Sachsische 2-4-0 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class VIb V / BR 34.8 (Locobase 14735)

Data from . See also Wikipedia's entry on the VIb V at [] and Christian Lindecke's website and [].

These short-coupled express engines resulted from a trial of the Afrika, a prototype the von Borries system of cross-compounding. Like the Prussian S1 of the same period, the Afrika's cylinders were placed behind the lead truck and drove on the rear axle. Unlike the S1s, which used outside Walschaert gear, the VIb was fitted with Allan straight-link motion inside.

When tested against the 735, a simple-expansion duplicate, the Afrika burned 20% less coal.

Twelve more compounds appeared in 1888 (6) and 1890 (6). All were named for African locations (Port Said, Kamerun, etc.). They remained in service until 1922-1925. Only one was given a DRG BauReihe class ID.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassVIb V / BR 34.8
Locobase ID14735
RailroadSachsische
CountryGermany
Whyte2-4-0
Number in Class14
Road Numbers161-174/BR 34 8011
GaugeStd
Number Built14
BuilderHartmann
Year1886
Valve GearAllan
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.12 / 4
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)32.97 / 10.05
Axle Loading (Maximum Weight per Axle) (lbs / kg)29,983 / 14,600
Weight on Drivers (lbs / kg)64,375 / 29,200
Engine Weight (lbs / kg)93,476 / 42,400
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)2640 / 10
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.60 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)74.20 / 1885
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)17.32" x 22.05" / 440x560 (1)
Low Pressure Cylinders (dia x stroke) (in / mm)25.59" x 22.05" / 650x560 (1)
Tractive Effort (lbs / kg)9042 / 4101.39
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.12
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)75.35 / 7
Grate Area (sq ft / m2)19.59 / 1.82
Evaporative Heating Surface (sq ft / m2)1055 / 98
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1055 / 98
Evaporative Heating Surface/Cylinder Volume350.92
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3409
Same as above plus superheater percentage3409
Same as above but substitute firebox area for grate area13,111
Power L14694
Power MT321.51

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