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 Middle Run Media | |
|---|---|
| Class | 2404 |
| Locobase ID | 20897 |
| Railroad | le Dauphine/PLM |
| Country | France |
| Whyte | 0-6-0+4 |
| Number in Class | 6 |
| Road Numbers | 2404-2409/1395-1400 |
| Gauge | Std |
| Number Built | 6 |
| Builder | Schneider-Creusot |
| Year | 1857 |
| Valve Gear | Gooch |
| 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 / 800 |
| 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 Volume | 233.80 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2272 |
| Same as above plus superheater percentage | 2272 |
| Same as above but substitute firebox area for grate area | 10,801 |
| Power L1 | 2993 |
| Power MT | |