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Cape Government Railways class 7 (1896)
South African class 7A
South Africa | 1896
46 produced
7A No. 1007 in September 1997 in Voorbaai
7A No. 1007 in September 1997 in Voorbaai
Ian Roberts

The second type of Class 7 4-8-0 locomotives procured by the Cape Government Railways was built from 1896 for the central and eastern regions. They all came from British manufacturers and 45 were delivered by 1898, while a single one came from Dübs in 1901.

These locomotives were a development of the 1891 model and again were designed by Beatty. Compared to their predecessors, they had a larger boiler and a larger tender. Only the first driving axle had no wheel flanges. In the 1930s, many were rebuilt with a superheater and piston valves.

The Sudanese military received eight identical locomotives in 1897 and 1898 and used them in the Mahdist War. They were also called “Dongola class”. They had been given water pipes to the front so that an additional tender could be coupled there for use in the desert.

Of the GCR's locomotives, all but two, which had previously been sold, were taken over by the SAR in 1912. During the First World War, some were used in the conquest of German South West Africa. Due to their suitability in this region, more were later relocated there. After replacing them with more modern steam locomotives and diesel locomotives, the SAR retired the last class 7A locomotives in 1972.

Variantas builtsuperheated
General
Built1896-1898, 1901
ManufacturerSharp, Stewart & Co., Dübs & Co., Neilson & Co.
Axle config4-8-0 (Twelve-wheeler) 
Gauge3 ft 6 in (Cape gauge)
Dimensions and Weights
Length53 ft 5 1/4 in
Wheelbase21 ft 3 1/2 in
Rigid wheelbase12 ft
Total wheelbase46 ft 2 in
Service weight104,160 lbs109,988 lbs
Adhesive weight80,192 lbs84,679 lbs
Total weight180,544 lbs186,379 lbs
Axle load20,160 lbs21,729 lbs
Water capacity3,122 us gal
Fuel capacity12,320 lbs (coal)
Boiler
Grate area17.5 sq ft18 sq ft
Firebox area102 sq ft113 sq ft
Tube heating area976 sq ft806 sq ft
Evaporative heating area1,078 sq ft919 sq ft
Superheater area206 sq ft
Total heating area1,078 sq ft1,125 sq ft
Variantas builtsuperheated
Power Plant
Driver diameter42.8 in
Boiler pressure160 psi180 psi
Expansion typesimple
Cylinderstwo, 17 x 23 in
Power
Power sourcesteam
Estimated power500 hp (373 kW)700 hp (522 kW)
Optimal speed15 mph19 mph
Starting effort21,146 lbf23,789 lbf
Calculated Values
steam locomotive
freight
H.M. Beatty
last changed: 01/2024
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