Berlin-Potsdam-Magdeburger 2-4-0 Locomotives in Germany

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 13216)

Data from W H Maw and William Dredge, "Locomotives", Reports on the Vienna Universal Exhibition, Part II (London: George Eyre and William Spottiswoode, 1874), pp. 418-419.419; and "Locomotives at the Vienna Exhibition--No. IV", Engineering (27 June 1873), p. 467.Works numbers were 2997-2999, 3008, and 3031-3035 in 1873.

Maw and Dredge note that one of the locomotives displayed at the Vienna Exhibition was Borsig's 3,031st locomotive. The authors were quite taken with the level of workmanship in this locomotive, "...the brasswork and the coppersmiths' work, in particular, being of unusual excellence. The whole engine was distinguished by that attention to material finish which especially characterizes the productions of experienced builders."

Engineering commented that the boiler used a Belapaire firebox. It also praised the engine as "altogether ...on which will no doubt do good work wtih fast trains", but observed "the arrangement with outside frames and cranks undoubtedly leads to the employment of greater weight than would be necessary" for an inside-frame locomotive using a "crank pin fixed in the wheel bosses in the ordinary way."

NB: Heating surface areas in the specifications are given in the original as derived from the water-side diameter of the tubes.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID13216
Number in Class9
Road Numbers220, 227-231
Number Built9
Valve GearAllan
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.73 / 2.05
Engine Wheelbase (ft / m)14.44 / 4.40
Ratio of driving wheelbase to overall engine wheelbase 0.47
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)27,117 / 12,300
Weight on Drivers (lbs / kg)54,013 / 24,500
Engine Weight (lbs / kg)80,910 / 36,700
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)45 / 22.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)76.40 / 1940
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)16.93" x 22.05" / 430x560
Tractive Effort (lbs / kg)10,196 / 4624.83
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.30
Heating Ability
Tubes (number - dia) (in / mm)169 - 1.969" / 50
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.14 / 3.70
Firebox Area (sq ft / m2)76.61 / 7.12
Grate Area (sq ft / m2)22.17 / 2.06
Evaporative Heating Surface (sq ft / m2)1136 / 105.60
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1136 / 105.60
Evaporative Heating Surface/Cylinder Volume197.73
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3215
Same as above plus superheater percentage3215
Same as above but substitute firebox area for grate area11,108
Power L14882
Power MT398.53

All material Copyright ©
Wes Barris