Data from SACM diagram UG Type. 187 from 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 7676-7677.
Tube diameter is the interior measurement. External tube diameter was 55 mm (2.17"), external flue diameter was 145 mm (5.71").
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | S16 |
| Locobase ID | 15510 |
| Railroad | Alsace-Lorraine |
| Country | France |
| Whyte | 4-6-2 |
| Number in Class | 2 |
| Road Numbers | 231D 1-231D 2 |
| Gauge | Std |
| Number Built | 2 |
| Builder | SACM |
| Year | 1933 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.62 / 4.15 |
| Engine Wheelbase (ft / m) | 36.73 / 11.20 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.37 |
| Overall Wheelbase (engine & tender) (ft / m) | 75.98 / 23.16 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 132,277 / 60,000 |
| Engine Weight (lbs / kg) | 236,776 / 107,400 |
| Tender Loaded Weight (lbs / kg) | 148,261 / 67,250 |
| Total Engine and Tender Weight (lbs / kg) | 385,037 / 174,650 |
| Tender Water Capacity (gals / ML) | 7432 / 28.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 10.60 / 10 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 73 / 36.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 76.80 / 1950 |
| Boiler Pressure (psi / kPa) | 290.10 / 2000 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 22.64" x 28.35" / 575x720 |
| Tractive Effort (lbs / kg) | 46,656 / 21162.83 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 2.84 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 137 - 1.969" / 50 |
| Flues (number - dia) (in / mm) | 30 - 5.512" / 140 |
| Flue/Tube length (ft / m) | 19.39 / 5.91 |
| Firebox Area (sq ft / m2) | 201.29 / 18.70 |
| Grate Area (sq ft / m2) | 48.44 / 4.50 |
| Evaporative Heating Surface (sq ft / m2) | 2408 / 223.70 |
| Superheating Surface (sq ft / m2) | 794 / 73.80 |
| Combined Heating Surface (sq ft / m2) | 3202 / 297.50 |
| Evaporative Heating Surface/Cylinder Volume | 182.29 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 14,052 |
| Same as above plus superheater percentage | 17,566 |
| Same as above but substitute firebox area for grate area | 72,993 |
| Power L1 | 29,686 |
| Power MT | 1484.30 |