Hydrofoil sailing craft
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0307548
(1981-10-01)
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발명자
/ 주소 |
- Cudmore Patrick J. (Box 1243 Duxbury MA 02332)
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인용정보 |
피인용 횟수 :
7 인용 특허 :
0 |
초록
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A hydrofoil sailboat comprises forward and aft surface piercing hydrofoils and an asymmetrical wingsail. Both hydrofoils have an inverted arch configuration and have a cross-section which is approximately a circular segment. The wingsail has a reversible asymetry, is carried on a cantilevered rotata
A hydrofoil sailboat comprises forward and aft surface piercing hydrofoils and an asymmetrical wingsail. Both hydrofoils have an inverted arch configuration and have a cross-section which is approximately a circular segment. The wingsail has a reversible asymetry, is carried on a cantilevered rotatable mast and includes a sail sock that is highly tensioned between a single top frame member and a bisectional articulated bottom frame member, the asymmetry of the wingsail being defined by the relative position of the bottom frame member sections.
대표청구항
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A rudderless, bidirectionally sailable, hydrofoil sailing craft comprising: (a) substantially identical first and second, laterally extending, parallel, high aspect ratio, surface-piercing, buoyant hydrofoils, each said hydrofoil having a continuously curved inverted arch configuration, each said hy
A rudderless, bidirectionally sailable, hydrofoil sailing craft comprising: (a) substantially identical first and second, laterally extending, parallel, high aspect ratio, surface-piercing, buoyant hydrofoils, each said hydrofoil having a continuously curved inverted arch configuration, each said hydrofoil having similar streamlined longitudinal edges and a longitudinally extending cross-section which is symmetrical relative to a vertical laterally extending plane, each said hydrofoil having a zero degree angle of attack; (b) at least two laterally spaced-apart skegs extending downwardly from the convex lower surface of each said hydrofoil, each said skeg acting as a centerboard to resist sideslip; (c) means for interconnecting and supporting said first and second hydrofoils in a parallel, longitudinally aligned, vertically level relationship; (d) a mast mounted at its lower end to said interconnecting means at a location which is midway between said first and second hydrofoils and which is laterally offset to the leeward side relative to the longitudinal centerline of said sailing craft, said mast extending upwardly and laterally at an acute angle not exceeding 80°relative to the horizontal, the upper end of said mast being laterally aligned with said lower end of said mast, said mast upper end being laterally offset to the windward side relative to the longitudinal centerline of said sailing craft; and (e) an upper sail frame carried adjacent said mast upper end, an articulated lower sail frame having a relatively small leading member and a relatively large trailing member carried adjacent said mast lower end, a sail supported by said upper and lower sail frames, and control means for pivotally repositioning said sail frames about the mast axis, and for pivotally repositioning said leading and trailing lower sail frame members relative to each other about the mast axis, said sailing craft sailing equally well in both directions under the influence of hydrofoil buoyant lift at low speeds, hydrofoil upper surface hydrodynamic lift at medium speeds, hydrofoil lower surface hydroplaning lift at higher speeds, and increasing canted sail lift at increasing speeds.
이 특허를 인용한 특허 (7)
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Ott,Mark T.; Hubbard,David W., Apparatus for control of pivoting wing-type sail.
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Mitchell, Steven D., Articulated wing mechanism.
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Holemans, Walter, Autonomous sailboat for oceanographic monitoring.
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Pfeffer Thomas T. (Timberlane Dr. Pennington NJ 08534), Mainsail construction facilitating airflow thereover.
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Howard Harry ; Howard Tara Ann, Pedal-powered watercraft.
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Westerman Charles W. (24446 Peacock St. El Toro CA 92630), Rudderless sailboat.
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Fuller Robert R. (P.O. Box 383 ; 119 Tea Rock La. Marshfield MA 02050), Wing sail.
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