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The Class 221 ''Super Voyager'' is a class of diesel-electric multiple-unit express trains built in Bruges, Belgium, by Bombardier Transportation in 2001/02. The Class 221 are similar to the Class 220 ''Voyager'' units, but were built with a tilting mechanism enabling up to six degrees of tilt to allow higher speeds on curved tracks, most have five coaches, and they have a different bogie design. They have a maximum speed of . Currently these trains are divided between two operators, Virgin Trains (20 sets) and CrossCountry (23 sets). The sets operated by CrossCountry have now had their tilt function disabled to improve reliability and reduce maintenance costs.〔 ==Details== The Class 221s were produced as 5- or 4-coach sets. Each coach is equipped with a Cummins QSK19 diesel engine producing at 1,800 rpm,〔(【引用サイトリンク】 Class 221 data ) 〕 driving an electrical generator which powers two motors, each driving one (inner) axle per bogie via a cardan shaft and final drive. can be travelled between refuellings. The coach bodies, the engines and most of the equipment of the Class 221s are the same as the Class 220s, but the bogies are very different: the Class 220 ''Voyager'' B5000 bogies have inside-frames which expose the whole of the wheel faces, while the Class 221 ''SuperVoyager'' Y36 bogies have a more traditional outside-framed bogie. Unlike the Class 220s, the Class 221s were built with a hydraulic-actuated tilting system to run at high speed around bends, though this has now been removed from the 23 sets operated by CrossCountry.〔 Each coach weighs between 55 and 57 tonnes, with a total train weight of 281.9 tonnes for a 5-car set (227 tonnes for a 4-car set). The trains have air-operated (pneumatic) and rheostatic brakes, with an emergency stopping distance of 350m at .〔 Class 221 units do not have automatic sanding equipment, and instead have "one-shot" sanders which activate when all of the following conditions are met: # The emergency stop button has been pressed; # Wheel slip has been detected; # Train speed is over . As it was necessary to take the train out of service for refill following the deployment of sand, Bombardier fitted a second sand bottle, allowing two uses before the train would need to be withdrawn from service. The Virgin Trains fleet was modified between December 2008 and March 2009; the CrossCountry fleet between February and June 2011. All Class 221 units are maintained at the dedicated Central Rivers TMD near Burton-on-Trent. 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「British Rail Class 221」の詳細全文を読む スポンサード リンク
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