L&YR Class 3
The L&YR Class 3 was a class of steam locomotives of the Lancashire and Yorkshire Railway introduced in 1891 with forty being built. George Hughes rebuilt six locomotives with superheaters between 1908 and 1909, they were later designated L&YR Class 4. All passed to the London, Midland and Scottish Railway at the grouping in 1923 but were withdrawn by 1930.
Design
Origins
The design originated with a William Barton Wright's L&YR [Class 2|4-4-0 of 1880] with driving wheels of and boiler pressure of. Aspinall then produced a modified version with 6ft wheels which was the basis for the class 3.Class 3
John Aspinall succeeded Barton Wright in 1886. He initially ordered more locomotives of Barton's Wright's design. but determined a driving wheels of and boiler pressure increased to should give increased speed for the same tractive effort.Class 4
Six locomotives were rebuilt with superheaters by George Hughes between 1908 and 1909. They became L&YR Class 4 in the Hughes classification scheme introduced in 1919. All six passed to the London, Midland and Scottish Railway at the grouping in 1923.There were two different versions of the rebuild. One had 19" bore cylinders and Joy valve gear. The other had 20" bore cylinders and Walschaerts valve gear.