Strade Ferrate Romane 0-6-0 Locomotives in Italy


Class Details by Steve Llanso of Sweat House Media

Class 501 (Locobase 6270)

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 38.) Works numbers were 716, 718.

Small six-coupled of relatively early vintage from Robert Stephenson. The steam dome was positioned just ahead of the middle axle and had a hemispherical cover. The distance between the first and second axles was about a foot greater than the distance between the second and third.

Locobase found an inconsistencies between the given values for the tube diameters, tube lengths, and for the evaporative heating surface area given as 82.2 sq m. The EHS value shown in Locobase's specs is composed of the firebox heating surface area given in the diagram and the tube heating surface area calculated from the stated tube length, external tube diameter, and count.


Class 531 (Locobase 6255)

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 39.)

JF Cail 's locomotives supplied to the SFR in 1858 all used the same boiler and grate but had different roles. This trio (works 614-615 & 617) were the freight haulers and had more cylinder volume and smaller drivers and thus more power. See Locobase 6254 for the 2-4-0 mixed-passenger engines and 6260 for the 70" drivered locomotives.


Class 541 (Locobase 6271)

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 40.)

Following the first pair of Koechlin locomotives by a couple of years, these (works #971-972) too had the small dome. Although they resembled the standard six-coupled that was built over a dozen years, these two locomotives had a smaller boiler.

See Locobase 6258 for a brief history of the SFR from its founding in 1860 as a merger of two Rome-based railways and later acquisitions.

Consolidations continued in 1865 with the union of the 337-mile SFR, the 618 km (384 miles) of the Societa delle Ferrovie Livornesi, and 169 km (105 miles) of the Societa per la Ferrovia Centrale Toscana. The two northernmost roads -- FlorencevPistoiavPisa line and the PisavLa SpeziavMassa -- were transferred to the Societa per le strade ferrate dell'Alta Italia in 1869.


Class 551 (Locobase 6273)

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 42.) Works numbers 1453-56 and 1458-1461.

Inside-cylinder six-coupleds with the characteristic gap between the first and second axles.


Class 559 (Locobase 6274)

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 43.)

Works #59-62. Apparently a standard 6-coupled design because it is so close to the earlier Sharp, Stewart batch shown on Locobase 6273. Inside-cylinder six-coupleds with the characteristic gap between the first and second axles. One visible difference was a more utilitarian stack shape.


Class 567 (Locobase 6275)

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 22.)

NIMN works #59-62 followed Hartmann's design (itself based on the earlier Sharp, Stewart batch; Locobase 6274, 6273, respectively) with very few changes.


Class 571-578 (Locobase 6276)

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 45.)

Part of the stud of standard six-coupleds from this era on the SFR. See Locobase 6273-6275. There were tweaks, however, including a larger grate.


Class 601 (Locobase 6277)

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 46.)

This pair of six-coupleds (Koechlin works #621-622) had splashers that hugged the upper arc of the drivers. A very small dome over the lead axle extended its steam pipes outside the jacket to the cylinder. As a result, the boiler looked much larger than others of similar power.

Three years later, Koechlin shipped 15 more (works #855-859, 867-876) with identical dimensions. One year later -- 1865 -- Grafenstaden delivered works #336-340, which followed the pattern exactly. In 1873, NIMN added 10 of its own (works #63-74) and, finally, in 1875, Alsacienne delivered its works 2484-2489 to the same design.


Class 635 (Locobase 6278)

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 50.)

NMIN finished off the SFR's catalogue of six-coupleds with a design that was based on the standard 0-6-0. For some reason, this boiler had one more fire tube, which slightly enlarged the heating surface.

