EP3521154A1 - Hydrofoil - Google Patents

Hydrofoil Download PDF

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Publication number
EP3521154A1
EP3521154A1 EP19152352.1A EP19152352A EP3521154A1 EP 3521154 A1 EP3521154 A1 EP 3521154A1 EP 19152352 A EP19152352 A EP 19152352A EP 3521154 A1 EP3521154 A1 EP 3521154A1
Authority
EP
European Patent Office
Prior art keywords
wing
hydrofoil
tubular portion
section
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19152352.1A
Other languages
English (en)
French (fr)
Inventor
Cornelius Geislinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ellergon Antriebstechnik GmbH
Original Assignee
Ellergon Antriebstechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ellergon Antriebstechnik GmbH filed Critical Ellergon Antriebstechnik GmbH
Publication of EP3521154A1 publication Critical patent/EP3521154A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/24—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type
    • B63B1/248—Shape, hydrodynamic features, construction of the foil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/24—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type
    • B63B1/246—Arrangements of propulsion elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/24—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type
    • B63B1/26—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type having more than one hydrofoil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/10—Motor-propelled water sports boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
    • B63B32/64—Adjustable, e.g. by adding sections, by removing sections or by changing orientation or profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
    • B63B32/66—Arrangements for fixation to the board, e.g. fin boxes or foil boxes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
    • B63H21/213—Levers or the like for controlling the engine or the transmission, e.g. single hand control levers

