Mansfelder BergwerksBahn 0-8-0 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class K44.9 (Locobase 13806)

Data from the [] datasheet, last accessed 31 January 2012. Works numbers were 12347-12

The engines were delivered to the complex of rail lines connecting the 13 mines, 6 smelters, and 2 transfer stations. Like other narrow-gauge lines in Germany, the MBB used "rollwagens" to carry standard-gauge freight cars on a platform rolling on trucks that ran on the 750-mm gauge line. At the transfer stations, these cars would roll off the rollwagen and onto their own wheels.

Note the square cylinder dimensions. The datasheet illustration shows a big, burly narrow-gauge engine.

The 7 was sold to the Rugener, but the others remained in service throughout World War II, transferred their flag to East Germany, and continued working for decades.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassK44.9
Locobase ID13806
RailroadMansfelder BergwerksBahn (MBB)`
CountryGermany
Whyte0-8-0T
Number in Class6
Road Numbers6-11
Gauge75 cm
Number Built6
BuilderOrenstein & Koppel
Year1931
Valve GearHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.84 / 3
Engine Wheelbase (ft / m) 9.84 / 3
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)21,385 / 9700
Weight on Drivers (lbs / kg)82,012 / 37,200
Engine Weight (lbs / kg)82,012 / 37,200
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)82,012 / 37,200
Tender Water Capacity (gals / ML)1030 / 3.90
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.90 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 17
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)31.50 / 800
Boiler Pressure (psi / kPa)227.70 / 15.70
High Pressure Cylinders (dia x stroke) (in / mm)15.75" x 15.75" / 400x400
Tractive Effort (lbs / kg)24,006 / 10888.95
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.42
Heating Ability
Tubes (number - dia) (in / mm)74 - 2.756" / 70
Flues (number - dia) (in / mm)12 - 1.772" / 45
Flue/Tube length (ft / m) 9.19 / 2.80
Firebox Area (sq ft / m2)64.58 / 6
Grate Area (sq ft / m2)16.15 / 1.50
Evaporative Heating Surface (sq ft / m2)606 / 56.30
Superheating Surface (sq ft / m2)280 / 26
Combined Heating Surface (sq ft / m2)886 / 82.30
Evaporative Heating Surface/Cylinder Volume170.63
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3677
Same as above plus superheater percentage4854
Same as above but substitute firebox area for grate area19,410
Power L111,609
Power MT1248.28

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