Data from US Military Railway Service Equipment Data Book for French Locomotives supplied by Allen Stanley in March 2004 from his extensive Rail Data Exchange.
Like many French locomotives, this design's boiler luxuriated in complications. In addtion to the 49 Serve tubes and 28 larger flues, the boiler had 26 additional tubes measuring 55 mm (2.17") in diameter.
Locobase struggled for years to pinpoint this design's identity. After fruitless online searching for any reference to SNCF class 140M, he looked again at the diagrams in the MRS's quite detailed and accurate "Data Book". It appears that 140M was assigned to140 E (Locobase 10004) or 140 F (10005) locomotives.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 140 M |
| Locobase ID | 10007 |
| Railroad | SNCF |
| Country | France |
| Whyte | 2-8-0 |
| Number in Class | |
| Road Numbers | 140 M |
| Gauge | Std |
| Number Built | |
| Builder | |
| Year | |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 20.11 / 6.13 |
| Engine Wheelbase (ft / m) | 28.31 / 8.63 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.71 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 169,123 / 76,713 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 4752 / 18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 57.10 / 1450 |
| Boiler Pressure (psi / kPa) | 227.70 / 1570 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.35" x 25.59" / 390x650 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 23.62" x 25.59" / 600x650 |
| Tractive Effort (lbs / kg) | 28,738 / 13035.35 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 49 - 2.756" / 70 |
| Flues (number - dia) (in / mm) | 28 - 5.236" / 133 |
| Flue/Tube length (ft / m) | 14.11 / 4.30 |
| Firebox Area (sq ft / m2) | 173.09 / 16.08 |
| Grate Area (sq ft / m2) | 33.15 / 3.08 |
| Evaporative Heating Surface (sq ft / m2) | 1662 / 154.45 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1662 / 154.45 |
| Evaporative Heating Surface/Cylinder Volume | 303.23 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 7548 |
| Same as above plus superheater percentage | 7548 |
| Same as above but substitute firebox area for grate area | 39,413 |
| Power L1 | 4220 |
| Power MT | |