Data from "Narrow-Gauge Tramway Locomotive", Railroad Gazette, Volume 13 (30 December 1881). pp. 739, 740. ( repeating information from a recent Engineering report).
M O Bihet, engineer and managing director of St Leonard, designed this engine to work within the limits of size, sources, and train loads. The narrow tramways for which this was designed constrained both height and width, ruling grade was 3%, and many curves were as tight as 60 metres. Fuel came in the form of briquettes, which made the most of the local low-calorie coal and feed water came from rain. (i.e, the tramway would get its rain from whatever reservoirs it might be near). Specifications called for the engine to manage 45 ton trailing loads at an average speed of 25 kph (15 1/2 mph). Its tonnage rating on level was 456 tons.
Taking all of this into account, said the RG report, led to "capacious tanks, large heating surfaces and boilers of a relatively larger capacity than usual." Another result was putting everything in the running gear "outside" -- axle bearings, cylinders and valves, springs, compensating beams between the last two powered axles that equalized their motion. The frame widened toward the rear to accommodate the radial trailing axle.
RG noted the extensive use of phosphor bronze in components normally made of iron or steel. These included pistons and piston rods (the two were cast as a single element), expansion links, crossheads, and valve spindles. Although the material cost more, it required less handwork and would be worth more as scrap than either iron or steel.
Principal Dimensions by Steve Llanso of Middle Run Media | |
---|---|
Class | unknown |
Locobase ID | 20553 |
Railroad | Tramways |
Country | Belgium |
Whyte | 0-6-2T |
Number in Class | |
Road Numbers | |
Gauge | 75 cm |
Number Built | |
Builder | SA Saint Leonard |
Year | 1881 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 6.89 / 2.10 |
Engine Wheelbase (ft / m) | 12.47 / 3.80 |
Ratio of driving wheelbase to overall engine wheelbase | 0.55 |
Overall Wheelbase (engine & tender) (ft / m) | 12.47 / 3.80 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 33,620 / 15,250 |
Engine Weight (lbs / kg) | 41,888 / 19,000 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 502 / 1.90 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.90 / 1 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 19 / 9.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 31.50 / 800 |
Boiler Pressure (psi / kPa) | 132 / 910 |
High Pressure Cylinders (dia x stroke) (in / mm) | 11.02" x 14.76" / 280x375 |
Tractive Effort (lbs / kg) | 6385 / 2896.19 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.27 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 80 - 1.614" / 41 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 10.17 / 3.10 |
Firebox Area (sq ft / m2) | 37.67 / 3.50 |
Grate Area (sq ft / m2) | 8.72 / 0.81 |
Evaporative Heating Surface (sq ft / m2) | 407 / 37.80 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 407 / 37.80 |
Evaporative Heating Surface/Cylinder Volume | 249.79 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1151 |
Same as above plus superheater percentage | 1151 |
Same as above but substitute firebox area for grate area | 4972 |
Power L1 | 2532 |
Power MT | 498.11 |