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The RENFE Series 333 are high power six-axle diesel-electric locomotives built in the 1970s; at the time of their introduction they were the most powerful non-electric locomotives in Spain. After three decades of service the class were rebuilt incorporating Alstom's newer technology, and thus extending their life - these rebuilt machines were given the sub-class names 333.3 and 333.4 ==Background== In the early 1970s, RENFE was looking for a new, diesel-engined locomotive capable of both hauling express trains and high-tonnage heavy freight trains nationwide at a steady speed of .〔:es:Serie 333 de Renfe 〕 At the time, RENFE's dieselization program, with the 316 and 318 series CC locomotives, later followed by the more numerous 319 and 321, had displaced steam powered traction and were responsible for much of the work requiring higher-powered locomotives.〔 The Class 319, produced in collaboration between Macosa and General Motors, had shown good performance, which influenced the decision to choose a locomotive of the General Motors type GT 26, ().〔 In this series of locomotives, instead of taking the typical single cabin General Motors design it was decided to used a two cabined design; the Scandinavian manufacturer Nohab had also been producing GM engined locomotives (having acquired a license to produce GM engined locomotives of its own designs〔(History of the NOHAB Works )〕), and a model was chosen based on the JT-26 with the Nohab bi-cabin box (See DSB class MZ) which was used by the Danske Statsbaner (DSB).〔 RENFE chose the variant model MZ1 which had a power output of almost , they were also able to supply electrical train heating - a first in Spain.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「RENFE Class 333」の詳細全文を読む スポンサード リンク
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