Koniglich SSchsischen Staats-Eisenbahn. 2-4-0 Locomotives in Germany

Class Details by Steve Llanso of Sweat House Media

Class Phoenix / I (Locobase 7912)

Data from [], accessed 26 October 2006.

Delivered as a tender engine, this outside-cylinder, inside-motion locomotive was converted in 1869 to a tank engine and renamed Psyche. Retirement came nine years later in 1878.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassPhoenix / I
Locobase ID7912
RailroadKoniglich SSchsischen Staats-Eisenbahn.
Number in Class1
Road Numbers
Number Built1
Valve GearStephenson
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)26,676 / 12,100
Weight on Drivers (lbs / kg)53,352 / 24,200
Engine Weight (lbs / kg)64,595 / 29,300
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)44 / 22
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)60 / 1525
Boiler Pressure (psi / kPa)75.40 / 5.30
High Pressure Cylinders (dia x stroke) (in / mm)13.98" x 22.05" / 355x560
Tractive Effort (lbs / kg)4603 / 2087.89
Factor of Adhesion (Weight on Drivers/Tractive Effort)11.59
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)10.76 / 1
Evaporative Heating Surface (sq ft / m2)647 / 60.10
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)647 / 60.10
Evaporative Heating Surface/Cylinder Volume165.16
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation811
Same as above plus superheater percentage811
Same as above but substitute firebox area for grate area
Power L1
Power MT

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