Data from Maurice Demoulin, Locomotive Actuelle ... (Paris: Librairie Polytechnique Ch.Beranger, 1906), p 239-240, supplemented and slightly amended by [], last accessed 14 May 2011.
After trying out the Vauclain compounds, Bavaria bought 10 locomotives from Maffei that were of a more standard 4-cylinder compound layout in which each valve-cylinder combination had its own valve gear and drove on its own crosshead. LP cylinders were outside, HP inside. Anton Hammel, Maffei's chief designer, modeled his frame construction after the American engines' bar frame.
These racers pulled 250 tons on the level at 70 mph (110 kph) and headed up the Orient Express and the North-South Express. But, Joost Wilbrink ([]) notes, Bavarian route profiles had very little flat running in them and these engines went to the Pfalz in 1911. Five were left for the DRG to take up in the 1920s.
Data from Christian Lindecke [], first accessed 20 December 2003. Additional data from Maurice Demoulin, Locomotive Actuelle ... (Paris: Librairie Polytechnique Ch.Beranger, 1906), p 240, which gives a larger figure for the heating surface that Locobase adopts; and DeGolyer, Volume 23, p. 159. (Thanks to Ivo Ruitishauser for his 26 September 2024 email reporting the Bay State's road numbers and the proper definition(s) for BR.) Works numbers were 18380-18381 in November 1900.
These were two Vauclain compounds with 13" (330 mm) piston valves imported by the Bavarian railway as their first compounds.
Upon its formation in 1923, the Deutsches Reichsbahn-Geselleschaft (DRG) created the Baureihe (literally translating as "build class", according to Ivo Rutishauser) for this pair. Although recorded, the two retired in the same year and never operated under those numbers.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | S 2/5 / BR 14.1 | S 2/5 // BR 14.1 |
Locobase ID | 3875 | 3874 |
Railroad | Bavarian State | Bavarian State |
Country | Germany | Germany |
Whyte | 4-4-2 | 4-4-2 |
Number in Class | 10 | 2 |
Road Numbers | 3001-3010 / BR 14 141-BR 145 | 2398-2399/BR 14 131-14.132 |
Gauge | Std | Std |
Number Built | 10 | 2 |
Builder | Maffei | Burnham, Williams & Co |
Year | 1904 | 1900 |
Valve Gear | Heusinger | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 7.38 / 2.25 | 6.75 / 2.06 |
Engine Wheelbase (ft / m) | 28.38 / 8.65 | 25.42 / 7.75 |
Ratio of driving wheelbase to overall engine wheelbase | 0.26 | 0.27 |
Overall Wheelbase (engine & tender) (ft / m) | 54.83 / 16.71 | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,274 / 16,000 | 35,274 / 16,000 |
Weight on Drivers (lbs / kg) | 70,548 / 32,000 | 70,548 / 32,000 |
Engine Weight (lbs / kg) | 151,237 / 68,600 | 132,718 / 60,200 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | ||
Tender Water Capacity (gals / ML) | 5808 / 22 | 5549 / 21.02 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 | 59 / 29.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 78.70 / 2000 | 72 / 1829 |
Boiler Pressure (psi / kPa) | 232.10 / 1600 | 203.10 / 1400 |
High Pressure Cylinders (dia x stroke) (in / mm) | 13.39" x 25.2" / 340x640 | 13" x 26" / 330x660 |
Low Pressure Cylinders (dia x stroke) (in / mm) | 22.44" x 25.2" / 570x640 | 22" x 26" / 560x660 |
Tractive Effort (lbs / kg) | 16,705 / 7577.27 | 15,618 / 7084.21 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.22 | 4.52 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 278 - 1.89" / 48 | 264 - 2" / 51 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 14.93 / 4.55 | 15 / 4.57 |
Firebox Area (sq ft / m2) | 156.02 / 14.50 | 148.27 / 13.78 |
Grate Area (sq ft / m2) | 35.29 / 3.28 | 30.45 / 2.83 |
Evaporative Heating Surface (sq ft / m2) | 2211 / 205.50 | 2210 / 205.39 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 2211 / 205.50 | 2210 / 205.39 |
Evaporative Heating Surface/Cylinder Volume | 538.33 | 553.29 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 8191 | 6184 |
Same as above plus superheater percentage | 8191 | 6184 |
Same as above but substitute firebox area for grate area | 36,212 | 30,114 |
Power L1 | 7894 | 6288 |
Power MT | 493.37 | 393.00 |