Mecklenburg / Mecklenburg State Railways 0-6-0 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class T 7 / 99 30 (Locobase 6536)

Data from Christian Lindecke's [] (visited 27 May 2005), supplemented by [], last accessed on 12 May 2011. Delivered in 1910 (works #9845), 1911 (10699), and 1914 (12884).

Tiny locomotive with a light footprint running on a relatively unusual gauge.


Class T3a & T3b / BR 89.80 (Locobase 5741)

Data from [], last accessed on 14 May 2011.

Virtually identical to the KPEV (Prussian) T3s, this class began entering service on the Mecklenburg Friedrich Franz Eisenbahn (MFFE) in 1884. The design took two forms, differing primarily in a larger wheel diameter (1,150 mm/45.3") in the T3b. One other difference, according to the home.t-online.de/home/05820678-0001 website (visited 10 September 2002), was in its steam regulator. The T3a had a small housing for the regulator only just behind the stack, while the T3b had a larger steam dome a little farther back along the dome.

When the Deutsche Reichsbahn (DRG) was formed in 1925 and all locomotives received numerical class IDs, the MFFE T-3s (then designated Gt33.10/11) became BauReihe (BR) 89.80.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassT 7 / 99 30T3a & T3b / BR 89.80
Locobase ID6536 5741
RailroadMecklenburg (MFFE)Mecklenburg State Railways (MFFE)
CountryGermanyPrussia
Whyte0-6-0T0-6-0T
Number in Class365
Road Numbers1005-1007 / 99 301-303
Gauge90 cmStd
Number Built365
BuilderHenschel & Sohnseveral
Year19101884
Valve GearStephensonAllan
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.91 / 1.80 9.84 / 3
Engine Wheelbase (ft / m) 5.91 / 1.80 9.84 / 3
Ratio of driving wheelbase to overall engine wheelbase11
Overall Wheelbase (engine & tender) (ft / m) 5.91 / 1.8010.83 / 3.30
Axle Loading (Maximum Weight per Axle) (lbs / kg)11,905 / 5400
Weight on Drivers (lbs / kg)35,715 / 16,20067,902 / 30,800
Engine Weight (lbs / kg)35,715 / 16,20067,902 / 30,800
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)35,715 / 16,20067,902 / 30,800
Tender Water Capacity (gals / ML)449 / 1.701056 / 4
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 0.90 / 1 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)20 / 1038 / 19
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)27.60 / 70043.30 / 1100
Boiler Pressure (psi / kPa)174 / 12175.50 / 12.10
High Pressure Cylinders (dia x stroke) (in / mm)10.24" x 15.75" / 260x40013.78" x 21.65" / 350x550
Tractive Effort (lbs / kg)8850 / 4014.3014,163 / 6424.24
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.04 4.79
Heating Ability
Tubes (number - dia) (in / mm)98 - 1.575" / 40133 - 1.811" / 46
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.22 / 2.2010.63 / 3.24
Firebox Area (sq ft / m2)28.41 / 2.6452.19 / 4.85
Grate Area (sq ft / m2) 6.03 / 0.5614.53 / 1.35
Evaporative Heating Surface (sq ft / m2)328 / 30.50645 / 59.94
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)328 / 30.50645 / 59.94
Evaporative Heating Surface/Cylinder Volume218.48172.59
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation10492550
Same as above plus superheater percentage10492550
Same as above but substitute firebox area for grate area49439159
Power L125063070
Power MT464.07299.03

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