SAR class 24

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SAR class 24
24 3696 at Beaconsfield Loco Depot, Kimberley; April 1983
24 3696 at Beaconsfield Loco Depot, Kimberley; April 1983
Numbering: 3601-3700
Number: 100
Manufacturer: North British
Year of construction (s): 1948-1949
Type : 1'D2 'h2
Gauge : 1067 mm ( cape track )
Length over coupling: 22,770 mm
Service mass: 72 t
Driving wheel diameter: 1300 mm
Impeller diameter: k. A.
Cylinder diameter: 483 mm
Piston stroke: 660 mm
Boiler overpressure: 138 N / cm²
Grate area: 3.34 m²
Superheater area : k. A.
Evaporation heating surface: k. A.
Train brake: Suction air brake

The class 24 locomotives of the South African Railways (SAR) are branch line steam locomotives with the wheel arrangement 1'D2 '(Berkshire). They are the only South African locomotives with this wheel arrangement.

The class 24 was the first South African locomotive to have a cast steel frame with cast-on cylinders, a design from the USA that was also used in the subsequent class 25 . For operation on weak tracks, the locomotives were designed for an axle load of only 11.9 tons, and the Vanderbilt type tender with a cylindrical tank received two three-axle bogies . With a total weight of 56 tons, it holds nine tons of coal and 20 cubic meters of water.

100 of these locomotives were delivered by North British Locomotive Works in 1948 and 1949 and initially used on routes in South West Africa . When they were ousted by diesel locomotives in 1961, they came to South Africa, mainly to the Transvaal and the Cape Province.

Some of the locomotives, including numbers 3655 and 3668, are still operational today; on the George – Knysna route they are in use as scheduled. Locomotive No. 3638 is a memorial in the Skukuza Rest Camp in the Kruger National Park .

Locomotive No. 3620 was brought to Australia in 2003 and was in service on the route between Cairns and Kuranda . However, steam operation on this route is currently suspended (as of August 2006).

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