Midi 0-4-0 Locomotives in France


Class Details by Steve Llanso of Sweat House Media

Class 401 (Locobase 11321)

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 Sweat House Media

Class401
Locobase ID11321
RailroadMidi
CountryFrance
Whyte0-4-0T
Number in Class
Road Numbers401-406
GaugeStd
Number Built
BuilderGouin
Year1855
Valve GearStephenson
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 wheelbase1
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)55,556 / 25,200
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 / 6.80
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 Volume161.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation913
Same as above plus superheater percentage913
Same as above but substitute firebox area for grate area5456
Power L11792
Power MT142.22

All material Copyright © SteamLocomotive.com
Wes Barris