Locomotives named Ajax have included:
The London, Midland and Scottish Railway had the largest stock of steam locomotives of any of the 'Big Four' Grouping, i.e. pre-Nationalisation railway companies in the UK. Despite early troubles arising from factions within the new company, the LMS went on to build some very successful designs; many lasted until the end of steam traction on British Railways in 1968. For an explanation of numbering and classification, see British Rail locomotive and multiple unit numbering and classification.
The steam locomotives of British Railways were used by British Railways over the period 1948–1968. The vast majority of these were inherited from its four constituent companies, the "Big Four".
4-4-0, in the Whyte notation, denotes a steam locomotive with a wheel arrangement of four leading wheels on two axles, four powered and coupled driving wheels on two axles, and no trailing wheels.
A Crampton locomotive is a type of steam locomotive designed by Thomas Russell Crampton and built by various firms from 1846. The main British builders were Tulk and Ley and Robert Stephenson and Company.
The first Locomotives of the Great Western Railway (GWR) were specified by Isambard Kingdom Brunel, but Daniel Gooch was soon appointed as the railway's Locomotive Superintendent. He designed several different 7 ft 1⁄4 in broad gauge types for the growing railway, such as the Firefly and later Iron Duke Class 2-2-2s. In 1864 Gooch was succeeded by Joseph Armstrong who brought his standard gauge experience to the workshops at Swindon. To replace some of the earlier locomotives, he put broad gauge wheels on his standard gauge locomotives and from this time on all locomotives were given numbers, including the broad gauge ones that had previously carried just names.
The Great Western Railway Sir Watkin Class were 0-6-0T broad gauge steam locomotives. They were designed for working goods trains through to the underground Metropolitan Railway in London. This class was introduced into service between December 1865 and the last was withdrawn at the end of the GWR broad gauge in May 1892. They were all named after directors and senior officers of the railway.
Under the Whyte notation for the classification of steam locomotives, 2-4-0 represents the wheel arrangement of two leading wheels on one axle, four powered and coupled driving wheels on two axles and no trailing wheels. In most of North America it became known as a Porter.
Locomotives of the London and North Western Railway. The London and North Western Railway (LNWR) Locomotive Department was headquartered at Crewe from 1862. The Crewe Works had been built in 1840–43 by the Grand Junction Railway (GJR).
The eight Dido class locomotives were 0-6-0ST broad gauge locomotives operated on the South Devon Railway and Cornwall Railway and associated other adjacent railways. They were designed for goods trains but were also used on passenger trains when required.
The Bristol and Exeter Railway locomotives worked trains on the Bristol and Exeter Railway from 1 May 1849 until the railway was amalgamated with the Great Western Railway on 1 January 1876.
Vale of Neath Railway 0-6-0ST locomotives were 0-6-0ST steam locomotives for working the heavy goods traffic on the Vale of Neath Railway and its associated lines in Wales. The first of 13 broad gauge locomotives entered service in 1854 and the last was withdrawn in 1886. The remaining four were standard gauge locomotives.
The London and North Western Railway (LNWR) George the Fifth Class was a class of 4-4-0 passenger steam locomotive.
The London and North Western Railway (LNWR) "Precursor" Class was a type of 4-4-0 ("American") steam locomotive designed by the company's Chief Mechanical Engineer, George Whale. Introduced in 1904, it should not be confused with the LNWR 2-4-0 "Precursor" Class of 1874 designed by Francis Webb, the last example of which was scrapped in 1895. In 1906, a 4-4-2T ("Atlantic") tank variant of Webb's engine, the "Precursor Tank" Class, also entered service.
The London and North Western Railway (LNWR) Claughton Class was a class of 4-cylinder express passenger 4-6-0 steam locomotives.
The Daniel Gooch standard gauge locomotives comprise several classes of locomotives designed by Daniel Gooch, Superintendent of Locomotive Engines for the Great Western Railway (GWR) from 1837 to 1864.
The G&SWR 5 Class are 0-6-0T steam locomotives designed by Peter Drummond for the Glasgow and South Western Railway (G&SWR) and introduced in 1917. The class was originally designated 5 Class but, after the G&SWR's 1919 renumbering, this was changed to 322 Class. After passing to the London, Midland and Scottish Railway (LMS) in 1923 they were given power classification 2F.
The LNWR 4ft 6in Tank was a class of 220 passenger 2-4-2T locomotives manufactured by the London and North Western Railway in their Crewe Works between 1879 and 1898. The "4ft 6in" in the title referred to the diameter of the driving wheels – although the stated dimension was for the wheel centres – the nominal diameter including the tyres was 4 ft 8+1⁄2 in (1,435 mm).
The LNWR Newton Class was a class of ninety-six 2-4-0 steam locomotives built by the London and North Western Railway at their Crewe Works between 1866 and 1873.