Compagnie du C.F. du Congo Beyer-Garratt Locomotives in Congo


Class Details by Steve Llanso of Sweat House Media

Class 111 (Locobase 937)

Data from "Garratt Locomotive for the Congo Railway", Locomotive Magazine, Volume 19 (15 October 1915), pp. 225; and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p 150. Works number was 1744.

This was the first entry Locobase created for this single locomotive (in 2000); in this configuration the engine embodied all the features of a typical Garratt such as the Belpaire firebox and plate frames.The original, now described in Locobase 20113, did not have a superheater and had Serve tubes with nearly a inch greater diameter.


Class 111 (Locobase 20113)

Data from "Garratt Locomotive for the Congo Railway", Locomotive Magazine, Volume 19 (15 October 1915), pp. 225; and A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p. 151-152. Works number was 1744 in 1911.

They offered several variations on the basic Garratt design. One was the installation of large-diameter, internally finned Serve tubes. Another was an unusual arrangement for fuel burning: "Under the principal [round-top] boiler shell are two smaller cylindrical drums with fire tubes inside."

What appears to be a later superheated makeover of this locomotive appears in Locobase 937.


Class Class 112 (Locobase 938)

Data from A[rthur] E[dward] Durrant, Garratt Locomotives of the World (revised edition) (Newton Abbott, UK: David & Charles, 1981), p.152. Works numbers were 1901-1912 in 1919, 2001-2009 in 1924, and 2040-2049 in 1926.

Double six-coupled Garratts from a Belgian firm to a Belgian colony. Those delivered in 1919 and 1924 burned coal. The last ten arrived as oil-burners with a bunker capacity of 312 Imp gall 1,420 litres). They weighed five short tons more at 130,928 lb (54,850 kg). .

These followed the Congo River from the port of Matadi to Leopoldville.

Principal Dimensions by Steve Llanso of Middle Run Media
Class111111Class 112
Locobase ID937 20113 938
RailroadCompagnie du C.F. du CongoCompagnie du C.F. du CongoCompagnie du C.F. du Congo
CountryCongoCongoCongo
Whyte0-6-0+0-6-00-6-0+0-6-00-6-0+0-6-0
Number in Class1128
Road Numbers111111112-123
Gauge75 cm75 cm2'
Number Built1128
BuilderSA Saint LeonardSA Saint LeonardSA Saint Leonard
Year191119111919
Valve GearWalschaertWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.50 / 2.2114.44 / 2.2014.50 / 2.21
Engine Wheelbase (ft / m)34.45 / 10.5034.45 / 10.50 7.25 / 2.21
Ratio of driving wheelbase to overall engine wheelbase 0.42 0.422
Overall Wheelbase (engine & tender) (ft / m)34.45 / 10.5035.80 / 10.91
Axle Loading (Maximum Weight per Axle) (lbs / kg)21,056 / 9551
Weight on Drivers (lbs / kg)121,408 / 55,070111,999 / 50,802120,736 / 54,765
Engine Weight (lbs / kg)121,408 / 55,070111,999 / 50,802120,736 / 54,765
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)121,408 / 55,070111,999 / 50,802120,736 / 54,765
Tender Water Capacity (gals / ML)108 / 0.891214 / 4.60660 / 2.50
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.70 / 22 / 24 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)34 / 1731 / 15.5034 / 17
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)32.70 / 83032.70 / 83032.70 / 831
Boiler Pressure (psi / kPa)203.10 / 1400198.70 / 1370203.10 / 1400
High Pressure Cylinders (dia x stroke) (in / mm)12.2" x 13.78" / 310x350 (4)12.2" x 13.78" / 310x350 (4)13.38" x 13.75" / 340x349 (4)
Tractive Effort (lbs / kg)21,656 / 9823.0121,187 / 9610.2725,991 / 11789.33
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.61 5.29 4.65
Heating Ability
Tubes (number - dia) (in / mm)119 - 1.614" / 41119 - 2.165" / 55156 - 1.625" / 41
Flues (number - dia) (in / mm)16 - 4.291" / 10924 - 4.31" / 109
Flue/Tube length (ft / m) 8.37 / 2.5510.50 / 3.20 9.19 / 2.80
Firebox Area (sq ft / m2)80.73 / 7.50123.68 / 11.4986.10 / 8
Grate Area (sq ft / m2)19.16 / 1.7819.16 / 1.7822.30 / 2.07
Evaporative Heating Surface (sq ft / m2)841 / 78.161218 / 113.11939 / 87.27
Superheating Surface (sq ft / m2)116 / 10.78200 / 18.59
Combined Heating Surface (sq ft / m2)957 / 88.941218 / 113.111139 / 105.86
Evaporative Heating Surface/Cylinder Volume225.54326.64209.82
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation389138074529
Same as above plus superheater percentage435838075344
Same as above but substitute firebox area for grate area18,36424,57520,635
Power L1679453337839
Power MT740.22629.86858.83

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