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The Rolls-Royce T406 (company designation AE 1107C-Liberty) is a turboshaft engine that powers the Bell-Boeing V-22 Osprey tiltrotor. The Osprey is in service with the United States Marine Corps and United States Air Force. The engine delivers 6,000 shp (4,470 kW). ==Design== The T406/AE1107C Liberty shares a common core with the AE 3007 and AE 2100 series of engines. The V-22's T406 powerplants are housed in wing-tip tilting nacelles, allowing the distinctive flight characteristics of the V-22. For take off and landing the nacelles are directed vertically (90° to fuselage), while for forward flight they are rotated parallel to fuselage. The engine has been considered as a cost-effective upgrade for existing heavylift helicopters such as the CH-47 Chinook and the CH-53.〔http://www.rolls-royce.com/defence/products/transporters/ae_1107C_liberty.jsp〕 In 2009 the GAO found that the engines failed after less than 400 hours of service, as compared to the estimated life of 500–600 hours.〔("Pentagon watchdog to release classified audit on V-22 Osprey." )〕 Multiple updates to the engine platform in 2012-2013 have increased the lifespan significantly. In April 2012, the DoD ordered 70 AE 1107C engines for the Osprey, with options for up to 268 engines.〔("Rolls-Royce Awarded $598 M V-22 Engine Contract" ) ''AeroNews'', 24 April 2012. Retrieved 24 April 2012.〕 Engines with a future block 4 upgrade are expected to deliver ten thousand horsepower.〔("Rolls-Royce Boosts Power for V-22 Engines." )〕 The MT7 gas turbines that will be used to power the Ship-to-Shore Connector are a derived design of the T406.〔Benbow, Dana Hunsinger. ("Rolls-Royce to produce engines for Navy's new hovercraft fleet." ) ''Indianapolis Star'', 22 October 2012.〕 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「Rolls-Royce T406」の詳細全文を読む スポンサード リンク
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