Southern Nigeria 2-6-2 Locomotives in Nigeria


Class Details by Steve Llanso of Sweat House Media

Class 13, 201 (Locobase 16043)

Data from "Narrow-Gauge Locomotive, Southern Nigeria Railways", The Locomotive, Volume XVI (15 February 1910), p. 36. See also Shehu Tijani Yusuf, The Socio-Economic Impact of the Railway in Northern Nigeria, Chapter 2 of a dissertation submitted to Leiden University (2015, January 20). Works numbers were 879-880 for the Baro-Kano, 881-886 for Southern Nigerian.

This set of metre-gauge Prairies had Belpaire fireboxes and large cabs. The latter were much wider at seat height than at footboard level. LM attributed the engines' design to the railways' consulting engineers, Messrs Elliot, Cooper & Shelford.

As shown in the works numbers information, the first two locomotives went directly to the Baro-Kano, a Northern Nigeria railway begun in 1908 to connect the port of Baro to Kano in the interior.It was the brainchild of Frederick Lugard, the NN's High Commissioner who felt keenly the NN's ability to compete with the Lagos Railway. Lugard explained his pursuit of a railway succinctly, as Shehu Iijani Yusuf reports: "the material development of Africa may be summed up in one word---Transport."

It can be argued that Lugard's efforts had an effect, as the NN merged with the Lagos Railway in 1912 to form Nigerian Railways.


Class 41 (Locobase 21198)

Data from "Engine Nos 41-42", Diagram drafted September 1949 at Ebutemetta. (Thanks to Teemu Koivumaki for finding this diagram and emailing it to me on 29 August 2024.) Works numbers were 2849-2850 in January 1948.

Compared to the 2-6-2 Prairie engines delivered to the Baro-Kano 38 years earlier (Locobase 16043), these tanks had higher-pressure boilers and more heating surface area. Consequently, they displayed more power.

Principal Dimensions by Steve Llanso of Middle Run Media
Class13, 20141
Locobase ID16043 21198
RailroadSouthern NigeriaSouthern Nigeria
CountryNigeriaNigeria
Whyte2-6-22-6-2T
Number in Class82
Road Numbers13-14, 201-20641-42
Gauge3'6"3'6"
Number Built82
BuilderNasmyth WilsonNasmyth Wilson
Year19091948
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.50 / 3.2010 / 3.05
Engine Wheelbase (ft / m)21.50 / 6.5524 / 7.32
Ratio of driving wheelbase to overall engine wheelbase 0.49 0.42
Overall Wheelbase (engine & tender) (ft / m)24 / 7.32
Axle Loading (Maximum Weight per Axle) (lbs / kg)24,940 / 11,313
Weight on Drivers (lbs / kg)73,920 / 33,530
Engine Weight (lbs / kg)86,128 / 39,067105,840 / 48,008
Tender Loaded Weight (lbs / kg)30,016 / 13,61530,016 / 13,615
Total Engine and Tender Weight (lbs / kg)116,144 / 52,682135,856 / 61,623
Tender Water Capacity (gals / ML)2400 / 9.09960 / 3.64
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.85 / 2.60
Minimum weight of rail (calculated) (lb/yd / kg/m)41 / 20.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)48 / 121942.75 / 1086
Boiler Pressure (psi / kPa)150 / 1030180 / 1240
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x50815" x 20" / 381x508
Tractive Effort (lbs / kg)11,953 / 5421.8016,105 / 7305.11
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.59
Heating Ability
Tubes (number - dia) (in / mm)192 - 1.75" / 44192 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.83 / 3 9.83 / 3
Firebox Area (sq ft / m2)93 / 8.6498 / 9.10
Grate Area (sq ft / m2)14 / 1.3014 / 1.30
Evaporative Heating Surface (sq ft / m2)987 / 91.691024 / 95.13
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)987 / 91.691024 / 95.13
Evaporative Heating Surface/Cylinder Volume241.28250.33
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation21002520
Same as above plus superheater percentage21002520
Same as above but substitute firebox area for grate area13,95017,640
Power L142604747
Power MT424.73

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