Strade Ferrate della Sicilia / FS 2-4-0 Locomotives in Italy

Class Details by Steve Llanso of Sweat House Media

Class Gruppo A / Gruppo 120 FS 2 (Locobase 6203)

Data from [], last accessed 5 July 2004. 394 locomotives of very similar design were delivered by Parent Schaken, Pietrasa, Neilson, and Cail. They took 4 forms that differed in several respects, but were essentially alike in their power dimensions and even their size.

The small passenger locomotives in the current entry were supplied to the Rete Sicula (the Sicilian Net), as the SF della Sicilia. They divided into 3 subgroups, but the differences were minor length and height dimensions. Their speed rating was a greyhound-like 70 km/h (43 mph).

The RS was formed from several Sicilian railways in 1885. For the next 20 years, says the RS website, the new management rationalized the network, added 583 route km, and improved maintenance. The Ferrovie dello Stato took over the RS in 1905.

By 1905, 7 were left in service, all at Palermo. Once they were taken into the FS, they were combined with other 2-4-0s of the same design under the Gruppo 120.

See [] (11 July 2004)

Principal Dimensions by Steve Llanso of Sweat House Media

ClassGruppo A / Gruppo 120 FS 2
Locobase ID6203
RailroadStrade Ferrate della Sicilia / FS
Number in Class28
Road NumbersRS 1-RS 28 / Gr 1219-46
Number Built28
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.71 / 1.74
Engine Wheelbase (ft / m)11.84 / 3.61
Ratio of driving wheelbase to overall engine wheelbase 0.48
Overall Wheelbase (engine & tender) (ft / m)33.97
Axle Loading (Maximum Weight per Axle) (lbs / kg)29,101
Weight on Drivers (lbs / kg)57,982 / 26,300
Engine Weight (lbs / kg)77,823 / 35,300
Tender Loaded Weight (lbs / kg)47,399 / 21,500
Total Engine and Tender Weight (lbs / kg)125,222 / 56,800
Tender Water Capacity (gals / ML)1716 / 6.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)48 / 24
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)64.20 / 1630
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)15.98" x 23.62" / 406x600
Tractive Effort (lbs / kg)11,579 / 5252.15
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.01
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)16.68 / 1.55
Evaporative Heating Surface (sq ft / m2)1036 / 96.28
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1036 / 96.28
Evaporative Heating Surface/Cylinder Volume188.95
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2419
Same as above plus superheater percentage2419
Same as above but substitute firebox area for grate area
Power L1
Power MT

All material Copyright ©
Wes Barris