MAIN ROTOR BLADE AND HELICOPTER

PROBLEM TO BE SOLVED: To provide a main rotor blade that can reduce a coefficient of resistance in high-speed forward flight of a helicopter with a main blade type or the like and can be controlled readily, and to provide a helicopter including a main rotor blade like that.SOLUTION: A main rotor bla...

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Bibliographic Details
Main Authors TANABE YASUTADA, AOYAMA TAKESHI, SUGIURA MASAHIKO, KOBIKI NOBORU
Format Patent
LanguageEnglish
Japanese
Published 22.11.2018
Subjects
AEROPLANES
AIRCRAFT
AVIATION
COSMONAUTICS
HELICOPTERS
PERFORMING OPERATIONS
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To provide a main rotor blade that can reduce a coefficient of resistance in high-speed forward flight of a helicopter with a main blade type or the like and can be controlled readily, and to provide a helicopter including a main rotor blade like that.SOLUTION: A main rotor blade 1 for a high-speed helicopter includes: a blade root part 10 with a length of 30% or more of rotor radius R; and a blade body 20 continuing to the blade root part 10. In the main rotor blade 1, the blade root part 10 preferably has a cross-sectional shape that satisfies (x/a)+(y/b)=1 and a>b, where m represents any number, x represents a chord length direction and y represents a blade thickness direction.SELECTED DRAWING: Figure 1 【課題】主翼型などのヘリコプタにおいて高速前進飛行時の抵抗係数を小さくでき、かつ、制御も容易なメインロータブレード及びそのようなメインロータブレードを有するヘリコプタを提供すること。【解決手段】メインロータブレード１は、高速ヘリコプタ用のメインロータブレード１であって、ロータ半径Ｒの３０％以上の長さの翼根部１０と、この翼根部１０に続くブレード本体２０とを有する。好ましくは、翼根部１０の断面形状は、（ｘ／ａ）ｍ＋（ｙ／ｂ）ｍ＝１、かつ、ａ＞ｂ ただし、ｍ：任意の数、ｘ：コード長方向、ｙ：翼厚方向である。【選択図】図１
Bibliography:Application Number: JP20170086872