Definitions

  • the invention relates to a hydrofoil comprising a mast, a front wing and a rear wing, which are arranged, based on a forward travel direction, one behind the other at a free end portion of the mast.
  • the invention also relates to a board, which is equipped with such a hydrofoil.
  • Hydrofoils make it possible to lift a board out of the water when travelling, for example, when kite surfing or jet skiing, in order to thereby reduce the flow resistance.
  • the hydrofoil generally includes a mast on which at least one wing is mounted. The mast is also attached to the board. In travel mode, only a portion of the mast and of the wing or wings remains submerged in the water.
  • One example of such a hydrofoil board is found in EP 2 907 737 B2 .
  • the object of the invention is to improve the travel stability of a hydrofoil board in order, for example, to make it easier for beginners in learning to travel with such a board.
  • the hydrofoil according to the invention comprises a mast having a first end portion and a second end portion, a front wing and a rear wing intended for generating lift and arranged at the second end portion of the mast, the front wing being designed as a mono-plane wing, and the rear wing being arranged behind the front wing (5) in the flow direction based on a forward travel direction, wherein the rear wing (6) is designed as an annular wing and additionally has at least one tubular portion which is oriented toward the forward travel direction in such a way that water can flow through said portion counter to the forward travel direction.
  • the tubular design also results in lower induced resistance, i.e., in a reduction of flow losses.
  • the hydrofoil according to the invention is further distinguished by a high robustness and lower ventilation compared to a hydrofoil that has a conventional rear wing.
  • the annular wing may, for example, have precisely one tubular portion, the longitudinal axis of which is oriented in the forward travel direction.
  • the annular wing has two tubular portions arranged in parallel to one another.
  • tubular portions extending in parallel to one another may directly adjoin one another in a twin configuration or else may be mutually spaced apart transversely with respect to the forward travel direction and may be interconnected by a bridge.
  • the at least one tubular portion has a constant through-flow cross section throughout. It is also possible, however, to design merely one region with a constant through-flow cross section.
  • the tubular portion in the form of a nozzle or of a diffusor depending on the need.
  • the at least one tubular portion may have a through-flow cross section that narrows or widens in the through-flow direction or else at least one region that has a through-flow cross section that narrows or widens in the through-flow direction.
  • the at least one tubular portion in the through-flow cross section thereof and/or upstream of said cross section has one or more struts that extend transversely with respect to the through-flow direction.
  • the struts may optionally also be used to influence the flow passage through the tubular portion.
  • a connection to the rear wing may also be achieved by way of the struts.
  • the annular wing and the front wing are interconnected by means of a connecting rod, which is in turn connected to the mast, the annular wing and the front wing being preferably spaced apart from the mast.
  • the attachment of the wing to the mast is facilitated by the connecting rod.
  • the connecting rod in this case may either be permanently installed on the mast or else may be attached as a detachable component to the mast, so that if required, connecting rods of varying lengths may be used.
  • the connecting rod based on the vertical direction of the hydrofoil, may be level with the through-flow cross section of the at least one tubular portion.
  • the at least one tubular portion forms an inlet edge, which extends in a plane perpendicular to the inflow.
  • the at least one tubular portion may form an inlet edge, which extends in a plane that is inclined with respect to the inflow at an angle of more than 0° up to a maximum of 20°.
  • the tubular portion is preferably designed as a closed profile in the circumferential direction. It is also possible, however, to design the at least one tubular portion with a continuous longitudinal slot in the through-flow direction.
  • one or more outwardly projecting outer wings may be arranged on the outer circumference of the at least one tubular portion.
  • a board is also proposed, which is equipped with a hydrofoil of the type explained above.
  • Figure 1 shows a board 2 an example of a watercraft suitable for kite surfing or jet skiing, to which a hydrofoil 1 is attached. It is possible, however, to also use corresponding hydrofoils 1 on boats, for example.
  • the hydrofoil 1 has a mast 3, a connecting rod 4, a front wing 5 and a rear wing 6. These components are designed as separate parts and interconnected in such a way that they can be replaced individually. In this way, it is possible to flexibly adapt the hydrofoil 1 to various intended purposes.
  • the hydrofoil 1 can be very compactly folded for transporting. It is also possible, however, to integrate two or more components into one single part.
  • the mast 3 has a first end portion 7 for attachment to the board 2, as well as a second end portion 9 for connecting the connecting rod 4.
  • the mast 3 has a height in the range of 700 to 1200 mm in the vertical direction z, a length in the range of 80 to 150 mm in the longitudinal direction or forward travel direction x, and a thickness in the range of 10 to 30 mm in the transverse direction y.
  • the mast 3 is fabricated preferably from a composite fiber plastic, such as carbon fiber-reinforced plastic (CFK) or glass fiber-reinforced plastic (GFK). However, it may also be manufactured from an aluminum alloy or from a multilayer composite material.
  • CFRK carbon fiber-reinforced plastic
  • GFK glass fiber-reinforced plastic
  • the first end portion 7 of the mast 3 may form a flange-like attachment portion 8, which is widened with respect to its remaining cross section and which provides a bearing surface for the underside of the board 2.
  • a second end portion 9 at the free end of the mast 3 has a holding means for the connecting rod 4, for example, in the form of a through-opening, in which the connecting rod 4 is held.
  • the holding means may alternatively also be designed as a recess open on a longitudinal side, in particular, a groove, in which the connecting rod 4 is secured.
  • the front wing 5 and the rear wing 6 are attached to the mast 3 via the connecting rod 4.