Principal Dimensions by Steve Llanso of Sweat House Media

Class501531541551559
Locobase ID6270 6255 6271 6273 6274
RailroadStrade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)
CountryItalyItalyItalyItalyItaly
Whyte0-6-00-6-00-6-00-6-00-6-0
Number in Class23288
Road Numbers501-502531-533541-542551-554, 555-558559-566
GaugeStdStdStdStdStd
Number Built23288
BuilderRobert Stephenson & CoCailKoechlinSharp, StewartHartmann
Year18491858186518631871
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.94 / 3.3311.81 / 3.6011.68 / 3.5611.5011.50
Engine Wheelbase (ft / m)10.94 / 3.3311.81 / 3.6011.68 / 3.5611.5011.50
Ratio of driving wheelbase to overall engine wheelbase11111
Overall Wheelbase (engine & tender) (ft / m)27.85 / 8.49
Axle Loading (Maximum Weight per Axle) (lbs / kg)21,495 / 975022,928 / 10,40024,912 / 11,30020,944 / 950023,149 / 10,500
Weight on Drivers (lbs / kg)63,052 / 28,60064,154 / 29,10073,193 / 33,20060,407 / 27,40066,469 / 30,150
Engine Weight (lbs / kg)63,052 / 28,60064,154 / 29,10073,193 / 33,20060,407 / 27,40066,469 / 30,150
Tender Loaded Weight (lbs / kg)38,581 / 17,50040,785 / 18,50048,171 / 21,85048,061 / 21,80049,935 / 22,650
Total Engine and Tender Weight (lbs / kg)101,633 / 46,100104,939 / 47,600121,364 / 55,050108,468 / 49,200116,404 / 52,800
Tender Water Capacity (gals / ML)1320 / 51769 / 6.701795 / 6.801756 / 6.651729 / 6.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.5036 / 1841 / 20.5034 / 1737 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56.30 / 143153.90 / 137057.50 / 146053.10 / 135053.10 / 1350
Boiler Pressure (psi / kPa)116 / 8101.50 / 7116 / 8116 / 8116 / 8
High Pressure Cylinders (dia x stroke) (in / mm)15" x 24.02" / 381x61017.32" x 23.62" / 440x60016.54" x 23.62" / 420x60017" x 23" / 432x58417" x 23" / 432x584
Tractive Effort (lbs / kg)9465 / 4293.2611,342 / 5144.6511,081 / 5026.2612,343 / 5598.7012,343 / 5598.70
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.66 5.66 6.61 4.89 5.39
Heating Ability
Tubes (number - dia) (in / mm)134 - 1.969" / 50164 - 1.929" / 49174 - 1.929" / 49154 - 1.929" / 49151 - 1.929" / 49
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.80 / 3.9013.52 / 4.1213.94 / 4.2513.52 / 4.1213.48 / 4.11
Firebox Area (sq ft / m2)71.90 / 6.6877.36 / 7.1980.70 / 7.5076.29 / 7.0975.86 / 7.05
Grate Area (sq ft / m2)10.66 / 0.9912.37 / 1.1513.45 / 1.2512.05 / 1.1212.05 / 1.12
Evaporative Heating Surface (sq ft / m2)956 / 88.801124 / 104.451206 / 112.041040 / 96.681019 / 94.68
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)956 / 88.801124 / 104.451206 / 112.041040 / 96.681019 / 94.68
Evaporative Heating Surface/Cylinder Volume194.59174.51205.31172.12168.64
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation12371256156013981398
Same as above plus superheater percentage12371256156013981398
Same as above but substitute firebox area for grate area83407852936188508800
Power L129152139304624152376
Power MT305.77220.52275.24264.41236.42

Principal Dimensions by Steve Llanso of Sweat House Media

Class567571-578601635
Locobase ID6275 6276 6277 6278
RailroadStrade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)Strade Ferrate Romane (SFR)
CountryItalyItalyItalyItaly
Whyte0-6-00-6-00-6-00-6-0
Number in Class48404
Road Numbers567-570571-578601-634, 641-646635-638
GaugeStdStdStdStd
Number Built48404
BuilderNIMNSiglseveralNIMN
Year1872187518611875
Valve GearStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.50 / 3.5011.50 / 3.5011.38 / 3.4711.38 / 3.47
Engine Wheelbase (ft / m)11.50 / 3.5011.50 / 3.5011.38 / 3.4711.38 / 3.47
Ratio of driving wheelbase to overall engine wheelbase1111
Overall Wheelbase (engine & tender) (ft / m)35.60 / 10.8532.46 / 9.89
Axle Loading (Maximum Weight per Axle) (lbs / kg)22,046 / 10,00023,810 / 10,80025,794 / 11,70026,345 / 11,950
Weight on Drivers (lbs / kg)63,714 / 28,90069,335 / 31,45072,091 / 32,70076,170 / 34,550
Engine Weight (lbs / kg)63,714 / 28,90069,335 / 31,45072,091 / 32,70076,170 / 34,550
Tender Loaded Weight (lbs / kg)51,809 / 23,50048,281 / 21,90046,958 / 21,30047,399 / 21,500
Total Engine and Tender Weight (lbs / kg)115,523 / 52,400117,616 / 53,350119,049 / 54,000123,569 / 56,050
Tender Water Capacity (gals / ML)1901 / 7.201716 / 6.501822 / 6.901848 / 7
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.5039 / 19.5040 / 2042 / 21
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53.10 / 135053.10 / 135050.40 / 128050.40 / 1280
Boiler Pressure (psi / kPa)116 / 8116 / 8116 / 8116 / 8
High Pressure Cylinders (dia x stroke) (in / mm)17" x 23" / 432x58417" x 23" / 432x58417.72" x 25.59" / 450x65017.72" x 25.59" / 450x650
Tractive Effort (lbs / kg)12,343 / 5598.7012,343 / 5598.7015,720 / 7130.4815,720 / 7130.48
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.16 5.62 4.59 4.85
Heating Ability
Tubes (number - dia) (in / mm)152 - 1.929" / 49150 - 1.929" / 49197 - 1.929" / 49198 - 1.929" / 49
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.45 / 4.1013.48 / 4.1113.94 / 4.2513.94 / 4.25
Firebox Area (sq ft / m2)75.32 / 775.54 / 7.0285.43 / 7.9485.43 / 7.94
Grate Area (sq ft / m2)12.48 / 1.1613.02 / 1.2114.63 / 1.3614.63 / 1.36
Evaporative Heating Surface (sq ft / m2)1023 / 95.101012 / 94.071359 / 126.301365 / 126.90
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1023 / 95.101012 / 94.071359 / 126.301365 / 126.90
Evaporative Heating Surface/Cylinder Volume169.31167.49186.06186.88
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1448151016971697
Same as above plus superheater percentage1448151016971697
Same as above but substitute firebox area for grate area8737876399109910
Power L12378236123832391
Power MT246.85225.22218.62207.61

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