Lagos and Baro-Kano railways 4-8-0 Locomotives in Nigeria

Class Details by Steve Llanso of Sweat House Media

Class Modified Cape CSAR 7th Class (Locobase 20841)

Data from D[ennis] Rock Carling, 4-8-0 Tender Engines (New York: Drake Publishers, Inc, 1972), pp. 63 and serial 166, Table X [10] B, pp.104.

Both the Lagos Railway and the Baro-Kano Railways ordered satrurated-boiler Twelve wheelers in 1908. Both were closely derived from the Cape 7th class (Locobase 16128). The big difference, wrote Carling, was the use of large Belpaire fireboxes and grates in place of the South African round-tops.

About 25 years later in 1934, the Nigerian Railways fitted superheated boilers to two of them; see Locobase 20842. The other ten were retired in the same year.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassModified Cape CSAR 7th Class
Locobase ID20841
RailroadLagos and Baro-Kano railways
Number in Class11
Road Numbers244-254
Number Built11
BuilderNorth British
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)21.29 / 6.49
Ratio of driving wheelbase to overall engine wheelbase 0.56
Overall Wheelbase (engine & tender) (ft / m)44 / 13.41
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)84,448 / 38,305
Engine Weight (lbs / kg)107,744 / 48,872
Tender Loaded Weight (lbs / kg)56,339 / 25,555
Total Engine and Tender Weight (lbs / kg)164,083 / 74,427
Tender Water Capacity (gals / ML)2400 / 9.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.85 / 3.50
Minimum weight of rail (calculated) (lb/yd / kg/m)35 / 17.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42.75 / 1086
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)17" x 23" / 432x584
Tractive Effort (lbs / kg)22,468 / 10191.33
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.76
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)112 / 10.41
Grate Area (sq ft / m2)17.50 / 1.63
Evaporative Heating Surface (sq ft / m2)1088 / 101.08
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1088 / 101.08
Evaporative Heating Surface/Cylinder Volume180.06
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2975
Same as above plus superheater percentage2975
Same as above but substitute firebox area for grate area19,040
Power L13304
Power MT345.02

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