Portal:Trains/Selected article/Week 23, 2008

The SR U Class were 2-6-0 mogul steam locomotives designed by Richard Maunsell for passenger duties on the Southern Railway in Great Britain. They were to be used on cross-country and semi-fast expresses. A highly standardised class of locomotive, the U Class project was given greater emphasis after the Sevenoaks railway accident which involved another class of locomotive, Harry Wainwright's SECR K Class 2-6-4T. Several members of the U Class were rebuilds of the K Class at the Ashford railway works, and were soon granted the nickname 'U-Boats.' The U Class was a reliable and economical design, and proved to be more than capable of attaining speeds in excess of 70 mph. Able to operate over most of the Southern Railway network after grouping in 1923, the U Class survived until 1966, when all had been withdrawn from service. Four examples have been preserved, two at the Bluebell Railway, and two others at the Mid-Hants Railway.