FNM 0-8-0 Locomotives in Italy

Class Details by Steve Llanso of Sweat House Media

Class 240 (Locobase 6175)

Data from digilander.libero.it/sam700/storia200.htm.

This particular entry doesn't have boiler pressure so Locobase's figure is estimated based on several contemporaneous Italian locomotives. The 240s were designed to deliver 900 hp and their superheating undoubtedly aided in offsetting the small size of the boiler. They rated at 60 km/h (38 mph) forward, 40 km/h reverse.

The site says the first 4 were from St Leonard, the next 5 from La Meuse in 1908. When the FNM - the Ferrovie Nord Milano -- took over the Monza-Molteno-Oggiono Railroad in 1912, 2 more of identical design but built by Henschel & Sohn came with the railroad.

In the 1950s, all were sold for scrap.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID6175
Number in Class11
Road Numbers
Number Built11
BuilderSA Saint Leonard
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.76 / 4.50
Engine Wheelbase (ft / m)14.76 / 4.50
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)132,718 / 60,200
Engine Weight (lbs / kg)132,718 / 60,200
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1373 / 5.20
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.70 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52 / 1322
Boiler Pressure (psi / kPa)159.50 / 11
High Pressure Cylinders (dia x stroke) (in / mm)21.65" x 23.62" / 550x600
Tractive Effort (lbs / kg)28,865 / 13092.96
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.60
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)118.36 / 11
Grate Area (sq ft / m2)25.82 / 2.40
Evaporative Heating Surface (sq ft / m2)1237 / 115
Superheating Surface (sq ft / m2)344 / 32
Combined Heating Surface (sq ft / m2)1581 / 147
Evaporative Heating Surface/Cylinder Volume122.91
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4118
Same as above plus superheater percentage5024
Same as above but substitute firebox area for grate area23,032
Power L16764
Power MT449.44

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