Switzerland |
| Whyte | 2-6-0RT |
| Number in Class | 10 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 10 |
| Builder | SLM |
| Year | 1916 |
| Valve Gear | various |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.15 / 3.40 |
| Engine Wheelbase (ft / m) | 17.49 / 5.33 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.64 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 92,638 / 42,020 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 686 / 2.60 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 35.80 / 909 |
| Boiler Pressure (psi / kPa) | 203.10 / 1400 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.54" x 18.9" / 420x480 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 22.05" x 17.72" / 560x450 |
| Tractive Effort (lbs / kg) | 31,164 / 14135.77 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 103 - 1.77" / 45 |
| Flues (number - dia) (in / mm) | 15 - 5" / 127 |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 73.49 / 6.83 |
| Grate Area (sq ft / m2) | 15.06 / 1.40 |
| Evaporative Heating Surface (sq ft / m2) | 717 / 66.64 |
| Superheating Surface (sq ft / m2) | 185 / 17.19 |
| Combined Heating Surface (sq ft / m2) | 902 / 83.83 |
| Evaporative Heating Surface/Cylinder Volume | 152.55 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3059 |
| Same as above plus superheater percentage | 3701 |
| Same as above but substitute firebox area for grate area | 18,060 |
| Power L1 | 4254 |
| Power MT | |