le Dauphine/PLM 0-6-0 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class 2404 (Locobase 20897)

Data from Albert Jacquet, "'Engerth'" Locomotives on French and Belgian Railways", Locomotive Magazine, Volume XXVIII [28] (15 April 1922), pp. 104-106. Works num bers were 315-320 in 1857.

Although the PLM bought only the one Engerth locomotive described in Locobase 6851, an earlier railway serving the Dauphine region bought six six-coupled goods locomotives that put part of the weight on the tender's leading axle. As in most Engerths, grate and firebox areas seem very small for the boiler's size.

They hauled trains on the St Rambert-Grenoble line and joined the PLM's roster when that larger railway acquired the smaller line and continued as local goods locomotives in the Savoy and Dauphine divisions.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20897
Railroadle Dauphine/PLM
Number in Class6
Road Numbers2404-2409/1395-1400
Number Built6
Valve GearGooch
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.12 / 2.78
Engine Wheelbase (ft / m)26.48 / 8.07
Ratio of driving wheelbase to overall engine wheelbase 0.34
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)26,455 / 12,000
Weight on Drivers (lbs / kg)79,366 / 36,000
Engine Weight (lbs / kg)136,907 / 62,100
Tender Loaded Weight (lbs / kg)57,541 / 26,100
Total Engine and Tender Weight (lbs / kg)194,448 / 88,200
Tender Water Capacity (gals / ML)1795 / 6.80
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.10 / 5.50
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)52.80 / 1341
Boiler Pressure (psi / kPa)116 / 8
High Pressure Cylinders (dia x stroke) (in / mm)18.5" x 25.2" / 470x640
Tractive Effort (lbs / kg)16,106 / 7305.57
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.93
Heating Ability
Tubes (number - dia) (in / mm)197 - 2.165" / 55
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)15.58 / 4.75
Firebox Area (sq ft / m2)93.11 / 8.65
Grate Area (sq ft / m2)19.59 / 1.82
Evaporative Heating Surface (sq ft / m2)1833 / 170.30
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1833 / 170.30
Evaporative Heating Surface/Cylinder Volume233.80
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2272
Same as above plus superheater percentage2272
Same as above but substitute firebox area for grate area10,801
Power L12993
Power MT

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