Takoradi Harbour 2-8-2 Locomotives in Ghana


Class Details by Steve Llanso of Sweat House Media

Class 11 (Locobase 20952)

Data from "Mikado Type Locomotive for Gold Coast Railway", Locomotive Magazine, Volume XXIX [29] (15 March 1923], pp. 65-66. Works numbers were 1377-1382 in 1922.

LM's report took special note of the relatively light axle loading for a freight engine generating 30,000 lb of tractive effort. The accompanying photo shows a relatively well-disguised Belpaire firebox set well back on a long boiler. A relatively capacious firebox included a brick arch, but the superheat ratio seems rather low at 11%.

Both Bissel trucks enjoyed a 3 1/2" (89 mm) play to either side and were equalized with the nearest driven axle. Inside-admission piston valve diameters measured 10" (254 mm) each.

Principal Dimensions by Steve Llanso of Middle Run Media
Class11
Locobase ID20952
RailroadTakoradi Harbour
CountryGhana
Whyte2-8-2
Number in Class6
Road Numbers11-16
Gauge3'6"
Number Built6
BuilderNasmyth Wilson
Year1922
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.75 / 3.89
Engine Wheelbase (ft / m)28.75 / 8.76
Ratio of driving wheelbase to overall engine wheelbase 0.44
Overall Wheelbase (engine & tender) (ft / m)51.69 / 15.76
Axle Loading (Maximum Weight per Axle) (lbs / kg)28,448 / 12,904
Weight on Drivers (lbs / kg)113,187 / 51,341
Engine Weight (lbs / kg)158,816 / 72,038
Tender Loaded Weight (lbs / kg)73,987 / 33,560
Total Engine and Tender Weight (lbs / kg)232,803 / 105,598
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)5 / 4.50
Minimum weight of rail (calculated) (lb/yd / kg/m)47 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)45 / 1143
Boiler Pressure (psi / kPa)160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)20.5" x 24" / 521x610
Tractive Effort (lbs / kg)30,482 / 13826.42
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.71
Heating Ability
Tubes (number - dia) (in / mm)159 - 2" / 51
Flues (number - dia) (in / mm)21 - 5.25" / 133
Flue/Tube length (ft / m)15.42 / 4.70
Firebox Area (sq ft / m2)150 / 13.94
Grate Area (sq ft / m2)32.14 / 2.99
Evaporative Heating Surface (sq ft / m2)1873 / 174.01
Superheating Surface (sq ft / m2)237 / 22.02
Combined Heating Surface (sq ft / m2)2110 / 196.03
Evaporative Heating Surface/Cylinder Volume204.29
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5142
Same as above plus superheater percentage5708
Same as above but substitute firebox area for grate area26,640
Power L16225
Power MT484.99

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