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The is a 6-axle, 3-bogied (Bo-Bo-Bo) DC electric locomotive designed for fast freight used by Japanese National Railways (JNR) and currently operated by its descendents JR West and JR Freight. ==Background and history== Originally these locomotives were designed for express freight on the Tokaido Main Line and Sanyo Main Line, in an attempt to counter the increasing market share being gained by road transport, by providing a fast alternative to road transport using wagons suitable for containerised freight. The prototype (initially numbered EF90 1, later becoming EF66 901) was built by Kawasaki Sharyō in 1966; at the time with a power of 3.9 MW it was the world's most powerful narrow-gauge locomotive.〔 The EF66 901 locomotive was retired from front-line service in 1996 and since 2001 is stored at Hiroshima Depot. The production series of locomotives were delivered from 1968, with 55 built between 1968 and 1974.〔 Due to increased demand, JR Freight began building more EF66s in 1989 - this second batch of locomotives was classified EF66-100, with locomotive numbered EF66-101 to EF66-133. 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「JNR Class EF66」の詳細全文を読む スポンサード リンク
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