Rete Mediterraneo 2-2-2 Locomotives in Italy

Class Details by Steve Llanso of Sweat House Media

Class 524 (Locobase 10732)

Data from E L Ahrons, M I Mech. E, "Early English Express Engines in Italy", The Locomotive Magazine, Vol XV (15 September 1909), p. 174.

When made over by the SFAI, the Sharp, Stewarts that had started out in Sardinia (Locobase 10730) were given Belpaire fireboxes with greater area than the earlier design but fewer boiler tubes. They retained the oddly dimensioned auxiliary wheels.

Two remained in service in 1908 on the FS.

NB: Tube length was derived from subtracting the given direct heating surface area from the total for the tube area and calculating the tube length required for that area when given the tube count and exterior diameter.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10732
RailroadRete Mediterraneo
Number in Class15
Road Numbers524-538
Number Built15
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)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)61,600 / 27,941
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)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)78 / 1981
Boiler Pressure (psi / kPa)100 / 6.90
High Pressure Cylinders (dia x stroke) (in / mm)16" x 20" / 406x508
Tractive Effort (lbs / kg)5579 / 2530.59
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)181 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)9 / 2.74
Firebox Area (sq ft / m2)100 / 9.29
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)952 / 88.44
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)952 / 88.44
Evaporative Heating Surface/Cylinder Volume204.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area10,000
Power L14056
Power MT

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