Christian Lindecke's website [] (visited 28 Nov 2003) (translated by Google), supplemented by [
], last accessed 12 May 2011.
Lindecke shows that this is the compound variant of the B XIs profiled in Locobase 5691.
This class had a rating of 270 tons at 75 km/h (47 mph) on the level and 50 km/h (31 mph) with 260 tons climbing a 1/2% grade. The extra power came at least in part from a higher-pressure boiler. The larger grate may have added more steaming endurance. In any case, the class filled the bill admirably. More than 3/4 of the original class was renumbered by the DRG in 1923, being designated 36 751-36 826. By 1931, however, all of the class had been withdrawn.
Profiled in the American Engineer and Railroad Journal for July 1894, this class had only recently entered service on the Bavarian State.The outline sketch published as part of the article shows a plate frame, tapered stack, large steam dome with outside pipe to cylinders, and widespread bogie.
This is most likely the 39-engine class described as Class BXI on Christian Lindecke's website [] (visited 28 November 2003) (translated by Google). The areas for Lindecke's engines are a bit smaller, however, although most of the dimensions are close.These simple-expansion locomotives were part of a larger B XI class that included compound engines. The simples were rated at 200 tons at 75 km/h (47 mph) on the level and 50 km/h (31 mph) with the same load climbing a 1/2% grade.
Eight survived long enough to receive DRG numbers 36 701-708, but all were out of service by 1926.
The compound version is found in Locobase 5922.
Data from "Baureihe 36 861" from Albert Gieseler's Dampfmaschinen und Lokomotiven website at [], last accessed 3 October 2019.
Locobase 20644 shows the original, unusual conversion of a B XI compound express locomotive to a 4-(2)-2-2 arrangement with auxiliary axle for low-speed pulling power. Although technically successful, the engine remained alone. An accident damaged the AA 1 sufficiently to merit rebuilding, but without the auxiliary booster axle.
Instead, the shops took the opportunity to fit a B XI with superheater, probably to determine if the rest of the class should be converted as well. The installation blessed a relatively small boiler with a considerable amount of dry steam. Even so, the answer apparently was "no" and the 1400 ran as a lone 2'B 2h.
Although given a Deutsches Reichsbahn Baurehei designation in 1925, it was retired in the same year.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | B XI (v)/ BR 36.7-8 | B XI/BR 36.7 | P 2/4 Umbau//BR 36 861 |
Locobase ID | 5922 | 5691 | 20645 |
Railroad | Bavarian State | Bavarian State | Bavarian State |
Country | Germany | Germany | Germany |
Whyte | 4-4-0 | 4-4-0 | 4-4-0 |
Number in Class | 100 | 39 | 1 |
Road Numbers | 1241-1339 | BR 36 701-08 | 1400 |
Gauge | Std | Std | Std |
Number Built | 100 | 39 | |
Builder | Maffei | Maffei | Bavarian |
Year | 1895 | 1891 | 1908 |
Valve Gear | Walschaert | Walschaert | Walschaert |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 8.37 / 2.55 | 8.36 / 2.55 | 8.17 / 2.49 |
Engine Wheelbase (ft / m) | 21.88 / 6.67 | 21.88 / 6.67 | 24.28 / 7.40 |
Ratio of driving wheelbase to overall engine wheelbase | 0.38 | 0.38 | 0.34 |
Overall Wheelbase (engine & tender) (ft / m) | 46.24 / 14.10 | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 31,747 / 14,400 | 30,870 / 14,002 | 32,849 / 14,900 |
Weight on Drivers (lbs / kg) | 63,493 / 28,800 | 61,740 / 28,005 | 65,698 / 29,800 |
Engine Weight (lbs / kg) | 112,436 / 51,000 | 108,542 / 49,234 | 113,979 / 51,700 |
Tender Loaded Weight (lbs / kg) | 64,000 / 29,030 | ||
Total Engine and Tender Weight (lbs / kg) | 172,542 / 78,264 | ||
Tender Water Capacity (gals / ML) | 4752 / 18 | 3828 / 14.50 | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7.20 / 7 | 6 / 6 | 6.60 / 6 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 | 51 / 25.50 | 55 / 27.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 73.60 / 1870 | 73 / 1854 | 73.60 / 1870 |
Boiler Pressure (psi / kPa) | 188.50 / 1300 | 184.20 / 1270 | 188.50 / 1300 |
High Pressure Cylinders (dia x stroke) (in / mm) | 17.91" x 24.02" / 455x610 (1) | 17" x 24" / 432x610 | 17.91" x 24.02" / 455x610 |
Low Pressure Cylinders (dia x stroke) (in / mm) | 26.38" x 24.02" / 670x610 (1) | ||
Tractive Effort (lbs / kg) | 11,481 / 5207.70 | 14,876 / 6747.65 | 16,773 / 7608.11 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.53 | 4.15 | 3.92 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 226 - 1.575" / 40 | 218 - 1.77" / 45 | 118 - 1.614" / 41 |
Flues (number - dia) (in / mm) | 18 - 4.646" / 118 | ||
Flue/Tube length (ft / m) | 12.40 / 3.78 | 12.80 / 3.90 | 12.40 / 3.78 |
Firebox Area (sq ft / m2) | 102.26 / 9.50 | 106.50 / 9.90 | 96.88 / 9 |
Grate Area (sq ft / m2) | 24.33 / 2.26 | 23.68 / 2.20 | 24.33 / 2.26 |
Evaporative Heating Surface (sq ft / m2) | 1257 / 116.80 | 1415 / 131.51 | 1018 / 94.60 |
Superheating Surface (sq ft / m2) | 289 / 26.85 | ||
Combined Heating Surface (sq ft / m2) | 1257 / 116.80 | 1415 / 131.51 | 1307 / 121.45 |
Evaporative Heating Surface/Cylinder Volume | 358.94 | 224.42 | 145.35 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 4586 | 4362 | 4586 |
Same as above plus superheater percentage | 4586 | 4362 | 5595 |
Same as above but substitute firebox area for grate area | 19,276 | 19,617 | 22,279 |
Power L1 | 5382 | 6922 | 13,547 |
Power MT | 373.75 | 494.34 | 909.19 |