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    UKP: BR Diesel: DP1

    Diesel Loco

    Diesel Prototype 1

    English Electric DP1, commonly known as Deltic, was a prototype 3,300 hp (2,500 kW) demonstrator locomotive employing two Napier Deltic engines, built by English Electric in 1955.  The high power of the locomotive at an acceptably low axle load resulted in 22 similar locomotives being ordered by British Railways for use on East Coast Main Line express passenger services; the serial production of which became the British Rail Class 55

    Length 66'
    Width 8' 9.5"
    Introduced 1955
    Withdrawn 1961
    Wheel Arrangement CoCo
    Builder English Electric
    Power 3300HP
    Weight 108t
    TE 52500 lbf
    Engine Napier Deltic D18-25 (x2)
    Transmission Diesel Electric
    Max Speed 106mph
    Driving Wheel Dia 3ft 7ins
    Wheelbase 14' 4" bogies
    Height 12' 10.5"

    Deltic DP1 at Locomotion Shildon

    Photo: Dan Cardwell

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    Number Alt number Name Status Pool Depot Note
    DP1 89523 Deltic P SM CoCo