| 词条 | Bell 400 TwinRanger | ||||||||||||||||||
| 释义 |
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, however 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. DevelopmentBell has tried several incarnations of a twin-engine 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-bladed main rotor, and a new shrouded tail rotor.[1] Bell also planned the single-engine 400A, and the 440 twin with a larger fuselage made possible by a high degree of composites.[2] 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 profitable production rate of 120 units a year.[1] SuccessorsAfter the success of Tridair's Gemini ST twin-engine conversions of the 206L in the early 1990s, Bell produced the equivalent Bell 206LT TwinRanger based on the 206L-4. Only 13 206LTs were built between 1994 and 1997. The 206LT was replaced in Bell's lineup by the Bell 427, a mostly-new development of the Bell 407, itself a four-bladed single-engine derivative of the 206L.[1] Variants
Specifications (Bell 400){{aircraft specifications|plane or copter?= copter |jet or prop?= prop
See also{{aircontent|related=
|similar aircraft= |lists= |see also= }} References1. ^1 2 Frawley, Gerard: The International Directiory of Civil Aircraft, 2003-2004, page 43. Aerospace Publications Pty Ltd, 2003. {{ISBN|1-875671-58-7}} 2. ^1 2 {{cite book |last= Apostolo|first= Giorgio|authorlink= |author2=Elfan ap Rees|title= The Illustrated Encyclopedia of Helicopters|year= 1984|publisher= Bonanza Books|location= New York, NY, USA|isbn= 0-517-43935-2| pages = 50}} External links
5 : United States helicopters 1980–1989|United States civil utility aircraft 1980–1989|Twin-turbine helicopters|Aircraft first flown in 1984|Bell aircraft |
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