Data from diagram No 61, Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as
Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007). Works numbers were 2481-2483 in 1881
All three of these six-wheelers were relettered and renumbered three times as follows:
SOS 1890 27-29
Jura-Simplon 1903 80-82
SBB 1080-1082
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 7 |
| Locobase ID | 15611 |
| Railroad | Jura-Simplon |
| Country | Switzerland |
| Whyte | 2-4-0 |
| Number in Class | 3 |
| Road Numbers | 7-9 |
| Gauge | Std |
| Number Built | 3 |
| Builder | SACM |
| Year | 1875 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.20 / 2.50 |
| Engine Wheelbase (ft / m) | 14.44 / 4.40 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
| Overall Wheelbase (engine & tender) (ft / m) | 41.93 / 12.78 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 81,902 / 37,150 |
| Tender Loaded Weight (lbs / kg) | 59,525 / 27,000 |
| Total Engine and Tender Weight (lbs / kg) | 141,427 / 64,150 |
| Tender Water Capacity (gals / ML) | 2772 / 10.50 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.40 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 68.10 / 1730 |
| Boiler Pressure (psi / kPa) | 142.10 / 980 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.54" x 22.05" / 420x560 |
| Tractive Effort (lbs / kg) | 10,699 / 4852.99 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 162 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.20 / 3.72 |
| Firebox Area (sq ft / m2) | 67.06 / 6.23 |
| Grate Area (sq ft / m2) | 19.27 / 1.79 |
| Evaporative Heating Surface (sq ft / m2) | 1017 / 94.52 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1017 / 94.52 |
| Evaporative Heating Surface/Cylinder Volume | 185.47 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2738 |
| Same as above plus superheater percentage | 2738 |
| Same as above but substitute firebox area for grate area | 9529 |
| Power L1 | 3977 |
| Power MT | |