Data from A[natole] Mallet, "Compound Locomotives for the Metre-Gauge," reprinted in Minutes of Proceedings of Institution of Civil Engineers, Vol LIX, pp. 349-350. See also Mallet's Etude sur L'Utilisation de la Vapeur dans les Locomotives et L'Application a ces Machines du Fonctionnement Compound (Paris: Librairie Polytechnique Ch. Beranger, Ed, 1878), especially pp. 126-131.
Locobase 7377 shows Mallet's first experiment with a compound tank on the Bayonne & Biarritz. It was followed by this engine, which had two link motions that operated independently of each other using the hand-lever, but in synch when using the reversing screw.
On a railroad that featured curves with radii as tight as 115 ft, "A.B" reported that when working direct (i.e. full boiler steam in both cylinders), the locomotive could move a 60-ton train up a 1 in 33 (3%) grade.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 11175 |
| Railroad | Haironville a Triaucourt |
| Country | France |
| Whyte | 0-6-0T |
| Number in Class | 5 |
| Road Numbers | |
| Gauge | Metre |
| Number Built | 5 |
| Builder | Mallet |
| Year | 1879 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.51 / 1.68 |
| Engine Wheelbase (ft / m) | 5.51 / 1.68 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 5.51 / 1.68 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 34,172 / 15,500 |
| 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) | 502 / 1.90 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 19 / 9.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 29.50 / 750 |
| Boiler Pressure (psi / kPa) | 140.70 / 970 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 8.66" x 15.75" / 220x400 (1) |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 13.58" x 15.75" / 345x400 (1) |
| Tractive Effort (lbs / kg) | 3404 / 1544.03 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 10.04 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 99 - 1.772" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.22 / 2.20 |
| Firebox Area (sq ft / m2) | 34.43 / 3.20 |
| Grate Area (sq ft / m2) | 6.99 / 0.65 |
| Evaporative Heating Surface (sq ft / m2) | 351 / 32.60 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 351 / 32.60 |
| Evaporative Heating Surface/Cylinder Volume | 653.80 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 983 |
| Same as above plus superheater percentage | 983 |
| Same as above but substitute firebox area for grate area | 4844 |
| Power L1 | 2741 |
| Power MT | 530.51 |