Data from P Nicou, "L'Exposition de Milan et Le Simplon" , Bulletin de SociTtT de l'industrie minTrale (France), Tome VI (1907), p 64.
During the construction of the Simplon Tunnel in Switzerland, the builder used both air-driven and steam-driven locomotives. To reduce the smoke buildup from working the steam engines, the last load of coal was loaded onto the grate before it entered the tunnel. At this point, the boiler registered 15 atmospheres. This gave a sufficient reserve over the the 7 atm that would be the minimum useful pressure to work the engine.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | unknown |
Locobase ID | 9908 |
Railroad | Simplon |
Country | Switzerland |
Whyte | 2-4-0T |
Number in Class | |
Road Numbers | |
Gauge | 80 cm |
Number Built | |
Builder | SLM |
Year | 1874 |
Valve Gear | Stephenson |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 4.59 / 1.40 |
Engine Wheelbase (ft / m) | 8.04 / 2.45 |
Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 26,455 / 12,000 |
Engine Weight (lbs / kg) | 34,172 / 15,500 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 911 / 3.45 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 0.40 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 22 / 11 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 24.40 / 620 |
Boiler Pressure (psi / kPa) | 217.60 / 1500 |
High Pressure Cylinders (dia x stroke) (in / mm) | 9.84" x 11.81" / 250x300 |
Tractive Effort (lbs / kg) | 8668 / 3931.74 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.05 |
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) | 5.38 / 0.50 |
Evaporative Heating Surface (sq ft / m2) | 355 / 33 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 355 / 33 |
Evaporative Heating Surface/Cylinder Volume | 341.52 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 1171 |
Same as above plus superheater percentage | 1171 |
Same as above but substitute firebox area for grate area | |
Power L1 | |
Power MT |