Data from Commander F Biglia, "Tramway Locomotives" (originally in Giornale del Genio civile, an. xvi., p. 144.) in James Forrest (ed), Minutes of Proceedings, Institute of Civil Engineers, Vol 53 (London: ICE, 1878), pp. 348-349.
Commander Biglia reported that the 13.4- mile (21.6 km) tramway in northern Italy had a mean gradient of 1 in 200, and a maximum gradient of 1 in 74 and the sharpest curves measured 84 to 99 feet in radius. (He adds that the rolling stock could handle 52 1/4-ft radii). Through the town and around the curves were laid 60-lb (30 kg/m) rails but the rest were Vignoles rails weighing only 27 lb/yard (13.5 kg/m).
Biglia's report on the motor observed that it had "...been rated as a 30-horse engine, but in common use does not develop more than four-fifths of its power." A typical rake consisted of 3 carriages of 2.7 tons (5,280 lbs) each and holding a total of 120 passengers. When pulled at its maximums speed of 10 3/4 mph (17.3 kph), the motor was calculated to develop 25 HP, "...but frequently only two carriages are attached, reducing the power to that of 20 horses. "Coke consumption was measured at 2.4 kg per train-kilometre (8.5 lb/mile)
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 12519 |
| Railroad | Milano-Saronno Tramway |
| Country | Italy |
| Whyte | 0-4-0T |
| Number in Class | |
| Road Numbers | |
| Gauge | Std |
| Number Built | |
| Builder | |
| Year | 1877 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 4.83 / 1.47 |
| Engine Wheelbase (ft / m) | 4.83 / 1.47 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 4.83 / 1.47 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 15,840 / 7185 |
| Engine Weight (lbs / kg) | 15,840 / 7185 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 317 / 1.20 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 13 / 6.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 20 / 508 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 6.4" x 12" / 163x305 |
| Tractive Effort (lbs / kg) | 3635 / 1648.81 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.36 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | |
| Evaporative Heating Surface (sq ft / m2) | 127 / 11.80 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 127 / 11.80 |
| Evaporative Heating Surface/Cylinder Volume | 284.24 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | |
| Same as above plus superheater percentage | |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |