검색연산자 | 기능 | 검색시 예 |
---|---|---|
() | 우선순위가 가장 높은 연산자 | 예1) (나노 (기계 | machine)) |
공백 | 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 | 예1) (나노 기계) 예2) 나노 장영실 |
| | 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 | 예1) (줄기세포 | 면역) 예2) 줄기세포 | 장영실 |
! | NOT 이후에 있는 검색어가 포함된 문서는 제외 | 예1) (황금 !백금) 예2) !image |
* | 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 | 예) semi* |
"" | 따옴표 내의 구문과 완전히 일치하는 문서만 검색 | 예) "Transform and Quantization" |
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) | B64C-027/22 B64C-039/12 |
미국특허분류(USC) | 244/7A ; 244/6 ; 244/22 ; 244/8 |
출원번호 | US-0068907 (1993-05-28) |
발명자 / 주소 | |
출원인 / 주소 | |
인용정보 | 피인용 횟수 : 48 인용 특허 : 0 |
A dual-mode high speed rotorcraft is disclosed which combines the efficiency of a helicopter with the high-speed capability of a fixed wing aircraft. The rotorcraft includes a rotor for propulsion during low-speed flight and hover, which is stopped and locked to function as a fixed wing during a high-speed flight. Also included are a canard and a high-lift tail, which together function to provide substantially all of the lift for the rotorcraft during the transition between low and high-speed flight, so that the rotor may be unloaded while starting and s...
An aircraft capable of both helicopter-type flight and fixed wing flight, comprising: a fuselage; a rotor/wing comprising a hub located on an upper surface of said fuselage and a plurality of rotor blades extending radially from said hub, said aircraft having a first flight regime during which said hub is rotated by at least one engine, thereby rotating said rotor blades such that they provide lift to enable the aircraft to fly vertically, hover, and fly translationally at relatively low speed, and a second flight regime during which said hub is locked t...