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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク V formation ： ウィキペディア英語版 V formation A V formation (sometimes called a skein) is the symmetric V-shaped flight formation of flights of geese, ducks, and other migratory birds. V formations also improve the fuel efficiency of aircraft and are used on military flight missions. ==Aerodynamics== The V formation greatly boosts the efficiency and range of flying birds, particularly over long migratory routes.〔(USA Today: "Why birds fly in a V-formation" by Traci Watson ) January 15, 2014〕 All the birds except the first fly in the upwash from the wingtip vortices of the bird ahead. The upwash assists each bird in supporting its own weight in flight, in the same way a glider can climb or maintain height indefinitely in rising air. In a V formation of 25 members, each bird can achieve a reduction of induced drag by up to 65% and as a result increase their range by 71%.〔 & (1970). (''Formation flight of birds''. Science 168(3934): 1003–1005 ) ((same on JSTOR ))〕 The birds flying at the tips and at the front are rotated in a timely cyclical fashion to spread flight fatigue equally among the flock members. Canada geese are a common example demonstrating the V formation. 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「V formation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.