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Bell 400 TwinRanger
The Bell 400 TwinRanger was a prototype four-bladed, twin-engine civil helicopter developed by Bell Helicopter in the 1980s. Both the TwinRanger and another planned version, the Bell 440, were attempts to market a twin-engine development of the Model 206L LongRanger. The Bell 400A was a planned single-engine version of the 400. TwinRanger development was canceled when Bell could not acquire enough orders for production. The TwinRanger name was later used for a twin-engine version of the LongRanger produced from 1994 to 1997.
==Development==
Bell has tried several incarnations of a twin version of its successful Bell 206 series. The ''TwinRanger'' name dates back to the mid-1980s when Bell first considered developing a twin engine version of the LongRanger.
The ''Bell 400 TwinRanger'' featured a reprofiled fuselage, two Allison 250 turboshafts, the OH-58D Kiowa's four blade main rotor, and a new shrouded tail rotor.〔Frawley, Gerard: ''The International Directiory of Civil Aircraft, 2003-2004'', page 43. Aerospace Publications Pty Ltd, 2003. ISBN 1-875671-58-7〕 Bell also planned the single-engined ''400A'', and the ''440'' twin with a larger fuselage made possible by a high degree of composites. The Bell 400 first flew on April 4, 1984. Bell suspended development of the 400/440 family in the late 1980s as it felt unable to achieve a protifable production rate of 120 units a year.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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