IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0090541
(2016-04-04)
|
등록번호 |
US-10005546
(2018-06-26)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
65 |
초록
▼
A split winglet configured for attachment to a wing tip of a wing. The split winglet may include an upper winglet extending from the wing tip above a chord plane of the wing and a ventral fin projecting below the chord plane. The upper winglet and the ventral fin may include tip configurations. At l
A split winglet configured for attachment to a wing tip of a wing. The split winglet may include an upper winglet extending from the wing tip above a chord plane of the wing and a ventral fin projecting below the chord plane. The upper winglet and the ventral fin may include tip configurations. At least one of the upper winglet tip configuration and the ventral fin tip configuration may be provided by a curved blade cap attached thereto. The curved blade cap may include a leading edge having a first curve with a first radius, and a trailing edge having a second curve with a second radius different from the first radius. The curved blade cap may also include a distal segment oblique to the first curve and the second curve.
대표청구항
▼
1. A retrofitting for a winglet attached to a wing tip of a wing, the winglet including a winglet leading edge and a winglet trailing edge, comprising: a curved blade cap designed for attachment to the winglet, the curved blade cap comprising: a blade cap leading edge having a first curve with a fir
1. A retrofitting for a winglet attached to a wing tip of a wing, the winglet including a winglet leading edge and a winglet trailing edge, comprising: a curved blade cap designed for attachment to the winglet, the curved blade cap comprising: a blade cap leading edge having a first curve with a first radius, the blade cap leading edge designed for alignment with the winglet leading edge;a blade cap trailing edge having a second curve with a second radius, the blade cap trailing edge designed for alignment with the winglet trailing edge; anda distal segment oblique to the first curve and the second curve, wherein the first curve terminates at a first end of the distal segment and the second curve terminates at a second end of the distal segment opposite the first end. 2. The retrofitting according to claim 1, wherein the winglet extends from the wing tip above a chord plane of the wing, the winglet comprising an upper surface and a lower surface bounded by the winglet leading edge and the winglet trailing edge swept toward an airstream direction substantially parallel with a root chord. 3. The retrofitting according to claim 1, wherein at least one of the first curve and the second curve is a compound curve comprising at least a first curve portion having a first radius and a second curve portion having a second radius. 4. The retrofitting according to claim 1, wherein at least one of the first curve and the second curve comprises a radius of curvature that continuously changes as a function of a length of the respective curve. 5. The retrofitting according to claim 4, wherein both the first curve and the second curve comprise a radius of curvature that continuously changes as a function of the length of the first curve and the second curve. 6. The retrofitting according to claim 1, wherein the winglet includes a tip cap, and wherein the curved blade cap is designed to replace the tip cap. 7. The retrofitting according to claim 6, wherein the curved blade cap includes a first plurality of openings positioned to align with a second plurality of openings in the winglet, and wherein the first and second plurality of openings are configured to receive a plurality of fasteners to attach the curved blade cap to the winglet. 8. A retrofitting, comprising: a curved blade cap providing at least one of a winglet tip configuration and a ventral fin tip configuration,the winglet tip configuration included on an upper winglet extending from a wing tip above a chord plane of a wing, the upper winglet comprising an upper surface and a lower surface bounded by a leading edge and a trailing edge swept toward an airstream direction and converging at the winglet tip configuration,the ventral fin tip configuration included on a ventral fin projecting below the chord plane from the upper winglet, the ventral fin comprising an upper surface and a lower surface bounded by a leading edge and a trailing edge swept toward the airstream direction and converging at the ventral fin tip configuration. 9. The retrofitting according to claim 8, wherein the curved blade cap is provided as both the winglet tip configuration and the ventral fin tip configuration. 10. The retrofitting according to claim 8, wherein the curved blade cap comprises: a leading edge having a first curve with a first radius;a trailing edge having a second curve with a second radius; anda distal segment oblique to the first curve and the second curve, wherein the first curve terminates at a first end of the distal segment and the second curve terminates at a second end of the distal segment opposite the first end. 11. The retrofitting according to claim 8, wherein the upper winglet further comprises a transition section which curves upward from the wing tip into a substantially planar section, wherein the upper surface and the lower surface of the upper winglet respectively are continuous extensions of an upper surface and a lower surface of the wing tip, and wherein the leading edge and the trailing edge of the upper winglet respectively are continuous extensions of a leading edge and a trailing edge of the wing. 12. The retrofitting according to claim 11, wherein the transition section comprises a substantially constant radius of curvature between the wing tip and the substantially planar section. 13. The retrofitting according to claim 11, wherein the transition section comprises at least a first portion having a first radius and a second portion having a second radius disposed along a length of the transition section between the wing tip and the substantially planar section. 14. The retrofitting according to claim 11, wherein the transition section comprises a curvature that continuously changes as a function of a length of the transition section between the wing tip and the substantially planar section. 15. The retrofitting according to claim 11, wherein the ventral fin projects from a lower surface of the transition section and extends below the chord plane. 16. The retrofitting according to claim 11, wherein the ventral fin merges into the lower surface of the upper winglet distal of the leading edge of the upper winglet. 17. The retrofitting according to claim 16, wherein the trailing edge of the ventral fin merges into the trailing edge of the upper winglet. 18. The retrofitting according to claim 11, wherein the leading edge of the upper winglet and the leading edge of the ventral fin merge together at the transition section, wherein the leading edge of the upper winglet and the leading edge of the ventral fin are continuous extensions of the leading edge of the wing. 19. The retrofitting according to claim 11, wherein the trailing edge of the upper winglet and the trailing edge of the ventral fin merge together at the transition section, wherein the trailing edge of the upper winglet and the trailing edge of the ventral fin are continuous extensions of the trailing edge of the wing.
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