Bavarian State 4-4-4 Locomotives in Germany
Class Details by Steve Llanso of Sweat House Media
Class S2/6 / BR 15.0 (Locobase 2141)
Data from "Four-Cylinder Compound Express for the Bavarian State Railroads," The Railroad Gazette, Vol XLI, No 8 (31 August 1906), pp. 185, supplemented by [
], last accessed 13 May 2011. See also Gustav Reder (Michael Reynolds, trans), The world of steam locomotives (New York: Putnam, 1974)
Single example designed by Hammel and exhibited at the Bavarian Jubilee Fair. In tests, the engine reached 154 km/h (96 mph), according to Reder. The cast-steel frame was a first in German practice. Although it was a one-only, it ran well in the Rheinland-Palatinate and earned the nickname "Zeppelin". Although the DRG adopted the locomotive and gave it a class ID of BR 15.0, this unique locomotive was soon retired and put on exhibit.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | S2/6 / BR 15.0 |
| Locobase ID | 2141 |
| Railroad | Bavarian State |
| Country | Germany |
| Whyte | 4-4-4 |
| Number in Class | 1 |
| Road Numbers | 3201 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Maffei |
| Year | 1906 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.61 / 2.32 |
| Engine Wheelbase (ft / m) | 38.39 / 11.70 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.20 |
| Overall Wheelbase (engine & tender) (ft / m) | 60.66 / 18.49 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,274 / 16,000 |
| Weight on Drivers (lbs / kg) | 70,548 / 32,000 |
| Engine Weight (lbs / kg) | 182,983 / 83,000 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 6869 / 26.02 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8.80 / 8 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 86.60 / 2200 |
| Boiler Pressure (psi / kPa) | 210.30 / 1450 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.14" x 25.2" / 410x640 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 24.02" x 25.2" / 610x640 |
| Tractive Effort (lbs / kg) | 18,671 / 8469.03 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.78 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 206 - 2.047" / 52 |
| Flues (number - dia) (in / mm) | 18 - 4.961" / 126 |
| Flue/Tube length (ft / m) | 16.08 / 4.90 |
| Firebox Area (sq ft / m2) | 177.54 / 16.50 |
| Grate Area (sq ft / m2) | 50.57 / 4.70 |
| Evaporative Heating Surface (sq ft / m2) | 2308 / 214.50 |
| Superheating Surface (sq ft / m2) | 404 / 37.55 |
| Combined Heating Surface (sq ft / m2) | 2712 / 252.05 |
| Evaporative Heating Surface/Cylinder Volume | 386.77 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 10,635 |
| Same as above plus superheater percentage | 12,230 |
| Same as above but substitute firebox area for grate area | 42,937 |
| Power L1 | 15,690 |
| Power MT | 980.62 |