Data from Dr. R. Sanzin, "Die Lokomotiven auf der Intertionalen Austellung in Mailand 1906, 51. 3/5 gekuppelte Tenderlokomotive der konigl. Italienischen Feldbahnen ...", Zeitschrift des Oesterreichischen Ingenieur- und Architeckten-Vereines, Volume LIX [59], Nr. 14 (5 April 1907), p 252.
Although the wheel arrangement might be described as a Prairie tank, this locomotive resembled no other such locomotives. Its boiler and firebox rested on a platform; the configuration of the vessel we'll get to in a moment. First comes the running gear, which had the adhesive axles inside the thick frame, the axle ends being extended to take the outside cranks for the valve gear and rods. The rear axle apparently did not swing, but traversed within a tight opening.
Above the platform and behind the firebox stood the crew, completely exposed to the elements. A second, shorter, smaller-diameter cylinder rested on the boiler. The regulator was perched on the top of this receiver and a long pipe extended down to a point near the cylinder.
Given that this was a light railway locomotive for the Army, Locobase suspects that it operated on very light track.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 15558 |
| Railroad | Italian Army |
| Country | Italy |
| Whyte | 2-6-2T |
| Number in Class | |
| Road Numbers | |
| Gauge | 75 cm |
| Number Built | |
| Builder | GA Armstrong |
| Year | 1906 |
| Valve Gear | Heusinger |
| 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) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 39,242 / 17,800 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 39,242 / 17,800 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 25.60 / 650 |
| Boiler Pressure (psi / kPa) | 217.60 / 1500 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12.99" x 15.75" / 330x400 |
| Tractive Effort (lbs / kg) | 19,202 / 8709.89 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 118 - 1.85" / 47 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 8.61 / 0.80 |
| Evaporative Heating Surface (sq ft / m2) | 501 / 46.50 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 501 / 46.50 |
| Evaporative Heating Surface/Cylinder Volume | 207.38 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1874 |
| Same as above plus superheater percentage | 1874 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |