Under the Whyte notation for the classification of steam locomotives, 0-4-0 represents one of the simplest possible types, that with two axles and four coupled wheels, all of which are driven. The wheels on the earliest four-coupled locomotives were connected by a single gear wheel, but from 1825 the wheels were usually connected with coupling rods to form a single driven set.
0-6-0 is the Whyte notation designation for steam locomotives with a wheel arrangement of no leading wheels, six powered and coupled driving wheels on three axles, and no trailing wheels. Historically, this was the most common wheel arrangement used on both tender and tank locomotives in versions with both inside and outside cylinders.
4-4-0 is a locomotive type with a classification that uses the Whyte notation for the classification of steam locomotives by wheel arrangement and represents the arrangement: four leading wheels on two axles, four powered and coupled driving wheels on two axles, and a lack of trailing wheels. Due to the large number of the type that were produced and used in the United States, the 4-4-0 is most commonly known as the "American" or "Eight-Wheeler" type, but the type subsequently also became popular in the United Kingdom, where large numbers were produced.
Under the Whyte notation for the classification of steam locomotives, 2-6-0 represents the wheel arrangement of two leading wheels on one axle, usually in a leading truck, six powered and coupled driving wheels on three axles and no trailing wheels. This arrangement is commonly called a Mogul.
The South West African Zwillinge 0-6-0T of 1898 was a narrow gauge steam locomotive from the German South West Africa era.
The South African Railways Class 15C 4-8-2 of 1925 was a steam locomotive.
The South African Railways Class H 4-10-2T, introduced in 1899, was a steam locomotive from the pre-Union era in the Colony of Natal.
The South African Railways Class NG G11 2-6-0+0-6-2 of 1919 is a class of narrow gauge steam locomotives.
The South African Railways Class C 4-6-0T of 1879 was a steam locomotive from the pre-Union era in the Colony of Natal.
The South African Railways Class NG1 0-4-0T of 1900 was a narrow-gauge steam locomotive from the pre-Union era in Transvaal.
The South African Railways Class NG2 0-4-2ST of 1897 was a narrow-gauge steam locomotive from the pre-Union era in Transvaal.
The South African Railways Class NG4 4-6-2T of 1911 was a narrow-gauge steam locomotive from the pre-Union era in the Colony of Natal.
The South African Railways Class NG6 4-4-0 of 1895 was an ex-Mozambican narrow-gauge steam locomotive from the Beira Railway era.
The South African Railways Class NG7 2-6-0 of 1902 was a narrow gauge steam locomotive from the pre-Union era in the Cape of Good Hope.
In the early 1900s, 2 ft narrow-gauge railway lines started playing a significant role in South Africa. They facilitated the transport of various agricultural and mineral produce from locations hardly accessible by road. They therefore enabled many communities to become prosperous.
The Natal Government Railways Class K 2-6-0T of 1877 was a South African steam locomotive from the pre-Union era in the Natal Colony.
The South West African Class Hc 0-6-0T of 1907 was a narrow gauge steam locomotive from the German South West Africa era.
The Cape Government Railways Type C 0-4-0T Midget of 1902 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.
The Cape Government Railways Type A 2-6-4T of 1902 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.
The Walvis Bay 2-4-2T Hope of 1899 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.
