IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0259357
(1988-10-17)
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발명자
/ 주소 |
- Elmali Nuri E. (2532½49th St. St. Petersburg FL 33707) Elmali Martha T. (2532½49th St. St. Petersburg FL 33707)
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인용정보 |
피인용 횟수 :
9 인용 특허 :
5 |
초록
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The invention is a soft wing sail consisting of membrane covering its both sides, between which a set of batten assemblies placed at vertical intervals, each extending from luff to leech, enabling the airfoil to retain a pre-engineered, variable and reversible asymmetrical working chordal profile. T
The invention is a soft wing sail consisting of membrane covering its both sides, between which a set of batten assemblies placed at vertical intervals, each extending from luff to leech, enabling the airfoil to retain a pre-engineered, variable and reversible asymmetrical working chordal profile. The batten assemblies include a draft member assembly composed of draft members of lengths varying in conformance to the pre-engineered chordal curvatures of the airfoil, batten channels and a luff member assembly. The interrelation and interaction of these components are such that when the airfoil is loaded from one side, the surface pressure transforms the chordal curvature of the windward side to its pre-designed shape, whereas the windward side transmits the loads to the leeward side to help transform it into a shape featuring a curvature pre-designed for the leeward surface, hence creating an asymmetrical chordal profile with different chordal curvatures on both sides. Upon tacking the airfoil, the previous load status and hence the geometrical status of the airfoil reverses. Owing to the vertical intervals in between the batten assemblies, the airfoil can be reefed in the manner of slab reefing, for which a novel method of reef typing is introduced, intending to provide further convenience in reef handling.
대표청구항
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A flexible airfoil assembly functioning as a wing sail, said airfoil comprising: (a) membrane sheets covering its sides to constitute flexible fairing surfaces so cut to feature sail twist; (b) means for receiving attachment members connecting the said airfoil to a hoisting means, mounted at the hea
A flexible airfoil assembly functioning as a wing sail, said airfoil comprising: (a) membrane sheets covering its sides to constitute flexible fairing surfaces so cut to feature sail twist; (b) means for receiving attachment members connecting the said airfoil to a hoisting means, mounted at the head of the said airfoil; (c) means for reefing the said airfoil; (d) a boom running along the foot of the said airfoil, to which the said airfoil is adjustably attached. (e) a plurality of batten assemblies constituting a variable spatial relationship between the said fairing surfaces, between which they are placed at vertical intervals along the span, extending from luff to leech wherein each said batten assembly is capable of attaining an asymmetrical chordal shape featuring a variable and reversible camber line achieved by the function of laterally movable and flexible members transmitting loads between the said fairing surfaces, creating different fairing curvatures on each side, wherein the said action of assuming, reversing and varying the chordal shape is achieved as a response to the higher surface pressure on the windward fairing surface at any tack and any attitude therein during operation, wherein said batten assemblies are capable of oscillating when said airfoil is luffed; (f) a set of draft members at each batten assembly, placed transversally with respect to the camber line on the chordal plane forming a draft member assembly, and of which lengths vary congruously conforming to the pre-engineered chordal drafts corresponding to the location of each said member along the camber line, whereas said draft members are movably related to each other in such a manner that said draft members can be displaced against each other transversally, wherein the distance of each said member from the point of its intersection with the camber line to the chordal length varies, but the curvilinear distance from the same point to luff remains constant along the camber line; (g) flexible batten channels placed in between each draft member assembly and the inside face of the fairing surfaces on both sides, whereas each batten channel features a longitudinal receptacle along its length, of which function is to receive the endpoints of said draft members, while the said batten channels are capable of flexing in conformance to the curvature determined by the variable loci of the endpoints of the said draft members, whereby upon which said batten channels, said fairing surfaces are removably attached; (h) means to terminate the said draft members at their endpoints which allows the said draft members to be movably received by, and to travel longitudinally along the length of the said receptacle of the batten channels, and also to allow pivotal movement around the said endpoints; (i) means to terminate the draft assembly at the luff, where the said batten channels and the draft member assembly are attached to their respective members which in turn are concentrically and rotatably assembled around a center element featuring an opening to serve as a receptacle means to receive means to relate the airfoil to a support system, wherein the total interaction of the said constituent members of the said batten assembly allows any one of the fairing surfaces upon which a higher surface pressure is built up, to push the said batten channels of its respective side to leeward, forcing them to conform to its acquired curvature in response to the said surface pressure, and hence cause the said batten channels to push the said draft members laterally with respect to the camber line and towards the leeward side, and in turn forcing the leeward batten member and the leeward fairing surface to conform to the curvature created by the locus of the leeward tips of the draft members.
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