|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||244/007R; 244/01711; 244/039; 416/2230R|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 17 인용 특허 : 19|
A rotor blade has a local geometric twist angle .theta.=f(r/R), with R being the blade span and r being the distance along the blade span from the axis of rotation. The blade has an inner region between an (r/R)inner=0.20.+-.0.04 and a transition point at (r/R)trams=0.75.+-.0.04, wherein .theta.inner at (r/R)inner has a positive value and is greater than or equal to .theta.trans at (r/R)trans. A blade tip region includes a first portion between (r/R)trans and (r/R)min>(r/R)trans, wherein .theta. continuously decreases from .theta.trans to .theta.min at (...
1. A rotor blade including a blade root for attachment to a rotor hub for rotating said blade about an axis of rotation transverse to a blade span R between said axis of rotation and a distal end of said blade defining a blade tip, wherein said blade has a chord extending between a blade leading edge and a blade trailing edge transverse to the blade span and said chord has a local geometric twist angle .theta.=f(r/R), with r being the distance along the blade span from said axis of rotation, said blade comprising:an inner region between an inner boundary...