Data from August Perdonnet et Camille Polonceau, Nouveau Portefeuille de L'Ingenieur des Chemins de Fer, Tome Second (Paris: Librairie Scientifique, Industrielle et Agricole, 1866), pp. 528-529. Supplemented by Wikimedia at [], last accessed 22 September 2018.
Little four-coupled terminal switcher with a higher axle loading than any other contemporary Midi class.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 401 |
| Locobase ID | 11321 |
| Railroad | Midi |
| Country | France |
| Whyte | 0-4-0T |
| Number in Class | |
| Road Numbers | 401-406 |
| Gauge | Std |
| Number Built | |
| Builder | Gouin |
| Year | 1855 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.87 / 2.40 |
| Engine Wheelbase (ft / m) | 7.87 / 2.40 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 7.87 / 2.40 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 31,967 / 14,500 |
| Weight on Drivers (lbs / kg) | 55,556 / 25,200 |
| Engine Weight (lbs / kg) | 55,556 / 25,200 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | / 2.30 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 46 / 23 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 47.60 / 1210 |
| Boiler Pressure (psi / kPa) | 98.60 / 680 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.75" x 18.11" / 400x460 |
| Tractive Effort (lbs / kg) | 7910 / 3587.92 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 7.02 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 125 - 1.811" / 46 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.20 / 3.11 |
| Firebox Area (sq ft / m2) | 55.33 / 5.14 |
| Grate Area (sq ft / m2) | 9.26 / 0.86 |
| Evaporative Heating Surface (sq ft / m2) | 659 / 61.26 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 659 / 61.26 |
| Evaporative Heating Surface/Cylinder Volume | 161.37 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 913 |
| Same as above plus superheater percentage | 913 |
| Same as above but substitute firebox area for grate area | 5456 |
| Power L1 | 1792 |
| Power MT | 142.22 |