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The EMD Model 40 was a two-axle diesel-electric switcher locomotive built by Electro-Motive Corporation (EMC), and its corporate successor, General Motors' Electro-Motive Division (EMD) between August 1940 and April 1943. Nicknamed "critters", eleven examples of this locomotive were built.
The class was introduced in 1928 and was a post-grouping development of the Midland Railway 483 Class with modified dimensions and reduced boiler mountings.. The numbering continued from where the Midland engines left off at 563 and eventually reached 700. 138 were built, though numbering is slightly complicated by renumberings and transfers.
Design of this class was based on rebuilds by Henry Fowler of the Midland Railway 2441 Class introduced in 1899 by Samuel Waite Johnson.These rebuilds featured a Belpaire firebox and improved cab. 422 Jinties were built between 1924 and 1931; this class was just one of the Midland designs used on an ongoing basis by the LMS.
The Midland favoured building large numbers of relatively small, low-powered engines to standardised designs. Each engine was cheaper to build and run than a larger equivalent and while more locomotives were required, the Midland's Derby Works was able to achieve economies of scale. The Midland found that a single small engine was sufficient on ...
The Midland shaped the subsequent LMS locomotive policy until 1933. Its locomotives (which it always referred to as engines) followed a corporate small engine policy, with numerous class 2F, 3F and 4F 0-6-0s for goods work, 2P and 4P 4-4-0s for passenger work, and 0-4-4T and 0-6-0T tank engines.
Designed by George Hughes, chief mechanical engineer of the LMS, and built at the ex-L&YR works at Horwich and the ex-LNWR works at Crewe.The inspiration came from a Caledonian Railway 2-6-0 design at the grouping, however the cylinders were too large for the LMS's English section's loading gauge, resulting in Hughes having to adapt the concept. [3]
A hydraulic tappet, also known as a hydraulic valve lifter or hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. Conventional solid valve lifters require regular adjusting to maintain a small clearance between the valve and its rocker or cam follower .
The Midland Railway Class 2 4-4-0 was a series of 12 classes of 4-4-0 steam locomotives built by and for the Midland Railway between 1876 and 1901 while Samuel W. Johnson held the post of locomotive superintendent. They were designed for use on express passenger trains but later on were downgraded to secondary work when more powerful types were ...