Strade Ferrate Romane 4-4-0 Locomotives in Italy


Class Details by Steve Llanso of Sweat House Media

Class 495 (Locobase 21044)

Data from "2/4 gek. Schnellzug-lokomotive fur normale Spurweite", Locomotiven, A Borsig (Tegel bei Berlin, 1898), archived on Historical Railway Images, Flickr, at [link], p. 12, last accessed 8 July 2022. Works numbers were 3753-3758 in March 1881.

Described in the catalogue as a "fast express" locomotive, this sextet operated in northern Italy. (Locobase hasn't worked out why the Borsig production compilation identifies the railway as the Oberschlesische, which translates as Upper Schleswig.)


Class 61 (Locobase 6235)

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: [link], Tavola 5)

These were two Norris engines with non-sequential works numbers (351 & 358). they had the classic Norris look of haystack firebox behind a long boiler with the two carrying axles clumped together under the stack. The inclined cylinders drove on the first axle.

Principal Dimensions by Steve Llanso of Middle Run Media
Class49561
Locobase ID21044 6235
RailroadStrade Ferrate RomaneStrade Ferrate Romane (SFR)
CountryItalyItaly
Whyte4-4-04-4-0
Number in Class62
Road Numbers495-50061-62
GaugeStdStd
Number Built62
BuilderBorsigNorris
Year18821846
Valve GearAllanStephenson
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)17,637 / 8000
Weight on Drivers (lbs / kg)35,053 / 15,900
Engine Weight (lbs / kg)87,523 / 39,70048,171 / 21,850
Tender Loaded Weight (lbs / kg)52,911 / 24,00032,298 / 14,650
Total Engine and Tender Weight (lbs / kg)140,434 / 63,70080,469 / 36,500
Tender Water Capacity (gals / ML)2112 / 81241 / 4.70
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.60 / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)29 / 14.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72.80 / 185060.10 / 1527
Boiler Pressure (psi / kPa)145 / 100087 / 600
High Pressure Cylinders (dia x stroke) (in / mm)17.05" x 24.02" / 433x61014" x 22" / 356x558
Tractive Effort (lbs / kg)11,822 / 5362.385306 / 2406.76
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.61
Heating Ability
Tubes (number - dia) (in / mm)126 - 1.772" / 45
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.98 / 3.65
Firebox Area (sq ft / m2)45.95 / 4.27
Grate Area (sq ft / m2)21.64 / 2.01 9.47 / 0.88
Evaporative Heating Surface (sq ft / m2)980 / 91.06761 / 70.73
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)980 / 91.06761 / 70.73
Evaporative Heating Surface/Cylinder Volume154.39194.15
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3138824
Same as above plus superheater percentage3138824
Same as above but substitute firebox area for grate area3998
Power L12203
Power MT277.11

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