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The C Stock,consisting of C69 and C77 stock, was a class of rolling stock used on London Underground's Circle, Hammersmith & City and District line between 28 September 1970 and 29 June 2014. The class was maintained at Hammersmith Depot. The fleet's lifespan was just under 44 years. The C stock were replaced by S7 Stock between January 2013 and June 2014. A farewell tour for the stock took place 29 June 2014. ==Construction== In 1968 C69 stock 6-car trains were ordered from Metropolitan–Cammell of Birmingham to replace O/P Stock on the London Underground's Circle and Hammersmith & City lines for delivery from 1969, but trials of a four-car unit were delayed until summer 1970. The first entered service on 28 September 1970. The C69 stock was constructed using the then standard practice of a load bearing aluminium underframe with non load bearing body of riveted panels on aluminium framing. The high density nature of the Circle line service meant that loading times were important. Consequently, all cars were fitted with 4 double sets of air operated sliding doors per side. Seating was mainly transverse and total capacity was 32 per car. The 106 DM cars (Nos 5501-5606) were each coupled to one of 106 T (Nos 6501-6606) forming semi permanent two car units with automatic coupler at each end. Three such units were then marshalled as six car trains for normal service. The DM cars were slightly longer to accommodate the drivers cabs, the saloon dimensions in all other respects being the same. To replace the CO/CP stock on the Edgware Road to Wimbledon section of the District line, a further eleven trains designated C77 were ordered of identical layout. The 33 DM (Nos 5701-5733) and T (Nos 6701-6733) were also formed as 2 car units and could and did interrun with C69. The first was delivered in July 1977.〔 Equipment as built included load sensing "Metacone" air suspension, rheostatic braking, hydraulic parking brake, pneumatic camshaft control by GEC and Brush DC motors of type LT117, with each Dm car having four motors . Air supply was by Reavell reciprocating compressors and braking equipment was by Westinghouse. Guards door controls were in the driver's cab and this eased conversion to one man operation in 1983-4, the first LU line to do so. A car was added to the C77 order to replace C69 car 5585, damaged in the West Ham IRA bomb attack in March 1976. Unit 5585-6585 became a hybrid C69/C77 unit and was selected for a trial refurbishment in 1989 at BREL, Derby.〔 Unit 5606-6606, which had been used for various equipment trials, were scrapped in December 1994. Cars 6505 and 6713 were damaged in the 7 July 2005 bombings and were scrapped above the solebar. The remains were used in the building of new cars 6606 (the second car with this number) and 6734 as C08 stock. They were paired with 5505 and 5713, renumbered 5606 and 5734 to match their partners. 5548+6548 were rebuilt in part following the bombings. 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「London Underground C69 and C77 Stock」の詳細全文を読む スポンサード リンク
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