  • the mast 3 is braced via the connecting rod 4 against forces occurring on the wings 5 and 6 during travel.
  • the connecting rod 4 is secured on the mast 3 against a rotation about its longitudinal axis. This may be achieved, for example, by a corresponding profiling of the connecting rod 4 and the holding means on the mast 3 and/or with the aid of a suitable attachment means, as is explained in greater detail in EP 2 907 737 A1 .
  • the connecting rod 4 is fabricated from metal, preferably from a steel, titanium or aluminum alloy. It has a slim diameter in the range of 10 to 25 mm, as a result of which the flow resistance in the water remains minimal.
  • the length of the connecting rod 4 is preferably in the range of 400 to 1000 mm.
  • the connecting rod 4 may be designed with a constant diameter. However, it is also possible for merely portions, for example, the region that is guided in the holding means, to be designed with a constant cross section.
  • the front wing 5 and the rear wing 6 are arranged one behind the other in the travel direction and attached to a front and rear end 10, 11 of the connecting rod 4.
  • the front wing 5 is seated, in particular, at the front end 10 and the rear wing 6 is seated at the rear end 11 of the connecting rod 4, so that based on the forward travel direction, the front wing 5 is in front of the mast 3 and the rear wing 6 is behind the mast 3.
  • the front wing 5 and the rear wing 6 in this configuration are preferably spaced apart from the mast 3.
  • Both the attachment of the connecting rod 4 to the mast 3, as well as the attachment of the wings 5 and 6 to the connecting rod may be detachably designed.
  • connecting rods 4 of different lengths may be attached to the mast 3 in order to change the position of the wings 5 and 6.
  • different front and rear wings 5 and 6 may be attached to the connecting rod 4,
  • the wings 5 and 6 are preferably manufactured from fiber composite plastic, in particular, carbon fiber-reinforced plastic (CFK) or glass fiber-reinforced plastic (GFK), or from a multilayer composite plastic.
  • CFRK carbon fiber-reinforced plastic
  • GFK glass fiber-reinforced plastic
  • the rear wing 6 is designed as an annular wing, whereas the front wing 5 is configured as a mono-plane or one deck wing panel.
  • An annular wing in the present case is understood to be a wing that has at least one tubular portion 12, which is oriented toward the forward travel direction x in such a way that water is able to flow through said wing counter to the forward travel direction. Its inner cross section is substantially unobstructed.
  • annular wing enables an improved stabilization about the vertical axis z, so that a more stable travel performance occurs, which is, in particular, essentially also independent of the angle of inclination.
  • the annular wing is further distinguished by a greater robustness, i.e. greater mechanical stability.
  • the tubular portion 12 preferably has a minimum through-flow diameter of at least 7 cm 2 and further preferred of at least 12.5 cm 2 .
  • annular rear wing 6 of the hydrofoil 1 according to Figure 1 is depicted in greater detail in Figure 2 .
  • Said annular wing has precisely one tubular portion 12, the longitudinal axis A of which is oriented in the forward travel direction x.
  • the tubular portion 12 has a constant through-flow cross section throughout. In the present case, it is designed as a simple hollow tube having a circular cylindrical cross section.
  • struts 13 Apparent within the through-flow cross section of the tubular portion 12 are two struts 13, which extend transversely with respect to the through-flow direction x and are arranged here merely by way of example in a cross-shaped cross-sectional profile.
  • the tubular portion is reinforced on the inside by the struts 13.
  • the connection of the annular wing to the connecting rod 4 may made via the struts 13.
  • the tubular portion 12 is arranged in such a way that the connecting rod 4 points in the direction of the through-flow cross section of the tubular portion 12.
  • the connecting rod 4 is at the level of the through-flow cross section.
  • Figure 2 depicts merely one possible embodiment of an annular rear wing 6. Numerous modifications of the annular wing are possible, which are to be explained in greater detail below with reference to the Figures 3 through 5 .
  • the longitudinal extension of the struts 13 in the longitudinal direction x may be designed differently than depicted, for example, limited solely to the flow inlet side of the tubular portion 12 or optionally positioned axially upstream of the latter, as is indicated, for example, in Figure 4 .
  • FIG. 3 Examples a through f of possible modifications of the cross section of the annular wing in the yz-plane are depicted in Figure 3 .
  • Variant a in this case corresponds to the previously explained tubular portion 12 of the Figures 1 and 2 , which has an annular through-flow cross section.
  • annular profile instead of an annular profile, other hollow profile shapes such as, for example, an elliptical cross section in variant b or the like (cf. variant e) may also be used.
  • the two tubular portions 12 are depicted in Figure 3d next to one another in the twin configuration in the vertical direction. However, it is also possible to use such a twin configuration with tubular portions 12 situated one on top of the other in the vertical direction.
  • one or multiple outwardly projecting outer wings 15 may be arranged on the outer circumference 18 of the at least one tubular portion 12, as is depicted by way of example for variant c.
  • Corresponding outer wings 15 may, however, optionally also be provided on the other profile variants.
  • the position of the tubular portion 12 relative to the connecting rod 4 may also be modified.
  • the connecting rod 4 may be at the level of the through-flow cross section of the at least one tubular portion 12, based on the vertical direction z of the hydrofoil 1 (cf. Fig. 4 , variant a).
  • regions in the longitudinal direction x may, for example, be designed with a through-flow cross section that narrows or widens in the through-flow direction.
  • the at least one tubular portion 12 throughout with a through-flow cross section that narrows or widens in the through-flow direction, as is depicted by way of example in Figure 5 in the variants a and d.
  • the outlet edge 17 of the tubular portion 12 may optionally also be similarly angled.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Hydraulic Turbines (AREA)
EP19152352.1A 2018-02-01 2019-01-17 Hydrofoil Withdrawn EP3521154A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018102289.1A DE102018102289A1 (de) 2018-02-01 2018-02-01 Hydrofoil

