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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0653499 (1991-02-08) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 5 인용 특허 : 0 |
A rotary airscrew having a central hub with coaxial first and second counter-rotating drive shafts, a first set of a plurality of non-lift blades connected to the first drive shaft for rotation to be rotated for moving air therewith, a second set of a plurality of primary airfoil blades connected to
A rotary airscrew comprising: (a) a central hub having coaxial first and second counter-rotating drive shafts; (b) a set of a plurality of non-lift blades connected to the first drive shaft to be rotated for moving air therewith; (c) a set of a plurality of airfoil blades connected to the second dri
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