Coutonu-Niger 4-6-0 Locomotives in French_West_Africa


Class Details by Steve Llanso of Sweat House Media

Class 28 (Locobase 15840)

Data from "Re: Pinguely : tout (ou presque) sur ces petites bTcanes!" par SIXTIFS, 09 Mai 2013, 22:45, last accessed 4 May 2014 at [link], original article M R Godfernaux, "Note sur les Chemins de Fer de L'Afrique Occidentale Francais," Revue General des Chemins de Fer, Vol XXXIII (1910). pp. 12- , especially p. 27.. Also see Jean du Taillis, "Le Chemin De Fer du Dahomey", Revue de geographie, Vol 53 (Juillet-Decembre 1903), p. 421-Works numbers were 214 in 1906, 223 in 1907.

These were the biggest locomotives on the Coutonou-Niger line that connected the French colonies of Dahomey (aka Benin) and Niger. Thirteen other tank engines served the line, 9 six-coupleds of 30 tonnes (66,139 lb) each and each capable of pulling 140 tonnes (154 short tons) for 60 km (37.3 miles) between water stops and 4 four-coupleds weighing 18 tonnes each.

The railroad grew steadily in the first decade of the 1900s. Godfernaux offered a table in which the route km increased from 103 in 1904 to 268 km in 1908. Passenger counts rose 572% to 106,967 and passenger km increased from 605,477 to 4,220,082 or 690%. Ton-kilometers grew 1,196% to 1,241,644. Despite these gains, earnings per km remained static from 1905-1908 and while the yearly deficit per route km decreased 30%, it still came to 3,672 francs.

Principal Dimensions by Steve Llanso of Middle Run Media
Class28
Locobase ID15840
RailroadCoutonu-Niger
CountryFrench West Africa
Whyte4-6-0T
Number in Class2
Road Numbers28.101-28.102
GaugeMetre
Number Built2
BuilderPinguely
Year1906
Valve GearHeusinger
Locomotive Length and Weight
Driver Wheelbase (ft / m) 8.86 / 2.70
Engine Wheelbase (ft / m)18.37 / 5.60
Ratio of driving wheelbase to overall engine wheelbase 0.48
Overall Wheelbase (engine & tender) (ft / m)18.37 / 5.60
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)63,934 / 29,000
Engine Weight (lbs / kg)81,130 / 36,800
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)36 / 18
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)47.20 / 1200
Boiler Pressure (psi / kPa)169.70 / 1170
High Pressure Cylinders (dia x stroke) (in / mm)14.96" x 22.05" / 380x560
Tractive Effort (lbs / kg)15,081 / 6840.63
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.24
Heating Ability
Tubes (number - dia) (in / mm)134 - 1.614" / 41
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.66 / 3.25
Firebox Area (sq ft / m2)69.43 / 6.45
Grate Area (sq ft / m2)12.06 / 1.12
Evaporative Heating Surface (sq ft / m2)673 / 62.54
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)673 / 62.54
Evaporative Heating Surface/Cylinder Volume150.03
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2047
Same as above plus superheater percentage2047
Same as above but substitute firebox area for grate area11,782
Power L13036
Power MT314.07

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