Zell-und-Todtnau Articulated Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class 103 (Locobase 3255)
Data from Gustav Reder (Michael Reynolds, trans), The world of steam locomotives (New York: Putnam, 1974), pl 329; supplemented by SACM diagram UG Type 178 from Elsassische Maschinenbau AG from locomotive book supplied by Dany Machi at [
] as
Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007). Works number was 4738
Reder cited this engine as an example of the early application of the Mallet layout on a narrow-gauge rail line.
The Z&T ran in the Black Forest and Grafenstaden supplied this Mallet design in 1896. According to the Todtnauer website -- [], last accessed 24 October 2006 -- the Z&T operated the 103 until 1955, when it was sold to the M.E.G. Stammbahn in Schwarzach. It was scrapped in 1960.
NB: the heating surface area in the diagram is calculated from the fire side. Water-side area would be 491 sq ft (45.6 sq m).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 103 |
| Locobase ID | 3255 |
| Railroad | Zell-und-Todtnau |
| Country | Germany |
| Whyte | 0-4-4-0T |
| Number in Class | 1 |
| Road Numbers | 103 |
| Gauge | Metre |
| Number Built | 1 |
| Builder | Grafenstaden |
| Year | 1896 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 3.77 / 1.15 |
| Engine Wheelbase (ft / m) | 13.12 / 4 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.29 |
| Overall Wheelbase (engine & tender) (ft / m) | 13.12 / 4 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 61,443 / 27,870 |
| Engine Weight (lbs / kg) | 61,443 / 27,870 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 61,443 / 27,870 |
| Tender Water Capacity (gals / ML) | 1056 / 4 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.10 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 26 / 13 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 35.40 / 900 |
| Boiler Pressure (psi / kPa) | 179.80 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9.84" x 17.72" / 250x450 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 14.96" x 17.72" / 380x450 |
| Tractive Effort (lbs / kg) | 10,341 / 4690.60 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.94 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 89 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.83 / 3.30 |
| Firebox Area (sq ft / m2) | 44.35 / 4.12 |
| Grate Area (sq ft / m2) | 8.07 / 0.75 |
| Evaporative Heating Surface (sq ft / m2) | 452 / 41.95 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 452 / 41.95 |
| Evaporative Heating Surface/Cylinder Volume | 289.81 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1451 |
| Same as above plus superheater percentage | 1451 |
| Same as above but substitute firebox area for grate area | 7974 |
| Power L1 | 1983 |
| Power MT | 284.61 |