Alta Italia 0-4-0 Locomotives in Italy


Class Details by Steve Llanso of Sweat House Media

Class 1047 (Locobase 20670)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T55. Works number was 719 in 1870.

Robust little four-coupled switcher whose profile was dominated by a big spark-arresting stack, a tall dome with safety valve stand just behind and a smaller sandbox. It also had a full cab.

Renumbered once by the SFAI to 1400, the engine was taken into the Rete Mediterraneo in 1885 as their 5101. With the Ferro dello Stato amalgamating almost all railways in 1905, the 5101 was renumbered 8001.


Class 1048 (Locobase 20671)

Data from Ferrovie Dell' Alta Italia, Album Delle Locomotive (Torino, 1o Luglio 1876), T55. Works numbers were 785-786 in 1872.

If the 1047 shown in Locobase 20670 was relatively large for a four-coupled tank shunter (switcher), this little dinky was about as small as a standard-gauge locomotive could. The vertical boiler was almost completely hidden by side tanks and the footplate roof was by far the largest single item in the engine's profile.

Renumbered once by the SFAI to 1401-1402, the engines were renumbered by the Rete Mediterraneo in 1885 as their 5001-5002. At the inception of the Ferro dello Stato in 1905, the FS signified their lilliputian qualities by assigning them 0051-0052.

Principal Dimensions by Steve Llanso of Sweat House Media

Class10471048
Locobase ID20670 20671
RailroadAlta Italia (SFAI)Alta Italia (SFAI)
CountryItalyItaly
Whyte0-4-0T0-4-0T
Number in Class12
Road Numbers1047/1400/5101/80011048-1049/1401-1402/5001-5002/0051-0052
GaugeStdStd
Number Built12
BuilderCockerillCockerill
Year18701872
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.56 / 2 4.92 / 1.50
Engine Wheelbase (ft / m) 6.56 / 2 4.92 / 1.50
Ratio of driving wheelbase to overall engine wheelbase11
Overall Wheelbase (engine & tender) (ft / m) 6.56 / 2 4.92 / 1.50
Axle Loading (Maximum Weight per Axle) (lbs / kg)27,007 / 12,2508598 / 3900
Weight on Drivers (lbs / kg)52,911 / 24,00016,755 / 7600
Engine Weight (lbs / kg)52,911 / 24,00016,755 / 7600
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1056 / 4190 / 0.72
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)16.50 / 15 0.30
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 2214 / 7
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)41.70 / 106022.80 / 580
Boiler Pressure (psi / kPa)87 / 687 / 6
High Pressure Cylinders (dia x stroke) (in / mm)13.86" x 20.47" / 352x5208.07" x 10.04" / 205x255
Tractive Effort (lbs / kg)6973 / 3162.902121 / 962.07
Factor of Adhesion (Weight on Drivers/Tractive Effort) 7.59 7.90
Heating Ability
Tubes (number - dia) (in / mm)151 - 1.969" / 5035 - 2.559" / 65
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.20 / 2.50 2.76 / 0.84
Firebox Area (sq ft / m2)69.43 / 6.45
Grate Area (sq ft / m2)10.33 / 0.96 6.78 / 0.63
Evaporative Heating Surface (sq ft / m2)689 / 6465 / 6.04
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)689 / 6465 / 6.04
Evaporative Heating Surface/Cylinder Volume192.75109.36
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation899590
Same as above plus superheater percentage899590
Same as above but substitute firebox area for grate area6040
Power L11753
Power MT146.08

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