Leopolda Railway / Strade Ferrate Romane 2-2-2 Locomotives in Italy


Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 6231)

Data from users.libero.it/allesandro.tuzza/fonti/sfr/1879sfrindice.htm (8 July 2004), an 1878 album of locomotives for the SFR reproduced by Allesandro Tuzza. (Reference: 18785751 STRADE FERRATE ROMANE Album delle locomotive Firenze : Benelli, 1878, found in bibliography at [], Tavola 1, last accessed 28 July 2007)

An upright single-wheeler with inclined cylinders within the plate frame. For Canada Works they were locomotives 143-149, and 154-160. Compared to the British 2-2-2s, these were quite a bit smaller.


Class 25 (Locobase 6232)

Data from users.libero.it/allesandro.tuzza/fonti/sfr/1879sfrindice.htm (8 July 2004), an 1878 album of locomotives for the SFR reproduced by Allesandro Tuzza. (later cite: [], Tavola 2)

This 2-2-2 was small in almost every respect, even when first delivered by Sharp, Stewart (works #1040).

The Album data contain an inconsistency that Locobase can't resolve with available information. The stated evaporative heating surface area--55.30 sq m--is approximately 20% too low when compared to the sum of firebox heating surface area and the calculated tube heating surface area. Locobase's specifications adjust the EHS to reflect the higher value.


Class 41 (Locobase 6233)

Data from users.libero.it/allesandro.tuzza/fonti/sfr/1879sfrindice.htm (8 July 2004), an 1878 album of locomotives for the SFR reproduced by Allesandro Tuzza (later cite: [], Tavola 3). See also Alexandre Louis Deghilage, Origine de la Locomotive (Paris: Imprierie A Broise et Courtier, 1886), p. 38. (Thanks to Teemu Koivumaki for his 4 January 2021 email supplying the link to Luigi M Impallomeni, "Locomotive impiegate nelle strade ferrate granducali 1844-1860", archived at []. last accessed 1/12/2021). Its summary of Grand Ducal locomotives has been very helpful. Works number was 400 in 1844.

See Locobase 3238 for a brief history of the Leopolda.

This was a Stephenson longboiler by all appearances with the three axles grouped in the middle, the inside cylinders and stack ahead, and the haystack boiler behind. Deghilage describes the design (with these same dimensions) as operating on "divers chemins de fer".

The engine survived to be taken into the Strade Ferrate Romane in 1865 as their #41.

Principal Dimensions by Steve Llanso of Sweat House Media

Class12541
Locobase ID6231 6232 6233
RailroadStrade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)Leopolda Railway (SFR)
CountryItalyItalyItaly
Whyte2-2-22-2-22-2-2
Number in Class1411
Road Numbers1-142541
GaugeStdStdStd
Number Built1411
BuilderCanada WorksSharp, StewartRobert Stephenson & Co
Year186318581844
Valve GearGoochStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)13.50 / 4.1211.44 / 3.4910.25 / 3.12
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)23 / 7.0121.78 / 6.6423.85 / 7.27
Axle Loading (Maximum Weight per Axle) (lbs / kg)20,834 / 945016,535 / 750018,078 / 8200
Weight on Drivers (lbs / kg)18,739 / 850016,535 / 750015,983 / 7250
Engine Weight (lbs / kg)52,470 / 23,80044,644 / 20,25048,502 / 22,000
Tender Loaded Weight (lbs / kg)34,833 / 15,80037,038 / 16,80034,613 / 15,700
Total Engine and Tender Weight (lbs / kg)87,303 / 39,60081,682 / 37,05083,115 / 37,700
Tender Water Capacity (gals / ML)1267 / 4.801056 / 41162 / 4.40
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) / 1 1.10 / 11 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)31 / 15.5028 / 1427 / 13.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)71.20 / 180866.10 / 168066 / 1675
Boiler Pressure (psi / kPa)101.50 / 787 / 658 / 4
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x50814.49" x 20" / 368x50814" x 22" / 356x558
Tractive Effort (lbs / kg)5453 / 2473.444698 / 2130.983221 / 1461.02
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.44 3.52 4.96
Heating Ability
Tubes (number - dia) (in / mm)164 - 1.75" / 41147 - 1.732" / 44148 - 1.575" / 40
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.30 / 3.1410.37 / 3.1612.63 / 3.85
Firebox Area (sq ft / m2)72.52 / 6.7459.96 / 5.5757.89 / 5.38
Grate Area (sq ft / m2)12.48 / 1.1610.76 / 1 8.93 / 0.83
Evaporative Heating Surface (sq ft / m2)787 / 73.18750 / 69.70771 / 71.61
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)787 / 73.18750 / 69.70771 / 71.61
Evaporative Heating Surface/Cylinder Volume192.39196.48196.70
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1267936518
Same as above plus superheater percentage1267936518
Same as above but substitute firebox area for grate area736152173358
Power L1338526361726
Power MT398.24351.46238.08

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