2-4-2

The engine Hope, c. 1948

In 1899, the Walvis Bay Railway in the British territory of Walvis Bay, a Cape of Good Hope exclave in Deutsch-Südwest-Afrika (German South West Africa), placed a single tank locomotive in service. The engine, named Hope and built by Kerr, Stuart and Company, remained in service until 1904 when operations on the railway were suspended. The line was abandoned in 1905, partly as a result of being buried by a sandstorm.[1][2]

A 2-4-2 tank locomotive, built by Baldwin Locomotive Works in 1899 and used on the private Raahe track in Finland, was later bought by the Finnish State Railways.

K class no. K88 Washington

In 1877, when the New Zealand Railways needed new motive power, the road turned to the Rogers Locomotive Works who supplied eight 2-4-2 tender locomotives between 1877 and 1879 that were designated the "K" class. These were the first American-built locomotives in New Zealand and proved to be quite successful.

Three of these locomotives have been preserved. No. K88 Washington was used on the first through train between Christchurch and Dunedin in 1877. After fifty years of service, Washington was dumped in the Oreti River, Southland, as a flood protection measure. In 1974, the locomotive was exhumed from her watery grave and, over the next eight years, restored to full active service.

Sister locomotives numbers K92 and K94 have also been salvaged from the Oreti river. No. K92 has been restored to full active service and has re-established her position on the Kingston Flyer train, which was made famous by the K class at the end of the 19th century.

London and North Western Railway 2-4-2T

The earliest British use of the 2-4-2 wheel arrangement appears to have been no. 21 White Raven, supplied to the St Helens Railway by James Cross of Sutton Works in 1863. It was soon rebuilt as a 2-4-0 tender locomotive and eventually passed into the stock of the London and North Western Railway (L&NWR).[3]

In 1864, Robert Sinclair of the Great Eastern Railway designed the first of six 2-4-2 tank classes built by the railway, eventually totalling 262 locomotives by 1912.

Francis Webb of the London and North Western Railway also designed two 2-4-2 classes which eventually totaled 380 locomotives, built between 1879 and 1898.

Other railway companies that built large numbers of the type included the Lancashire and Yorkshire Railway (L&YR) with 330 locomotives built between 1889 and 1911, the North Eastern Railway with 60 locomotives built between 1886 and 1892 and the Manchester, Sheffield and Lincolnshire Railway with 49 locomotives built between 1889 and 1898. One of John Aspinall's Class 5 locomotives, built for the L&YR in 1889, is preserved at the National Railway Museum, York.

The tank-type 2-4-2T was not uncommon in the U.S. around the dawn of the twentieth century in both suburban passenger service and on logging railroads. The Baldwin Locomotive Works built a demonstrator tender type engine which was displayed at the Columbian Exposition of 1893. This led to the type's name. This locomotive featured ambitious seven foot tall driving wheels, and was one of the first tender-equipped locomotives with a trailing truck. This freed the firebox from having to sit narrowly between, or above, the drive wheels, and was a very influential design.

This inspired three major U.S. railroads (Atlantic Coast Line, Burlington and Reading) to purchase a few of the type. But the two-wheeled lead truck was never well-suited to high speed service on far-flung North American rails. Some were converted to 4-4-2 Atlantic types and others were converted to 4-6-0 Ten Wheelers. The display locomotive was donated to Columbia University. In one respect, however, it was a success. A great many Atlantic types would follow, most based on the design.[4]