Cape Government Beyer-Garratt Locomotives in South_Africa


Class Details by Steve Llanso of Sweat House Media

Class Fairlie (Locobase 12867)

Data from D F Holland, Steam Locomotives of the South African Railroads, Volume I: 1859-1910 (New York: Drake Publishers, 1972), p. 27.

Holland reports that this locomotive was ordered to meet the need for more power and that it didn't prove entirely successful. The crews found the cab cramped and difficult to communicate within. Water and coal supplies needed to grow and the engine units unrestrained in their swivelling, particularly during derailments.

The next Fairlie would do better; see Locobase 12868.


Class Fairlie (Locobase 12868)

Data from D F Holland, Steam Locomotives of the South African Railroads, Volume I: 1859-1910 (New York: Drake Publishers, 1972), p. 27.

Avonside's second Fairlie included the improvements that experience with the first (Locobase 12867) suggested. Roscoe lubrication improved the action of the ball joints that coupled elements of the steam piping. But, Holland says, the crews still didn't like the cabs and particularly the fireboxes. A particular problem was the difficulty in cleaning out clinker and ash - it simply couldn't be done without stopping the locomotive(s). He quand totes a fireman's lament:

"It was back-breaking work and I have never forgotten it. It was a very clumsy engine, and the men detested it."

No others followed and the Fairlie was scrapped in 1903.

NB: Tube length is an estimate based on the calculation of tube surface area by subtracting reported firebox heating surface from reported total evaporative heating surface

Principal Dimensions by Steve Llanso of Middle Run Media
ClassFairlieFairlie
Locobase ID12867 12868
RailroadCape GovernmentCape Government
CountrySouth AfricaSouth Africa
Whyte0-6-0+0-6-00-6-0+0-6-0
Number in Class11
Road Numbers
Gauge3'6"3'6"
Number Built11
BuilderAvonsideAvonside
Year18751888
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.50 / 2.29 7.50 / 2.29
Engine Wheelbase (ft / m)29 / 8.8429 / 8.84
Ratio of driving wheelbase to overall engine wheelbase 0.26 0.26
Overall Wheelbase (engine & tender) (ft / m)29 / 8.8429 / 8.84
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)80,640 / 36,57880,640 / 36,578
Engine Weight (lbs / kg)80,640 / 36,57880,640 / 36,578
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1008 / 3.821008 / 3.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.30 / 2 2.30 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 1122 / 11
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)39 / 99139 / 991
Boiler Pressure (psi / kPa)135 / 930135 / 930
High Pressure Cylinders (dia x stroke) (in / mm)11.5" x 18" / 292x457 (4)11.5" x 18" / 292x457 (4)
Tractive Effort (lbs / kg)14,008 / 6353.9314,008 / 6353.93
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.76 5.76
Heating Ability
Tubes (number - dia) (in / mm)113 - 1.5" / 0
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.25
Firebox Area (sq ft / m2)90 / 8.3690 / 8.36
Grate Area (sq ft / m2)14 / 1.3014 / 1.30
Evaporative Heating Surface (sq ft / m2)998 / 92.75998 / 92.75
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)998 / 92.75998 / 92.75
Evaporative Heating Surface/Cylinder Volume230.60230.60
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation18901890
Same as above plus superheater percentage18901890
Same as above but substitute firebox area for grate area12,15012,150
Power L129362936
Power MT481.60481.60

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