C.F. L'Afrique Occidentale Beyer-Garratt Locomotives in Senegal_and_Ivory_Coast


Class Details by Steve Llanso of Sweat House Media

Class 93 (Locobase 740)

Data from Gavin Hamilton's excellent compilation of Garratt data posted at [] (6 September 2005); and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p. 104. Works numbers were 2715-2724 in 1938. Two more batches of the same design followed: 93.211-93.220 (2731-2740) in 1939 and 93.221-93.227 (2748-2754) in 1941.

Smaller Double Mountain Garratts headed for metre-gauge operation in West Africa. They hauled trains in Senegal (Dakar-NIger Line) and Ivory Coast (Abijan-Bobo Dioubasso Railway).

Durrant described them as "handsome engines ...noticeably from the same stable as the streamlined Algerian Garratts." Design details included a wood-burning Bekpaire firebox, skyline casing, and double chimneys (stack) mounted transversely (side by side) over the smokebox.

"Despite their small wheels," wrote Durrant, "speeds up to 62 mph [100 kph] were attained on trial." [Locobase notes that the 93s' drivers would have been turning at 408 rpm at that speed.] A 93 could move 400 tons of trailing load up 1 in 40 (2 1/2%) grades.

All the engines operating in Senegal ultimately ended up on Ivory Coast railways.

Principal Dimensions by Steve Llanso of Sweat House Media

Class93
Locobase ID740
RailroadC.F. L'Afrique Occidentale
CountrySenegal and Ivory Coast
Whyte4-8-2+2-8-4
Number in Class27
Road Numbers93.201-210, 211.220, 221-227
GaugeMetre
Number Built27
BuilderSA Franco-Belge, Raismes
Year1938
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)25,760 / 11,685
Weight on Drivers (lbs / kg)206,080 / 93,476
Engine Weight (lbs / kg)331,520 / 150,375
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)331,520 / 150,375
Tender Water Capacity (gals / ML)7392 / 28
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 6.50 / 5.90
Minimum weight of rail (calculated) (lb/yd / kg/m)43 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)51 / 1295
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610 (4)
Tractive Effort (lbs / kg)46,240 / 20974.14
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.46
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)186 / 17.28
Grate Area (sq ft / m2)47 / 4.37
Evaporative Heating Surface (sq ft / m2)1991 / 184.97
Superheating Surface (sq ft / m2)258 / 23.97
Combined Heating Surface (sq ft / m2)2249 / 208.94
Evaporative Heating Surface/Cylinder Volume157.89
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation9400
Same as above plus superheater percentage10,434
Same as above but substitute firebox area for grate area41,292
Power L17068
Power MT604.90

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