Mecklenburg Friedrich Franz 2-4-0 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class III - 1864 (Locobase 11565)

Data from [link], last accessed 6 August 2010.

The singles shown in Locobases 11561-11564 quickly proved overmatched by the increase in passenger traffic. So the MFFE went to the well-known Chemnitz builder for 12 of their 6-wheeled passenger engines. Although they were small for the time, they had relatively tall drivers. The big cylindrical steam dome sat on the boiler ahead of the lead copu;led axle.

The 1866 locomotives had slightly higher boiler pressures, but were otherwise identical. The 1869s had longer tubes, however, and are shown in Locobase 11566.

All of the class remained in service for more than 35 years and the last retired in 1910.


Class III - 1869 (Locobase 11566)

Data from [link], last accessed 6 August 2010.

The twelve Hartmanns that arrived on the MFFE in 1864-1866 (Locobase 11565) to improve passenger-train pulling power were joined in 1869 by this class of very similar locomotives that had tubes measuring 0.2 metres (7.9") longer and had boilers pressed to 1 1/2 bar (21 psi) more.

They were still on the small side for the wheel arrangement, but still possessed relatively tall drivers. Locomotive and railway proved a good fit and the class only retired in 1903-1910.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassIII - 1864III - 1869
Locobase ID11565 11566
RailroadMecklenburg Friedrich Franz (MFFE)Mecklenburg Friedrich Franz (MFFE)
CountryPrussiaPrussia
Whyte2-4-02-4-0
Number in Class127
Road Numbers12-2324-30
GaugeStdStd
Number Built127
BuilderHartmannHartmann
Year18641869
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)14.42 / 4.3914.42 / 4.39
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)32.77 / 9.9932.77 / 9.99
Axle Loading (Maximum Weight per Axle) (lbs / kg)25,133 / 11,40025,133 / 11,400
Weight on Drivers (lbs / kg)50,268 / 22,80150,268 / 22,801
Engine Weight (lbs / kg)74,737 / 33,90074,737 / 33,900
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1175 / 4.451175 / 4.45
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.30 / 3 3.30 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)42 / 2142 / 21
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)73.60 / 187073.60 / 1870
Boiler Pressure (psi / kPa)105.90 / 730127.60 / 880
High Pressure Cylinders (dia x stroke) (in / mm)15.98" x 22.05" / 406x56015.98" x 22.05" / 406x560
Tractive Effort (lbs / kg)6887 / 3123.898298 / 3763.91
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.30 6.06
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.20 / 3.1110.86 / 3.31
Firebox Area (sq ft / m2)83.71 / 7.7883.71 / 7.78
Grate Area (sq ft / m2)13.45 / 1.2513.45 / 1.25
Evaporative Heating Surface (sq ft / m2)855 / 79.42908 / 84.40
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)855 / 79.42908 / 84.40
Evaporative Heating Surface/Cylinder Volume167.04177.40
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation14241716
Same as above plus superheater percentage14241716
Same as above but substitute firebox area for grate area886510,681
Power L132324057
Power MT283.49355.86

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