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The AC6000CW is a diesel electric locomotive built by GE Transportation. This locomotive, along with the EMD SD90MAC, is one of the most powerful single-engined diesel locomotives in the world (the most powerful being the EMD SD80MAC), surpassed in horsepower by the dual-engine EMD DDA40X. ==History== The AC6000CW was designed at the height of a horsepower race between the two major locomotive manufacturers, Electro-Motive Division of London, Ontario and GE Transportation of Erie, Pennsylvania in the early to mid 1990s. The goal was . GE partnered with Deutz-MWM of Germany in 1994 to design and construct the 7HDL engine for the locomotives. The first locomotive constructed was the "Green Machine" GE 6000, the nickname due to the green paint scheme. The first production models were also built in 1995: CSX Transportation 600-602, and Union Pacific Railroad 7000-7009. After testing was completed by GE, they were released to their respective owners in late 1996. The initial locomotives suffered from various mechanical problems with the most severe being the engine itself. There were major vibration problems which were addressed by increasing the engine mass to alter the resonant frequency. This in turn caused problems with the twin turbochargers. These problems caused GE to push back full production of the new model until 1998. Changes such as stiffer materials and increased engine wall thickness (to increase mass) were in place at full production. GE built 106 AC6000CWs for Union Pacific with the older, proven 7FDL engine, rated for . These units were originally supposed to be converted to the 7HDL engine after the problems were worked out with the engine, but this never occurred. GE considers these units as AC6000CW "Convertibles," while UP classifies them as CW44/60ACs or AC4460CWs. The AC6000CW ended production in 2001, although Union Pacific's 75xx series remains in daily use as of 2010, mostly on rock and gravel trains in Texas. Union Pacific designates these units as C60AC, CSX as CW60AC. On June 21, 2001, all eight of the Australian railroad BHP Billiton's GE AC6000s combined to set the world record for the heaviest and longest train. They hauled and 682 wagons for between Yandi mine and Port Hedland. The train was long and carried of iron ore.〔(BHP breaks its own 'heaviest train' record ) ''Railway Gazette'' 1 August 2001〕 The record still stands. 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「GE AC6000CW」の詳細全文を読む スポンサード リンク
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