CF de Alsace 2-2-2 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class L'Esperance (Locobase 4817)

Meyer's valve gear was the main feature on this successful design. Using a by-now standard gab rod arrangement, Meyer added an auxiliary valve that allowed the fixed cutoff inherent in the gab rod arrangement to be varied by the driver. Reder (1974, pl 54) has an excellent illustration.

The benefit lay in reduced fuel consumption. Trials saw L'Esperance consume only 13.3 lb of coke fuel per train mile, at least 27% less than competitive engines. He notes that the railroad was sufficiently pleased to order Le Succes as a sister and Meyer himself built the Mulhouse at his own expense.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID4817
RailroadCF de Alsace
Number in Class3
Road Numbers
Number Built3
BuilderJean-Jacques Meyer
Valve GearMeyer
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)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
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)72 / 1829
Boiler Pressure (psi / kPa)75.40 / 5.20
High Pressure Cylinders (dia x stroke) (in / mm)15" x 17.99" / 381x457
Tractive Effort (lbs / kg)3603 / 1634.30
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)125 - 1.811" / 46
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.53 / 2.60
Firebox Area (sq ft / m2)53.37 / 4.96
Grate Area (sq ft / m2) 8.93 / 0.83
Evaporative Heating Surface (sq ft / m2)501 / 46.54
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)501 / 46.54
Evaporative Heating Surface/Cylinder Volume136.16
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation673
Same as above plus superheater percentage673
Same as above but substitute firebox area for grate area4024
Power L11888
Power MT

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