22台 Deltic(55系列)C_0—C_0电力传动内燃机车于1981年12月末退役。五十年代初,英国铁路牵引动力乃是以蒸汽机车为主,内燃机车不但数量少、且功率和速度都比较小,直至五十年代末,首都伦敦及国内各主要城市间的铁路客运速度也才96.6公里/小时。相反,当时英国的高速公路却发展很快,私人小汽车日益增多,为了改变这种局 22 Deltic (55 series) C_0-C_0 electric drive diesel locomotives retired at the end of December 1981. In the early 1950s, British rail traction was dominated by steam locomotives. Not only was the number of diesel-powered locomotives small but the power and speed were relatively small. Until the late 1950s, the speed of railway passenger transport between the capital city of London and other major cities in China Only 96.6 km / hour. On the contrary, at that time the British highways developed rapidly and private cars were increasing. In order to change this kind of bureau