Brunswick 2-4-0 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class Oker (Locobase 10291)

Data from "German Locomotive Works", The Locomotive Magazine, Vol VIII (7 March 1903), p. 168

Named for the river that flowed through the area, this locomotive was works number 74 in the Hannover books. Its profile included a tall stack, tall dome with safety valve just behind the stack and over the carrying axle, straight boiler with raised firebox, outside cylinders, and closely spaced drivers ahead of the firebox.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassOker
Locobase ID10291
RailroadBrunswick
CountryGermany
Whyte2-4-0
Number in Class
Road Numbers
GaugeStd
Number Built
BuilderHannover
Year1854
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.50 / 1.68
Engine Wheelbase (ft / m)11.50 / 3.51
Ratio of driving wheelbase to overall engine wheelbase 0.48
Overall Wheelbase (engine & tender) (ft / m)22.92 / 6.99
Axle Loading (Maximum Weight per Axle) (lbs / kg)21,280 / 9652
Weight on Drivers (lbs / kg)42,560 / 19,305
Engine Weight (lbs / kg)62,384 / 28,297
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)57.60 / 1463
Boiler Pressure (psi / kPa)120 / 8.30
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)10,880 / 4935.09
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.91
Heating Ability
Tubes (number - dia) (in / mm)151 - 1.875" / 48
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)75 / 6.97
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)1115 / 103.62
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1115 / 103.62
Evaporative Heating Surface/Cylinder Volume199.64
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area9000
Power L13073
Power MT318.36

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