SA Ferrovie del Ticino/FNM 0-4-0 Locomotives in Italy

Class Details by Steve Llanso of Sweat House Media

Class 200 (Locobase 6176)

Data from See also Wikipedia's "Locomotiva FNM 200" at [], last accessed 19 August 2019.

The Ticino bought these little engines five years before the FNM (Ferrovie Nord Milano) absorbed the railway. outside constant-lead radial valve gear actuated the valves; a layout unusual in such small locomotives at the time. The cab's windscreen curved up and over the footplate crew to an open backplate. At that point the locomotives were renumbered 201-207. They proved capable of speeds of 60 kph (37 mph) in both directions as they served the Como-Varese-Lavenoline and Saronno-Malnate lines. The FNM renumbered the 200s beginning with 201.

Relegated to switching near the major ports in the 1930s, these locomotives found a second calling pulling auto-trains like the Saronno-Tradate. Wikipedia notes that when the 200-05 was "accurately restored" in 1974, it reentered active service hauling a light train on tourist operations. As of 2019, the 200-05 was the second oldest locomotive still in use in Europe.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID6176
RailroadSA Ferrovie del Ticino/FNM
Number in Class7
Road Numbers200-206/201-207/200-01 to 200-07
Number Built7
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.53 / 2.60
Engine Wheelbase (ft / m) 8.53 / 2.60
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)21.67 / 6.61
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)61,729 / 28,000
Engine Weight (lbs / kg)61,729 / 28,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)61,729 / 28,000
Tender Water Capacity (gals / ML)792 / 3
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)51 / 25.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56.90 / 1446
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)12.6" x 23.62" / 320x600
Tractive Effort (lbs / kg)8123 / 3684.54
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.60
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)49.50 / 4.60
Grate Area (sq ft / m2)13.34 / 1.24
Evaporative Heating Surface (sq ft / m2)773 / 71.80
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)773 / 71.80
Evaporative Heating Surface/Cylinder Volume226.77
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1934
Same as above plus superheater percentage1934
Same as above but substitute firebox area for grate area7178
Power L14117
Power MT294.07

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