BTziers via Montbazin-Gigean 0-3-3-0 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class 151 (Locobase 9164)

Data from 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 and Wikipedia [] (accessed 2 February 2008).

The Reseau d'Interet Local CF de l'HTrault was a network of secondary lines along the Gulf of Lyon in Southeast France. Sampite provides a summary of all the locomotives then in service on any of the lines and Wikipedia fills in the blanks. Note that none of the series of locomotives (Locobase 9159-9164) had either boiler pressure or grate area. The boiler pressure is an estimate.

The obvious edge in power represented by these Meyer articulateds must have excited the users at first. But by the time Sampite described the Reseau's motive power, he included the phrase "very trying" (tres-assujettisantes), especially when it came to maintenance or repairs. What might take two days for a workshop to fix on an ordinary machine, he contended, required eight days in the atelier for one of these. It's no surprise that the pair was retired by 1907.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID9164
RailroadBTziers via Montbazin-Gigean
Number in Class2
Road Numbers151-152
Number Built2
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)121,254 / 55,000
Engine Weight (lbs / kg)121,254 / 55,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)121,254 / 55,000
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)47.20 / 1200
Boiler Pressure (psi / kPa)123.30 / 8.50
High Pressure Cylinders (dia x stroke) (in / mm)13.78" x 21.65" / 350x550 (4)
Tractive Effort (lbs / kg)18,257 / 8281.25
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.64
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)96.30 / 8.95
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)1306 / 121.34
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1306 / 121.34
Evaporative Heating Surface/Cylinder Volume174.74
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area11,874
Power L12320
Power MT

All material Copyright ©
Wes Barris