IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0019010
(2018-06-26)
|
| 등록번호 |
US-10252793
(2019-04-09)
|
|
발명자
/ 주소 |
|
| 출원인 / 주소 |
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| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
0 인용 특허 :
100 |
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 method of retrofitting a winglet, the winglet including a winglet leading edge and a winglet trailing edge, the method comprising: obtaining a curved blade cap, comprising: a blade cap leading edge having a first curve with a first radius;a blade cap trailing edge having a second curve with a s
1. A method of retrofitting a winglet, the winglet including a winglet leading edge and a winglet trailing edge, the method comprising: obtaining a curved blade cap, comprising: a blade cap leading edge having a first curve with a first radius;a blade cap trailing edge having a second curve with a second radius; anda distal segment oblique to the first curve and the second curve, the first curve terminating at a first end of the distal segment and the second curve terminating at a second end of the distal segment opposite the first end; andfastening the curved blade cap to the winglet, comprising: aligning the blade cap leading edge with the winglet leading edge; andaligning the blade cap trailing edge with the winglet trailing edge. 2. The method of retrofitting according to claim 1, wherein the winglet extends from a wing tip above a chord plane of a 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 method of 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 method of 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 method of 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 a length of the first curve and the second curve. 6. The method of retrofitting according to claim 1, further comprising removing a tip cap from the winglet prior to fastening the curved blade cap to the winglet. 7. The method of retrofitting according to claim 1, wherein the curved blade cap includes a first plurality of openings and the winglet includes a second plurality of openings, further comprising: aligning the first plurality of openings with the second plurality of openings; andinserting a fastener through each of the aligned first plurality of openings and second plurality of openings. 8. A method of retrofitting, comprising: obtaining a curved blade cap, comprising: a blade cap leading edge having a first curve with a first radius;a blade cap trailing edge having a second curve with a second radius; andfastening the curved blade cap to at least one of a winglet and a ventral fin, the winglet extending from a wing tip above a chord plane of a wing, the winglet comprising an upper surface and a lower surface bounded by a leading edge and a trailing edge swept toward an airstream direction,the ventral fin projecting below the chord plane from the 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, the fastening comprising: aligning the blade cap leading edge with at least one of the winglet leading edge and the ventral fin leading edge; andaligning the blade cap trailing edge with at least one of the winglet trailing edge and the ventral fin trailing edge. 9. The method of retrofitting according to claim 8, wherein the curved blade cap further comprises a distal segment oblique to the first curve and the second curve, the first curve terminating at a first end of the distal segment and the second curve terminating at a second end of the distal segment opposite the first end. 10. The method of retrofitting according to claim 8, wherein the fastening comprises fastening a first curved blade cap to the winglet, and fastening a second curved blade cap to the ventral fin. 11. The method of retrofitting according to claim 8, wherein the 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 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 winglet respectively are continuous extensions of a leading edge and a trailing edge of the wing. 12. The method of 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 method of 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 method of 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 method of 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 method of 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 method of retrofitting according to claim 16, wherein the trailing edge of the ventral fin merges into the trailing edge of the upper winglet. 18. The method of 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 method of 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. 20. The method of retrofitting according to claim 8, wherein the curved blade cap includes a first plurality of openings and the at least one of the winglet and the ventral fin includes a second plurality of openings, further comprising: aligning the first plurality of openings with the second plurality of openings; andinserting a fastener through each of the aligned first plurality of openings and second plurality of openings.
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