Articulated Steam Locomotives in Greece

Piraeus, Athens & Peloponnese


Class Details by Steve Llanso of Sweat House Media

Class M801 (Locobase 1531)

Works numbers 5848-5850 in 1908.

According to [], edited by Nick Sharounis and John Zartaloodes, these were the first superheated locomotives in Greece.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassM801
Locobase ID1531
RailroadPiraeus, Athens & Peloponnese (SPAP)
CountryGreece
Whyte0-4-4-0
Number in Class3
Road NumbersM801-M803
GaugeMetre
Number Built3
BuilderKrauss Maffei
Year1908
Valve Gear
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)87,808 / 39,829
Engine Weight (lbs / kg)87,808 / 39,829
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)37 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43.30 / 1100
Boiler Pressure (psi / kPa)176.30 / 1200
High Pressure Cylinders (dia x stroke) (in / mm)13.39" x 21.26" / 340x540
Low Pressure Cylinders (dia x stroke) (in / mm)19.69" x 21.26" / 500x540
Tractive Effort (lbs / kg)18,041 / 8183.27
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)16.15 / 1.50
Evaporative Heating Surface (sq ft / m2)1152 / 107
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1152 / 107
Evaporative Heating Surface/Cylinder Volume332.47
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2847
Same as above plus superheater percentage2847
Same as above but substitute firebox area for grate area
Power L1
Power MT

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