The GNR Classes D2 and D3 were two classes of 51 4-4-0 steam locomotives designed by Henry Ivatt for the Great Northern Railway (GNR). They were the first 4-4-0s to be introduced by the GNR, and Ivatt's first original design for the railway as well.

The D2s with the new boilers were classified "D3" by both the GNR and LNER. The D2 (LNER D4) boilers were modified by Ivatt in 1901 to include a 3in wide water space around the firebox. This was to avoid scale accumulations around the foundation ring, and was actually a reversion to earlier GNR practice.

Its boiler was the first domed “standard” boiler with 4ft-5in diameter barrel, superseding the earlier straightback design. No straightback boilers were ever fitted to the 4-4-0s, their use being limited to Classes J5, J8, J9 0-6-0s; F3 0-4-2s; J16 0-6-0STs. The engine was rebuilt (1920) to Class D3 (see later under GRESLEY).

These included the LNER Class Y11 petrol locomotives, the diesel shunters which later became British Rail Class D3/9 and British Rail Class D3/14 and the Kitson-Still steam diesel hybrid locomotive. During the 1930s, Armstrong Whitworth supplied an experimental 1-Co-1 diesel-electric locomotive [2] and several diesel-electric railcars. [3]

The LNER 4-4-0 'American' Locomotives D1-D24. The 4-4-0 was introduced to Britain in the 1850s with outside cylinders. The inside cylinder form became the archetypical British express locomotive in the late 19th Century. When superseded by Atlantics or 4-6-0s the type was versatile enough to continue on secondary passenger duties in many areas.

British Rail Class D3/9 was a class of four locomotives built by the London and North Eastern Railway at their Doncaster Works in England. It was a diesel powered locomotive in the pre-TOPS period, they could also be used as mobile power stations if required.

LNER CLASS D3. Nos. 400 etc were renumbered 3400 etc (about 1924). Later boilers (fitted from 12/1926) had Ross “pop” safety valves instead of Ramsbottom. The first D3 was No. 4310 (1/1927). These boilers continued to be built down to 1932.

All were afterwards given boilers with 6′-4″ length firebox (Ivatt and LNER D3). After Grouping two engines (Nos. 1305 and 4320) were renewed with 4′-8″ diameter boilers (LNER D2).

2023年5月22日 · Built between 1913 and 1921, the sixty five locomotives of the G.N.R. H3 class were reclassified as K2/2’s by the LNER. They were nicknamed ‘Ragtimers’ due to their reputation for rough riding. Despite this they were a succesful …

The GNR Classes D2 and D3 were two classes of 51 4-4-0 steam locomotives designed by Henry Ivatt for the Great Northern Railway (GNR). They were the first 4-4-0s to be introduced by the GNR, and Ivatt's first original design for the railway as well.