Bottwarbahn / Wuerttemburg State 0-8-0 Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class Tss4 / BR 99.62 (Locobase 11358)
Data from Wikipedia, [
], last accessed 13 June 2010.
The narrow-gauge Bottwarbahn served the line between Beistein and Marbach am Neckar. Based on the earlier metre-gauge Ts4 (see Locobase 11359), the Tss4s had the same power dimensions, weighed less, but held more water and coal.
These little 8-coupleds suited the curvy alignment well. In part, this was due to the Klose kinematic linkage, which allowed considerable play in the inner two axles and drove the end axles through a linkage from the third axle. The Wikipedia editor comments that, as with other Klose installations, the concept worked well, but required a good deal of maintenance.
One of the three, Beilstein, was retired in 1923 before the DRG took over operation of the Bottwarbahn. The other two, originally named Gro+bottwar and Oberstenfel, were classed BR 99 621 and BR 99 622 and operated under the DRG until 1928.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Tss4 / BR 99.62 |
| Locobase ID | 11358 |
| Railroad | Bottwarbahn / Wuerttemburg State |
| Country | Germany |
| Whyte | 0-8-0T |
| Number in Class | 3 |
| Road Numbers | 11-13 / 99 621-99 622 |
| Gauge | 75 cm |
| Number Built | 3 |
| Builder | Esslingen |
| Year | 1894 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.76 / 4.50 |
| Engine Wheelbase (ft / m) | 14.76 / 4.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 14.76 / 4.50 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 15,565 / 7060 |
| Weight on Drivers (lbs / kg) | 61,112 / 27,720 |
| Engine Weight (lbs / kg) | 61,112 / 27,720 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 792 / 3 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.30 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 25 / 12.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 35.40 / 900 |
| Boiler Pressure (psi / kPa) | 169.70 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13.39" x 19.69" / 340x500 |
| Tractive Effort (lbs / kg) | 14,385 / 6524.93 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.25 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 130 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.83 / 3.30 |
| Firebox Area (sq ft / m2) | 47.45 / 4.41 |
| Grate Area (sq ft / m2) | 10.54 / 0.98 |
| Evaporative Heating Surface (sq ft / m2) | 642 / 59.67 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 642 / 59.67 |
| Evaporative Heating Surface/Cylinder Volume | 200.06 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1789 |
| Same as above plus superheater percentage | 1789 |
| Same as above but substitute firebox area for grate area | 8052 |
| Power L1 | 2743 |
| Power MT | 395.82 |