IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0452424
(2014-08-05)
|
등록번호 |
US-9302766
(2016-04-05)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
64 |
초록
▼
A split winglet configured for attachment to a wing of an airplane. The split winglet may include an upper winglet smoothly extending from the wing tip above a chord plane of the wing and a ventral fin projecting below the chord plane from a lower surface of the upper winglet. The upper winglet may
A split winglet configured for attachment to a wing of an airplane. The split winglet may include an upper winglet smoothly extending from the wing tip above a chord plane of the wing and a ventral fin projecting below the chord plane from a lower surface of the upper winglet. The upper winglet may include a transition section which curves upward from the wing tip into a substantially planar section. Upper and lower surfaces of the upper winglet may be bounded by leading and trailing edges which are swept toward an airstream direction, parallel with the chord plane, and curve toward the airstream direction before terminating at a point distal of the wing tip. Similarly, upper and lower surfaces of the ventral fin may be bounded by leading and trailing edges which curve toward the airstream direction and terminate at a point distal of the wing tip.
대표청구항
▼
1. A split winglet configured for attachment to a wing tip of a wing, comprising: an upper winglet extending from the wing tip above a chord plane of the wing, the upper winglet comprising an upper surface and a lower surface bounded by a leading edge and a trailing edge, the leading edge and the tr
1. A split winglet configured for attachment to a wing tip of a wing, comprising: an upper winglet extending from the wing tip above a chord plane of the wing, the upper winglet comprising an upper surface and a lower surface bounded by a leading edge and a trailing edge, the leading edge and the trailing edge comprising substantially linear sections which are swept toward an airstream direction and then converging to an upper winglet tip configuration comprising a curving of the leading edge and the trailing edge toward the airstream direction to substantially a point distal of the wing tip, the airstream direction being substantially parallel with a root chord; anda ventral fin projecting from the lower surface of the upper winglet, the ventral fin comprising an upper surface and a lower surface bounded by a leading edge and a trailing edge extending below the chord plane, the leading edge and the trailing edge comprising substantially linear sections which are swept toward the airstream direction and then converge to a ventral fin tip configuration comprising a curving of the leading edge and the trailing edge toward the airstream direction to substantially a point distal of the wing tip of the airplane;wherein the upper surface and the lower surface of the upper winglet respectively merge with an upper surface and a lower surface of the wing. 2. The split winglet of claim 1, wherein the curving of the upper winglet tip configuration comprises a curve of the leading edge having a first radius and a curve of the trailing edge having a second radius, wherein the first radius and the second radius orient the leading and trailing edges toward the airstream direction so as to converge to substantially the point distal of the wing tip of the wing. 3. The split winglet of claim 1, wherein the upper winglet further comprises a transition section which curves upward from the wing tip into a substantially planar section, such that the upper surface and the lower surface of the upper winglet respectively are smooth extensions of the upper and lower surfaces of the wing tip, and such that the leading and trailing edges of the upper winglet respectively are continuous extensions of a leading edge and a trailing edge of the wing. 4. The split winglet of claim 3, wherein the transition section comprises a substantially constant radius of curvature between the wing tip and the planar section. 5. The split winglet of claim 3, wherein the transition section comprises one or more radii of curvature disposed along a length of the transition section between the wing tip and the planar section. 6. The split winglet of claim 3, wherein the transition section comprises a substantially nonlinear curvature along a length of the transition section between the wing tip and the planar section. 7. The split winglet of claim 3, wherein the ventral fin projects from a lower surface of the transition section and extends below the chord plane. 8. The split winglet of claim 7, wherein the leading edge of the ventral fin merges into the lower surface of the upper winglet distal of the leading edge of the upper winglet. 9. The split winglet of claim 8, wherein the trailing edge of the ventral fin merges into the trailing edge of the upper winglet. 10. The split winglet of claim 3, wherein the leading edge of the upper winglet and the leading edge of the ventral fin merge together at the transition section, such that 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. 11. The split winglet of claim 3, wherein the trailing edge of the upper winglet and the trailing edge of the ventral fin merge together at the transition section, such that 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. 12. The split winglet of claim 1, wherein the upper winglet tip configuration comprises a curved blade cap which is removably attached to the upper winglet by way of a multiplicity of fasteners, the curved blade cap comprising a leading edge having a first curve and a trailing edge having a second curve, both of which curves terminating at a distal segment, wherein the leading and trailing edges form respective curved extensions of the leading and trailing edges of the upper winglet. 13. The split winglet of claim 1, wherein the ventral fin tip configuration comprises a curved blade cap which is removably attached to the ventral fin by way of a multiplicity of fasteners, the curved blade cap comprising a leading edge having a first curve and a trailing edge having a second curve, both of which curves terminating at a distal segment, wherein the leading and trailing edges form respective curved extensions of the leading and trailing edges of the ventral fin. 14. A wing tip of an airplane, comprising: an upper winglet extending from the 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, the leading edge and the trailing edge being swept toward an airstream direction and converging at an upper tip configuration comprising a curving of the upper winglet toward the airstream direction, such that the upper tip configuration resembles a blade curved into the airstream direction; anda 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, the leading edge and the trailing edge being swept toward the airstream direction and converging at a ventral fin tip configuration comprising a curving of the ventral fin toward the airstream direction, such that the ventral fin tip configuration resembles a blade curved into the airstream direction. 15. The wing tip of claim 14, wherein the upper surface and the lower surface are smooth extensions of an upper surface and a lower surface of the wing. 16. The wing tip of claim 14, wherein the upper winglet further comprises a curved transition section extending from the wing to a substantially planar section converging at the upper tip configuration, and wherein the ventral fin projects below the chord plane from substantially a midpoint of the curved transition section.
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