CF de Fer de Hermes a Beaumont 0-6-2 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 9174)

Data from M D Banderali, "Conditions d'Etablissement du Materiel Roulant de la Ligne de Hermes a Beaumont (Voie de 1m00)", Revue gTnTrale des chemins de fer, Volume 4, 2me Semestre, pp. 167-177 and A. Sampite, Les Chemins de Fer a Faible Trafic en France (Paris: Baudry et Cie, 1888), p. 49. See also [] for a history of these Freycinet Plan railways

This railway, located in the Oise et Seine-et-Oise Departments, was the very first metre-gauge railway to be built in France. (Sampite notes that there were narrow-gauge industrial lines, but this was the first common carrier.). It connected stations on the Nord with ribbons of 20-kg/metre (40-lb/yard) iron rail that proved insufficiently resistant to lateral movements and was replaced by steel rail of the same weight. Turntables measuring 4.8 meters (15.75 feet) in diameter were located at each end of the line.

The principal difference between the meter-gauge engines shown here and the smaller types of six-coupled tanks used on standard-gauge lignes d'interet locaux was the size of the drivers. One can suppose that such a light, narrow line would be limited in top speed anyway, so maximizing tractive effort by adopting a small driver made sense.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID9174
RailroadCF de Fer de Hermes a Beaumont
Number in Class4
Road Numbers
Number Built4
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.79 / 2.07
Engine Wheelbase (ft / m)13.02 / 3.97
Ratio of driving wheelbase to overall engine wheelbase 0.52
Overall Wheelbase (engine & tender) (ft / m)13.02 / 3.97
Axle Loading (Maximum Weight per Axle) (lbs / kg)14,991 / 6800
Weight on Drivers (lbs / kg)44,092 / 20,000
Engine Weight (lbs / kg)52,249 / 23,700
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)52,249 / 23,700
Tender Water Capacity (gals / ML)792 / 3
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.10 / 1
Minimum weight of rail (calculated) (lb/yd / kg/m)24 / 12
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)35.40 / 900
Boiler Pressure (psi / kPa)120.40 / 8.30
High Pressure Cylinders (dia x stroke) (in / mm)13.78" x 18.11" / 350x460
Tractive Effort (lbs / kg)9942 / 4509.62
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.43
Heating Ability
Tubes (number - dia) (in / mm)123 - 1.614" / 41
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.40 / 3.17
Firebox Area (sq ft / m2)43.06 / 4
Grate Area (sq ft / m2)10.76 / 1
Evaporative Heating Surface (sq ft / m2)584 / 54.22
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)584 / 54.22
Evaporative Heating Surface/Cylinder Volume186.82
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1296
Same as above plus superheater percentage1296
Same as above but substitute firebox area for grate area5184
Power L11816
Power MT272.40

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