DP1 Deltic Prototype Profile and Models

English Electric DP1, commonly known as 'Deltic', is a prototype locomotive employing two Napier Deltic engines. The high power of the locomotive at an acceptably low axleload resulted in 22 similar locomotives being ordered by British Railways for use on East Coast Main Line express passenger services, becoming the British Rail Class 55. The locomotive first saw service on the London Midland Region in 1955, generally operating fast London to Liverpool freight trains; it was withdrawn and after modifications re-entered service in 1956. Tests were carried out on the Settle to Carlisle line in August/September 1956, after which it operated passenger trains, The Shamrock and The Merseyside Express, between London and Liverpool, followed by London-Carlisle trains, and in 1957, returning to London-Liverpool trains. To British eyes, the locomotive's bulldog nose styling was reminiscent of American locomotives (partly because English Electric initially planned to offer the type for export). DP1 was in service until 24 November 1960 when a severe oil leak in one of the engines was discovered. However no repairs were sanctioned and the locomotive was withdrawn from service in March 1961. DP1 has been preserved.

(Information provided via Wikipedia)

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