Data from cnum_8XAE739, Exposition universelle, Groupe VII. Classes 39 et 40: Industrie des Transports-Chemins de fer et Tramways. Exposition internationale des industries et du travail de Turin 1911 (Paris: Comite Francais des Expositions a l'Etranger, 1911), p. 18. (Thanks to Claus Gaertner for his 17 March 2021 email providing the proper transliteration of the builder's name.)
According to the Exposition report, the railway for which this design was intended needed an engine that could pull 90 tonnes up a 2.5% grade, around curves with radii of 300 metres (984 feet) at 25 km/h (15.5 mph).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Carlo Alberto |
| Locobase ID | 15143 |
| Railroad | Sardinia |
| Country | Italy |
| Whyte | 2-6-0 |
| Number in Class | |
| Road Numbers | |
| Gauge | Std |
| Number Built | |
| Builder | Henschel & Sohn |
| Year | |
| Valve Gear | Walschaert |
| 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) | 24,251 / 11,000 |
| Weight on Drivers (lbs / kg) | 72,752 / 33,000 |
| Engine Weight (lbs / kg) | 89,287 / 40,500 |
| Tender Loaded Weight (lbs / kg) | 47,399 / 21,500 |
| Total Engine and Tender Weight (lbs / kg) | 136,686 / 62,000 |
| Tender Water Capacity (gals / ML) | 2112 / 8 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.40 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 40 / 20 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 51.20 / 1300 |
| Boiler Pressure (psi / kPa) | 171.10 / 1180 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.32" x 24.8" / 440x630 (1) |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 25.59" x 24.8" / 650x630 (1) |
| Tractive Effort (lbs / kg) | 14,493 / 6573.92 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.02 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 182 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.47 / 3.80 |
| Firebox Area (sq ft / m2) | 84.17 / 7.82 |
| Grate Area (sq ft / m2) | 16.68 / 1.55 |
| Evaporative Heating Surface (sq ft / m2) | 1137 / 105.61 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1137 / 105.61 |
| Evaporative Heating Surface/Cylinder Volume | 336.25 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2854 |
| Same as above plus superheater percentage | 2854 |
| Same as above but substitute firebox area for grate area | 14,401 |
| Power L1 | 3081 |
| Power MT | 280.09 |