IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0973688
(2013-08-22)
|
등록번호 |
US-8714475
(2014-05-06)
|
우선권정보 |
FR-11 51584 (2011-02-25) |
발명자
/ 주소 |
- Gall, Pierre-Emmanuel
- Gallant, Guillaume
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
7 |
초록
▼
An aircraft with reduced environmental impact includes two turboprop engines mounted on the back of the aircraft at the rear thereof, and one acoustic masking device per turboprop engine. The acoustic masking device includes a masking element, such as a flap, which can move between a position in whi
An aircraft with reduced environmental impact includes two turboprop engines mounted on the back of the aircraft at the rear thereof, and one acoustic masking device per turboprop engine. The acoustic masking device includes a masking element, such as a flap, which can move between a position in which it is retracted into the wing, and a position in which it is extended toward the rear of the wing. In the extended position, the flap intercepts the noise area generated toward the front by the turboprop engine, so as to reduce the perception of noise on the ground.
대표청구항
▼
1. Aircraft with reduced environmental impact, comprising at least one engine mounted on the back of the aircraft and generating noise forwards, and an aerofoil, the noise generated by said at least one engine being broadcast in a noise zone, characterized in that said aircraft comprises at least on
1. Aircraft with reduced environmental impact, comprising at least one engine mounted on the back of the aircraft and generating noise forwards, and an aerofoil, the noise generated by said at least one engine being broadcast in a noise zone, characterized in that said aircraft comprises at least one acoustic masking device comprising at least one masking element which is capable of moving between a retracted position and a deployed position in which said at least one masking element intercepts the noise zone so as to reduce the perception on the ground of the noise broadcast by said at least one engine, the acoustic masking element being moved aft in its deployed position so as to increase the chord at the root of the aerofoil. 2. Aircraft according to claim 1, characterized in that the masking element is in a retracted position in the cruising phase and in a deployed position in the take-off, landing and/or approach phase. 3. Aircraft according to claim 1, characterized in that it comprises moreover a fuselage provided with an aerofoil comprising two symmetrical wings, said at least one engine being mounted at the rear of the aircraft between said wings and the rear end of the aircraft. 4. Aircraft according to claim 1, characterized in that the aircraft comprises moreover a fuselage provided with an aerofoil comprising two symmetrical wings and at least one horizontal aft tail unit, said at least one engine being mounted at the rear of the aircraft between said wings and said horizontal tail unit, an acoustic masking device being associated with each of the wings, said at least one masking element of each device being capable of moving between a retracted position and a deployed position so as to increase the chord at the root of each of the wings. 5. Aircraft according to claim 1, characterized in that said at least one device comprises means of moving said at least one masking element. 6. Aircraft according to claim 1, characterized in that said at least one masking element of said at least one device is composed of at least one flap. 7. Aircraft according to claim 6, characterized in that said at least one masking element comprises a main flap and at least one secondary flap. 8. Aircraft according to claim 7, characterized in that the main flap is rigid and said at least one secondary flap is made of a flexible fabric. 9. Aircraft according to claim 8, characterized in that said at least one acoustic masking device comprises a rolling/unrolling system making it possible to roll and unroll the flexible fabric. 10. Aircraft according to claim 1, characterized in that said at least one acoustic masking device comprises a system of traveler(s) and track(s) serving to guide the movement of the traveler when said at least one masking element is moved. 11. Aircraft according to claim 10, characterized in that it comprises moreover at least one fairing linked to the aerofoil, the system of traveler(s) and track(s) comprising two tracks housed respectively in the fuselage and in said at least one fairing. 12. Aircraft according to claim 10, characterized in that it comprises moreover two fairings linked to the aerofoil, a central undercarriage and two auxiliary undercarriages of the shock-compensating rocker beam type, respectively housed in the two fairings. 13. Aircraft according to claim 11, characterized in that the fairing(s) are fairings known as “Küchemann” fairings, situated substantially in the middle of each of the wings of the aerofoil. 14. Aircraft according to claim 5, characterized in that the movement means of said at least one masking element comprise a deformable parallelogram. 15. Aircraft according to claim 14, characterized in that the deformable parallelogram comprises at least one torsion bar, at least one guide arm and at least one movement rod, the movement of said parallelogram being ensured by the rotation of said torsion bar. 16. Aircraft according to claim 3, characterized in that said wings have a small sweep and a high aspect-ratio so as to reduce the fuel consumption. 17. Aircraft according to claim 1, characterized in that it comprises, at the front of the fuselage, an aerofoil surface called a noseplane.
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