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Krueger flap apparatus and methods incorporating a bullnose having a contour variation along a spanwise direction
US2018370614A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018370614-A1 |
| Application number | US-201715629542-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 21, 2017 |
| Priority date | Jun 21, 2017 |
| Publication date | Dec 27, 2018 |
| Grant date | — |
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Abstract
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Krueger flap apparatus and methods incorporating a bullnose having a contour variation along a spanwise direction are described. An example apparatus includes a Krueger flap having a bullnose extending in a spanwise direction. The bullnose includes a contour variation formed by a plurality of protuberances located along the bullnose. Respective ones of the protuberances are spaced along the spanwise direction.
First claim
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What is claimed is: 1 . An apparatus, comprising: a Krueger flap having a bullnose extending in a spanwise direction, the bullnose including a contour variation formed by a plurality of protuberances located along the bullnose, respective ones of the protuberances being spaced along the spanwise direction. 2 . The apparatus of claim 1 , wherein the protuberances are uniformly shaped. 3 . The apparatus of claim 1 , wherein the protuberances are uniformly spaced in the spanwise direction along the bullnose. 4 . The apparatus of claim 1 , wherein the contour variation has an undulating profile. 5 . The apparatus of claim 1 , wherein the contour variation extends fully across the bullnose in the spanwise direction. 6 . The apparatus of claim 1 , wherein the contour variation is to increase a lift to drag ratio associated with the Krueger flap. 7 . The apparatus of claim 1 , wherein the Krueger flap is to be coupled to an airfoil, the Krueger flap to be movable relative to the airfoil between a stowed position and a deployed position. 8 . The apparatus of claim 7 , wherein the contour variation of the bullnose is to be exposed to an airflow when the Krueger flap is in the deployed position, and wherein the contour variation of the bullnose is to be hidden from the airflow when the Krueger flap is in the stowed position. 9 . The apparatus of claim 7 , wherein the airfoil includes a leading edge, the contour variation of the bullnose to be located forward of the leading edge when the Krueger flap is in the deployed position, the contour variation of the bullnose to be located aft of the leading edge when the Krueger flap is in the stowed position. 10 . An apparatus, comprising: an airfoil having a spanwise direction; and a Krueger flap coupled to the airfoil and having a bullnose extending in the spanwise direction, the bullnose including a contour variation formed by a plurality of protuberances located along the bullnose, respective ones of the protuberances being spaced along the spanwise direction, the Krueger flap being movable relative to the airfoil between a stowed position and a deployed position. 11 . The apparatus of claim 10 , wherein the contour variation of the bullnose is to be exposed to an airflow when the Krueger flap is in the deployed position, and wherein the contour variation of the bullnose is to be hidden from the airflow when the Krueger flap is in the stowed position. 12 . The apparatus of claim 10 , wherein the airfoil includes a leading edge, the contour variation of the bullnose to be located forward of the leading edge when the Krueger flap is in the deployed position, the contour variation of the bullnose to be located aft of the leading edge when the Krueger flap is in the stowed position. 13 . The apparatus of claim 10 , wherein the protuberances are uniformly shaped. 14 . The apparatus of claim 10 , wherein the protuberances are uniformly spaced in the spanwise direction along the bullnose. 15 . The apparatus of claim 10 , wherein the contour variation has an undulating profile. 16 . The apparatus of claim 10 , wherein the contour variation extends fully across the bullnose in the spanwise direction. 17 . The apparatus of claim 10 , wherein the contour variation is to increase a lift to drag ratio associated with the Krueger flap. 18 . A method, comprising: moving a Krueger flap relative to an airfoil between a stowed position and a deployed position, the airfoil having a spanwise direction, the Krueger flap being coupled to the airfoil and having a bullnose extending in the spanwise direction, the bullnose including a contour variation formed by a plurality of protuberances located along the bullnose, respective ones of the protuberances being spaced along the spanwise direction. 19 . The method of claim 18 , wherein the contour variation of the bullnose is to be exposed to an airflow when the Krueger flap is in the deployed position, and wherein the contour variation of the bullnose is to be hidden from the airflow when the Krueger flap is in the stowed position. 20 . The method of claim 18 , wherein the airfoil includes a leading edge, the contour variation of the bullnose being located forward of the leading edge when the Krueger flap is in the deployed position, the contour variation of the bullnose being located aft of the leading edge when the Krueger flap is in the stowed position.
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- What does patent US2018370614A1 cover?
- Krueger flap apparatus and methods incorporating a bullnose having a contour variation along a spanwise direction are described. An example apparatus includes a Krueger flap having a bullnose extending in a spanwise direction. The bullnose includes a contour variation formed by a plurality of protuberances located along the bullnose. Respective ones of the protuberances are spaced along the spa…
- Who is the assignee on this patent?
- Boeing Co
- What technology area does this patent fall under?
- Primary CPC classification B64C9/24. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Dec 27 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).