Data from "Compound Tank Freight Engines", Railway Engineer, June 1908, p 187.
The Grande Ceinture was the Belt Railway of Paris, a circumferential line that took a lot of transfer traffic from one railway to another. In such duty, hard-slogging engines such as this tank design proved quite useful. Run at the high PSI of the time and fitted with a Belpaire firebox, the locomotive had its LP cylinders under the smokebox and its smaller HP cylinders just ahead of the drivers outside. A piston valve on each of the four cylinders were actuated by its own Walschaert valve gear. The boiler tubes were of the now-familiar Serve design with its internal fins.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 8912 |
| Railroad | Grand Ceinture |
| Country | France |
| Whyte | 4-8-0T |
| Number in Class | |
| Road Numbers | |
| Gauge | Std |
| Number Built | |
| Builder | |
| Year | 1908 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15.58 / 4.75 |
| Engine Wheelbase (ft / m) | 27.72 / 8.45 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | 27.72 / 8.45 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 34,833 / 15,800 |
| Weight on Drivers (lbs / kg) | 134,702 / 61,100 |
| Engine Weight (lbs / kg) | 179,015 / 81,200 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 179,015 / 81,200 |
| Tender Water Capacity (gals / ML) | |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 56 / 28 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56.70 / 1440 |
| Boiler Pressure (psi / kPa) | 227.70 / 1570 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.57" x 25.59" / 370x650 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 22.44" x 25.59" / 570x650 |
| Tractive Effort (lbs / kg) | 26,088 / 11833.33 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.16 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 126 - 2.756" / 70 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.45 / 4.10 |
| Firebox Area (sq ft / m2) | 122.99 / 11.43 |
| Grate Area (sq ft / m2) | 24.43 / 2.27 |
| Evaporative Heating Surface (sq ft / m2) | 2177 / 202.32 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2177 / 202.32 |
| Evaporative Heating Surface/Cylinder Volume | 440.85 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5563 |
| Same as above plus superheater percentage | 5563 |
| Same as above but substitute firebox area for grate area | 28,005 |
| Power L1 | 5129 |
| Power MT | 335.78 |