Solvay & Co 0-4-0 Locomotives in Germany

Class Details by Steve Llanso of Sweat House Media

Class Ernst (Locobase 21064)

Data from "2/2 gek. Guterzug-Locomotive fur normal Spurweite-Konigliche Ostbahn", (Tegel bei Berlin, 1878), p. 29. See also Solvay's history on its web page at [], last accessed 7 August 2022. Works numbers were 3910 in December 1883 and 4237 in May 1887.

One can correctly infer that the two industrial tank engines were named for the two brothers who founded the company. The small 20-tonners served Solvay-Werke's soda ash and bicarbonate plant in Bernburg. Ernst Solvay had applied for a patent for a process that produced soda ash using salt, ammonia, and carbonic acid. Turned down for lack of novelty, Ernst consuclted with a lawyer who advised him to apply to patent the particular succession fo equipment and operations. This variant proved successful in 1863.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID21064
RailroadSolvay & Co
Number in Class2
Road Numbers
Number Built2
Valve GearAllan
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)39,683 / 18,000
Engine Weight (lbs / kg)39,683 / 18,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)39,683 / 18,000
Tender Water Capacity (gals / ML)528 / 2
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.30 / 1.20
Minimum weight of rail (calculated) (lb/yd / kg/m)33 / 16.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)31.50 / 800
Boiler Pressure (psi / kPa)174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)10.24" x 16.54" / 260x420
Tractive Effort (lbs / kg)8143 / 3693.61
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.87
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2) 7.21 / 0.67
Evaporative Heating Surface (sq ft / m2)408 / 37.90
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)408 / 37.90
Evaporative Heating Surface/Cylinder Volume258.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1255
Same as above plus superheater percentage1255
Same as above but substitute firebox area for grate area
Power L1
Power MT

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