Data from "Working Heavy Grades in Switzerland", Locomotive Engineers' Monthly Journal, Vol 9, No 8 (August 1875), p. 405.
When Swiss promoters of the spectacular view 1,300 feet (396 metres) above Lake Zurich began planning a tourist railway to scale the mountain's flanks, they settled on adhesion-only traction for the 5 1/2 miles (9.1 km). 59% of the entire line climbed at more than 264 feet/mile (50 metres/km) or 5%. Curve radii of 450-500 feet (137.1-152.4 m) ruled with one 450-ft curve combining with a rise of 327 feet (62 m/km) or 6.2%.
Each train would be pulled by one of these tanks and consisted of four cars carrying 40 passengers each for a trailing load of 17,500 kg (38,581 lb). Climbing speeds averaged 8.1-10.6 (13-17 km/h). A compressed-air system already in use on the Rigi Railroad permitted descents at 15.5-18.6 km/h (25-30 km/h)
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 15544 |
| Railroad | Mount Uetliberg |
| Country | Switzerland |
| Whyte | 0-6-0T |
| Number in Class | 3 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 3 |
| Builder | Krauss |
| Year | 1875 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6.73 / 2.05 |
| Engine Wheelbase (ft / m) | 6.73 / 2.05 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 6.73 / 2.05 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 55,116 / 25,000 |
| Engine Weight (lbs / kg) | 55,116 / 25,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 55,116 / 25,000 |
| Tender Water Capacity (gals / ML) | 858 / 3.25 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.70 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 31 / 15.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 35.80 / 909 |
| Boiler Pressure (psi / kPa) | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12.6" x 21.46" / 320x545 |
| Tractive Effort (lbs / kg) | 13,752 / 6237.81 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.01 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 770 / 71.53 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 770 / 71.53 |
| Evaporative Heating Surface/Cylinder Volume | 248.62 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |