Beira, Mashonaland & Rhodesia 4-8-2 Locomotives in Rhodesia


Class Details by Steve Llanso of Sweat House Media

Class 8 (Locobase 20411)

Data from A E Durrant, The Smoke That Thunders (Harare, Zimbabwe: African Publishing Group, 1997), p. 50. Works numbers were 16216-16225 in 1904.

Locobase 10540 shows the original Twelve-wheeler design supplied to the CSAR as reboilered by the railway. LM wrote that locomotive superintendent W J Hosgood converted five similar BM&R 4-8-0s to shunters (switchers). The work was performed at the BM&R's workshops in Umtali.

Changes included the addition of a bogie carrying one axle "pivotted at a radius of 5 ft 7 1/2 in [1.71 m]" and a new round-topped boiler replacing the original Belpaire firebox.

Principal Dimensions by Steve Llanso of Middle Run Media

Class8
Locobase ID20411
RailroadBeira, Mashonaland & Rhodesia
CountryRhodesia
Whyte4-8-2T
Number in Class5
Road Numbers8-10, 13-14
Gauge3'6"
Number Built5
BuilderM&R
Year1915
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12 / 3.66
Engine Wheelbase (ft / m)28.79 / 8.78
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)28.79 / 8.78
Axle Loading (Maximum Weight per Axle) (lbs / kg)24,864 / 11,278
Weight on Drivers (lbs / kg)95,760 / 43,436
Engine Weight (lbs / kg)142,912 / 64,824
Tender Loaded Weight (lbs / kg)85,008 / 38,559
Total Engine and Tender Weight (lbs / kg)227,920 / 103,383
Tender Water Capacity (gals / ML)1750 / 6.63
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 3.85 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 20
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42.75 / 1086
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)17" x 23" / 432x584
Tractive Effort (lbs / kg)21,146 / 9591.68
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.53
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.75 / 3.28
Firebox Area (sq ft / m2)112 / 10.41
Grate Area (sq ft / m2)17 / 1.58
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 Computation2720
Same as above plus superheater percentage2720
Same as above but substitute firebox area for grate area17,920
Power L13109
Power MT286.31

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