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    UKP: LMS: Coronation

    Steam loco

    Class 8P Coronation

    The LMS Coronation Class is a class of express passenger steam locomotives designed by William Stanier. They were an enlarged and improved version of his previous design, the LMS Princess Royal Class, and on test were the most powerful steam locomotives ever used in Britain at 2,511 dbhp. 

    The first ten locomotives of the Coronation class were built in a streamlined form in 1937 by the addition of a steel streamlined casing. Five of these ten were specifically set aside to pull the Coronation Scot. Although a later batch of five unstreamlined locomotives was produced in 1938, most of the ensuing Coronation class were outshopped as streamliners. From 1944 until production ended in 1948, all-new engines were built in unstreamlined form, and all the streamliners had their casings removed. The last of the 38 locomotives was completed in 1948.

    After a successful decade of operations in the 1950s, the 1960s' modernisation plan was the ultimate undoing of the Coronations. The increasing use of diesel locomotives made many of the class redundant, and the electrification of the main line between London Euston and Crewe resulted in their banishment from this important section of the main line as there was insufficient clearance between the locomotives and the live wires. With no useful role to play, the survivors were scrapped from late 1962 to late 1964. Three locomotives were saved for preservation, with one of them ending up in the National Collection. 

    Builder LMS Crewe Works
    Introduced 1937
    Weight 110t (Streamlined) 106.94t (Conventional)
    TE 40,000 lbf
    Driving Wheel Dia 6ft 9in
    Wheel Arrangement 4-6-2
    Boiler Pressure 250 psi
    Cylinder Dimensions 16 1/2 x 28 in
    Num Cylinders 4
    Valve Gear Walschaerts
    Length 73ft 10 3/4in
    Height 13ft 3in
    Withdrawn 1964
    Max Speed 114mph

    Photo: Dan Cardwell

    Number Altnumber Name Status Note Livery Depot Pool Base Owner
    46235 6235   City of Birmingham D BLK PR Thinktank, Millennium Point, Birmingham PRE
    6229 98829   46229   Duchess of Hamilton D CLA YM MBSL National Railway Museum NRM
    6233 98834   46233   Duchess of Sutherland A The Princess Royal Class Locomotive Trust CLA SK MBSL Midland Railway - Butterley PRE