Data from users.libero.it/allesandro.tuzza/fonti/sfr/1879sfrindice.htm (8 July 2004), an 1878 album of locomotives for the SFR reproduced by Allesandro Tuzza. (later cite: [], Tavola 4). (Thanks to Teemu Koivumak for his 3 January 2021 email supplying the predecessor railway and the locomotive works numbers. ) Works numbers were 599, 600, 639, 640.
See Locobase 6238 for two earlier 2-4-0s and a brief history of the Leopolda. The 1848 engines shown here were unusual looking 4-2-0s in several respects. The carrying axles were separated by 8" 9"(2.67 m) while the safety valve stand over the fire box was a pillar that stood almost as tall as the stack. The illustrations shows lots of rivets, outside cylinders driving the single tall driver, and ornately styled steam dome and stack.
By the time the SF Livornese (into which the Leopolda had been incorporated) was itself absorbed by the Strade Ferrate Romane in 1865, the 53 had been discarded or sold.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | 51 |
Locobase ID | 6234 |
Railroad | Leopolda Railway (SFR) |
Country | Italy |
Whyte | 4-2-0 |
Number in Class | 4 |
Road Numbers | 51- 54 |
Gauge | Std |
Number Built | 4 |
Builder | Robert Stephenson & Co |
Year | 1848 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | |
Engine Wheelbase (ft / m) | 12.65 / 3.85 |
Ratio of driving wheelbase to overall engine wheelbase | |
Overall Wheelbase (engine & tender) (ft / m) | 24.25 / 7.39 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 31,526 / 14,300 |
Weight on Drivers (lbs / kg) | 31,526 / 14,300 |
Engine Weight (lbs / kg) | 56,549 / 25,650 |
Tender Loaded Weight (lbs / kg) | 39,242 / 17,800 |
Total Engine and Tender Weight (lbs / kg) | 95,791 / 43,450 |
Tender Water Capacity (gals / ML) | 1426 / 5.40 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 78 / 1975 |
Boiler Pressure (psi / kPa) | 101.50 / 700 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 24" / 381x610 |
Tractive Effort (lbs / kg) | 5973 / 2709.31 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.28 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 135 - 1.969" / 50 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 13.45 / 4.10 |
Firebox Area (sq ft / m2) | 68.11 / 6.33 |
Grate Area (sq ft / m2) | 10.44 / 0.97 |
Evaporative Heating Surface (sq ft / m2) | 929 / 86.33 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 929 / 86.33 |
Evaporative Heating Surface/Cylinder Volume | 189.25 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1060 |
Same as above plus superheater percentage | 1060 |
Same as above but substitute firebox area for grate area | 6913 |
Power L1 | 3413 |
Power MT | 238.67 |