Publications (1)

Publication Number Publication Date
EP3521154A1 true EP3521154A1 (de) 2019-08-07

Family

ID=65036704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19152352.1A Withdrawn EP3521154A1 (de) 2018-02-01 2019-01-17 Hydrofoil

Country Status (7)

Country Link
US (1) US20190233063A1 (de)
EP (1) EP3521154A1 (de)
JP (1) JP2019131173A (de)
KR (1) KR20190093525A (de)
CN (1) CN110104136A (de)
AU (1) AU2019200185A1 (de)
DE (1) DE102018102289A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10597118B2 (en) 2016-09-12 2020-03-24 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
US10946939B1 (en) 2020-04-22 2021-03-16 Kai Concepts, LLC Watercraft having a waterproof container and a waterproof electrical connector
US11897583B2 (en) 2020-04-22 2024-02-13 Kai Concepts, LLC Watercraft device with hydrofoil and electric propulsion system
US11485457B1 (en) 2021-06-14 2022-11-01 Kai Concepts, LLC Hydrojet propulsion system
US11878775B2 (en) 2021-07-13 2024-01-23 Kai Concepts, LLC Leash system and methods of use

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087452A (en) * 1960-02-25 1963-04-30 Grimston Francis Bri Sylvester Hydrofoils
FR2832692A1 (fr) * 2001-11-28 2003-05-30 Jean Jacques Deboichet Dispositif permettant d'ameliorer les capacites des ailerons pour planche a voile
US20050255764A1 (en) * 2004-05-17 2005-11-17 Woolley Robert C Flying ski
US20150104985A1 (en) * 2013-10-10 2015-04-16 Jacob Willem Langelaan Weight-shift controlled personal hydrofoil watercraft
US20160332699A1 (en) * 2015-05-11 2016-11-17 WindRider International, LLC Tubular element combined with hydrofoil or rudder for a water vessel
DE202017103703U1 (de) * 2017-06-21 2017-07-12 Ellergon Antriebstechnik Gesellschaft M.B.H. Elektrisch angetriebenes Hydrofoil

Family Cites Families (16)

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US1410872A (en) * 1920-05-07 1922-03-28 Frederick W Baldwin Torpedo
US3536025A (en) * 1968-08-21 1970-10-27 Leisure Ind Motorized surfboard
JPS5271095A (en) * 1975-08-14 1977-06-14 Mitsui Eng & Shipbuild Co Ltd Ship
JPS6038895U (ja) * 1983-08-25 1985-03-18 吉田　稔 水上走行装置
CN1041732A (zh) * 1989-10-28 1990-05-02 上海交通大学 船用啮合式双桨及其变异导管
US7047901B2 (en) * 2003-01-17 2006-05-23 Shane Chen Motorized hydrofoil device
US7267589B2 (en) * 2004-07-22 2007-09-11 Enviroprop Corporation System and apparatus for improving safety and thrust from a hydro-drive device
GB0602135D0 (en) * 2006-02-02 2006-03-15 Townsend Barnaby Water sports device
CN102596708B (zh) * 2009-10-27 2015-05-06 克里斯托弗·普雷斯顿 用动力推动的水运动板
DE102010044435A1 (de) * 2010-09-06 2012-03-08 Lais Gmbh Antrieb
KR20130129492A (ko) * 2012-05-21 2013-11-29 이용만 수중 자전거용 추진장치
JP5984976B2 (ja) 2014-02-07 2016-09-06 エレルゴン・アントリーブステヒニク・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツングＥＬＬＥＲＧＯＮ Ａｎｔｒｉｅｂｓｔｅｃｈｎｉｋ ＧｍｂＨ ハイドロフォイル
USD843303S1 (en) * 2016-07-08 2019-03-19 MHL Custom, Inc. Hydrofoil board
US10597118B2 (en) * 2016-09-12 2020-03-24 Kai Concepts, LLC Watercraft device with hydrofoil and electric propeller system
US10099754B2 (en) * 2017-08-22 2018-10-16 Yujet International Limited Motorized hydrofoil device
AU2017268537B1 (en) * 2017-11-28 2018-07-26 Fliteboard Pty Ltd Module for Connecting a Mast to a Board

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087452A (en) * 1960-02-25 1963-04-30 Grimston Francis Bri Sylvester Hydrofoils
FR2832692A1 (fr) * 2001-11-28 2003-05-30 Jean Jacques Deboichet Dispositif permettant d'ameliorer les capacites des ailerons pour planche a voile
US20050255764A1 (en) * 2004-05-17 2005-11-17 Woolley Robert C Flying ski
US20150104985A1 (en) * 2013-10-10 2015-04-16 Jacob Willem Langelaan Weight-shift controlled personal hydrofoil watercraft
US20160332699A1 (en) * 2015-05-11 2016-11-17 WindRider International, LLC Tubular element combined with hydrofoil or rudder for a water vessel
DE202017103703U1 (de) * 2017-06-21 2017-07-12 Ellergon Antriebstechnik Gesellschaft M.B.H. Elektrisch angetriebenes Hydrofoil

Also Published As

Publication number Publication date
AU2019200185A1 (en) 2019-08-15
KR20190093525A (ko) 2019-08-09
JP2019131173A (ja) 2019-08-08
DE102018102289A1 (de) 2019-08-01
CN110104136A (zh) 2019-08-09
US20190233063A1 (en) 2019-08-01

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