Stato Piemontese 0-6-0 Locomotives in Italy


Class Details by Steve Llanso of Sweat House Media

Class 14/460/701 (Locobase 20647)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T44. (For roster details, see Josef Pospichal's Lokstatistik at [], last accessed 15 August 2019.) Works numbers were 751-752 in 1849.

This pair were among the earliest six-coupled locomotives in Italy. Under the long boiler, the front driving axle was spaced 1.9 metres (6 ft 3 in) ahead of the middle axle, 300 mm (11.84 in) further apart than the 1.6 m between the second and third. A classic haystack firebox and dome, which left the tall safety-valve stand alone in the middle of the boiler.

After two decades or so of service, both had been scrapped by the SF Alta Italia by 1873.

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 161/420/758 (Locobase 20664)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T49. (For roster details, see Josef Pospichal's Lokstatistik at [], last accessed 15 August 2019.) Works numbers were 1418-1426 in 1862.

Stephensons delivered typical long-boilers to the Piedmont. Under the long boiler, the front driving axle was spaced 2.08 metres (6 ft 10 in) ahead of the middle axle, 762 mm (36 in) further apart than the 1.32 metres (4 ft 4 in) between the second and third. For their time, these six-coupleds had relatively large grates

Although the class was taken into the Stato Ferrovie dell'Alta Italia (SFAI) in 1865, but were scrapped before the Redes were set up in 1885.

Locobase found an inconsistencies between the given values for the tube diameters, tube lengths, and for the evaporative heating surface area given as 96.0 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.

Principal Dimensions by Steve Llanso of Sweat House Media

Class14/460/701161/420/758
Locobase ID20647 20664
RailroadStato PiemonteseStato Piemontese
CountryItalyItaly
Whyte0-6-00-6-0
Number in Class29
Road Numbers14-15/460-461/701-702161-169/420-428/758-766
GaugeStdStd
Number Built29
BuilderRobert Stephenson & CoRobert Stephenson & Co
Year18491862
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.48 / 3.5011.17 / 3.40
Engine Wheelbase (ft / m)11.48 / 3.5011.17 / 3.40
Ratio of driving wheelbase to overall engine wheelbase11
Overall Wheelbase (engine & tender) (ft / m)32.31 / 9.8535.19 / 10.73
Axle Loading (Maximum Weight per Axle) (lbs / kg)19,842 / 900026,455 / 12,000
Weight on Drivers (lbs / kg)55,049 / 24,97071,871 / 32,600
Engine Weight (lbs / kg)55,049 / 24,97071,871 / 32,600
Tender Loaded Weight (lbs / kg)34,833 / 15,80047,179 / 21,400
Total Engine and Tender Weight (lbs / kg)89,882 / 40,770119,050 / 54,000
Tender Water Capacity (gals / ML)1320 / 51848 / 7
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.20 / 2 3.30 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)31 / 15.5040 / 20
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54.50 / 138548.40 / 1230
Boiler Pressure (psi / kPa)87 / 6101.50 / 7
High Pressure Cylinders (dia x stroke) (in / mm)15" x 24.02" / 381x61017.87" x 22.01" / 454x559
Tractive Effort (lbs / kg)7333 / 3326.2012,529 / 5683.07
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.51 5.74
Heating Ability
Tubes (number - dia) (in / mm)134 - 2.126" / 54170 - 1.969" / 50
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.16 / 4.0112.83 / 3.91
Firebox Area (sq ft / m2)65.66 / 6.1078.58 / 7.30
Grate Area (sq ft / m2) 9.90 / 0.9215.72 / 1.46
Evaporative Heating Surface (sq ft / m2)1047 / 97.271203 / 111.76
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1047 / 97.271203 / 111.76
Evaporative Heating Surface/Cylinder Volume213.12188.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation8611596
Same as above plus superheater percentage8611596
Same as above but substitute firebox area for grate area57127976
Power L122122045
Power MT265.76188.19

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