Baden State / Braunschweig State 2-6-2 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class BR 46 / BR 75.6 (Locobase 4933)

Described on the Hildesheim Peine Kreiseisenbahn (HPKE) website [] (first accessed December 2001; later http://www.hpke.de/, last accessed 12 October 2022); and "BLE 45 bis 49" in Wikipedia at [], last accessed 12 October 2022. The locomotive database [], visited 3 June 2005, shows the class all came from Krupp as follows:

Year Works # Braun # DRG #

1935 1458 45 75 601

1935 1500 46 75 602

1937 1712 47 75 603

1937 1713 48 75 604

1935 1514 49 75 605

Introduced on the BLE to handle passenger trains on the Gliesmarode-Fallersleben and Derneburg-Seesen runs as well as handling freight and even hump shunting.

According to the HKPE's extensive notes on all of their locomotives, these were grouped in Class 75 under the ReichsBahn along with other light Prairies. Once there, they were found unable to reach 75 kph (46.6 mph).

Both operated under the German National Railways from 1938 to 1947. 46 ran on the Braunschweig Schoeninger from 1947-1959, then on the Moselbahn (1959-1963), then on the HKPE (1963-1964), then back to the Braunschweig Schoeninger until 1970, when it was scrapped. 49 spent most of its career on the Braunschweig Schoeninger; its time on the HKPE came in 1964-1965. It was scrapped in 1971.


Class VIb / BR 75.1 (Locobase 5942)

Christian Lindecke [] (visited 28 November 2003) for data. Additional data from US Military Railway Service Equipment Data Book -- German Locomotives supplied by Allen Stanley from his extensive Rail Data Exchange in March 2004. Lindecke gives 1.92 sq m (20.66 sq ft) for the grate area; the MRS book insists on the specs figure, which equates to 1.83 sq m.

Maffei produced the first 15 of these Prairie tanks, but Kessler (MGK) supplied the rest of the class over the next two decades. Both carrying axles were Adams radial axle types. Lindecke notes that an identifying feature of this locomotive was the external connecting steam pipe between the two steam domes.

Most remained in service when the DRG created BauReihe 75 1. to 75.3 and 164 locomotives took that designation. 20 years later, 117 survivors of World War II continued to serve mixed-good traffic. Beginning in 1957, retirements gradually reduced the class's ranks but the last one didn't leave DB service until 1962 while those in DR (East German) service carried on until 1965.


Class VIc / BR 75.10-11 (Locobase 5944)

This was the 1921 version of the VIc superheated Prairie tanks (Locobase 5943). Information comes from [] (visited 2 March 2004). Additional data from US Military Railway Service Equipment Data Book -- German Locomotives supplied from the extensive collection of Allen Stanley (March 2004).

The basic design of this burly engine remained unchanged, but the frame was reinforced and the axle loading went up to 17 metric tons (37,479 lb). They proved to be capable of rapid acceleration and fit in well in the DRG's passenger network. As with the 1914 VIc, this group survived well into the 1960s.


Class VIc / BR 75.4 (Locobase 5943)

Christian Lindecke [] (visited 28 November 2003) for data. Additional data from US Military Railway Service Equipment Data Book -- German Locomotives supplied from the extensive collection of Allen Stanley (March 2004). Lindecke's data gives 2.12 sq m (22.81 sq ft) for the grate and slightly different heating surface data.

However good the VI b class of saturated-steam Prairie tanks might be, superheating can make it better. And in the process of designing the superheated counterpart, MGK enlarged the boiler and grate. Cylinder diameter grew as did the the stroke. Even though the boiler pressure was slightly reduced and the drivers were taller, the result was a more powerful locomotive.

The design retained the Adams radial axle boxes that improved the locomotive's ability to get around tight curves. Some of the VIc were turned over to France as part of a 28-locomotive reparations stud. The DRG took in 107 as BR 75 4. The class remained in service in Germany (West and East) into the 1960s with the last DB engine leaving in 1967 and the last in East German (DR) in 1968.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassBR 46 / BR 75.6VIb / BR 75.1VIc / BR 75.10-11VIc / BR 75.4
Locobase ID4933 5942 5944 5943
RailroadBraunschweig StateBaden StateBaden StateBaden State
CountryGermanyGermanyGermanyGermany
Whyte2-6-22-6-2T2-6-2T2-6-2T
Number in Class51735679
Road Numbers45-49/75 601-75 605
GaugeStdStdStdStd
Number Built51735679
BuilderKruppseveralKarlsruheKessler
Year1935190019211914
Valve GearHeusingerHeusingerHeusingerHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.81 / 3.6011.15 / 3.40
Engine Wheelbase (ft / m)29.53 / 927.56 / 8.40
Ratio of driving wheelbase to overall engine wheelbase 0.40 0.40
Overall Wheelbase (engine & tender) (ft / m)29.53 / 927.56 / 8.40
Axle Loading (Maximum Weight per Axle) (lbs / kg)35,803 / 16,24031,747 / 14,40037,038 / 16,80037,479 / 17,000
Weight on Drivers (lbs / kg)107,365 / 48,70093,035 / 42,200111,554 / 50,600105,381 / 47,800
Engine Weight (lbs / kg)165,347 / 75,000143,962 / 65,300175,267 / 79,500164,685 / 74,700
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)143,962 / 65,300175,267 / 79,500164,685 / 74,700
Tender Water Capacity (gals / ML)2455 / 9.302640 / 10
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)60 / 3052 / 2662 / 3159 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53.10 / 134958.30 / 148063 / 160063 / 1600
Boiler Pressure (psi / kPa)203.10 / 14184.20 / 12.70174 / 12174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)19.69" x 25.98" / 500x66017.17" x 24.8" / 436x63021.26" x 25.2" / 540x64021.26" x 25.2" / 540x640
Tractive Effort (lbs / kg)32,747 / 14853.8119,635 / 8906.3026,740 / 12129.0726,740 / 12129.07
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.28 4.74 4.17 3.94
Heating Ability
Tubes (number - dia) (in / mm)103 - 1.772" / 45
Flues (number - dia) (in / mm)32 - 5.236" / 133
Flue/Tube length (ft / m)13.12 / 413.29 / 4.0513.29 / 4.0513.29 / 4.05
Firebox Area (sq ft / m2)96.88 / 986.08 / 893.61 / 8.7088.77 / 8.25
Grate Area (sq ft / m2)22.28 / 2.0719.69 / 1.8322.81 / 2.1222.81 / 2.12
Evaporative Heating Surface (sq ft / m2)1123 / 104.301250 / 116.211114 / 103.521132 / 105.22
Superheating Surface (sq ft / m2)431 / 40438 / 40.75463 / 43.02
Combined Heating Surface (sq ft / m2)1554 / 144.301250 / 116.211552 / 144.271595 / 148.24
Evaporative Heating Surface/Cylinder Volume122.65188.08107.59109.33
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4525362739693969
Same as above plus superheater percentage5792362750805120
Same as above but substitute firebox area for grate area25,18615,85620,84919,925
Power L110,7704525974710,134
Power MT663.45321.68577.88636.02

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