EP0059344A1 - Planche à voile - Google Patents

Planche à voile Download PDF

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Publication number
EP0059344A1
EP0059344A1 EP82100958A EP82100958A EP0059344A1 EP 0059344 A1 EP0059344 A1 EP 0059344A1 EP 82100958 A EP82100958 A EP 82100958A EP 82100958 A EP82100958 A EP 82100958A EP 0059344 A1 EP0059344 A1 EP 0059344A1
Authority
EP
European Patent Office
Prior art keywords
board
resistance
wind
fins
displacement
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Withdrawn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
EP82100958A
Other languages
German (de)
English (en)
Inventor
Emil Dipl.-Ing. Weiland
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of EP0059344A1 publication Critical patent/EP0059344A1/fr
Withdrawn legal-status Critical Current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 
    • B63B32/00—Water sports boards; Accessories therefor
    • B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards

Definitions

  • the invention relates to a windsurf board as is generally known in water sports. Such boards are generally operated between two border areas, namely when the wind is weak and driving at low speed and when the wind is strong at high speed.
  • the lift is generated almost exclusively by hydrostatic means.
  • the resistance is generated in a hydrodynamic way and essentially consists of the frictional resistance, the wave resistance and the pressure resistance. Every surfboard or surfboard design is therefore based on the requirement to shape it in such a way that this total resistance is as low as possible.
  • the design of the rear of the board plays a major role here, because the separation effects of the flow at the rear create a large proportion of the total resistance. So far, this situation has been countered by providing buoyancy bodies designed for the so-called "displacement travel" with a more or less pointed tail. as is generally the case with hulls and hulls. Sudden changes in cross-section are thereby avoided, detachment effects - as explained above - largely reduced.
  • the present invention is based on the object of creating a surfboard in which the hydrodynamic resistance is reduced both during displacement travel and in the sliding state, and thus an optimization of the driving behavior in the entire speed range possible for surfboards is achieved.
  • FIG. 1 shows a surfboard 10 in the so-called sliding state, that is to say at a relatively high speed.
  • This board is set at a certain angle 0I to the water surface 15, as a result of which a certain part of the board is “wetted”.
  • the so-called rear flow is formed at the rear and “spraying" from the flow around the side.
  • the stern of a sliding hull must be "cut off” with a sharp edge perpendicular to the direction of travel.
  • one or more displacement bodies 12 are arranged on the rear 11, which is cut off at right angles to the longitudinal edge of the board, the cross-sectional profile of which is designed over the length in such a way that there is a continuous cross-sectional transition 14 in the rear region.
  • the lateral spraying can also be reduced, which likewise leads to a reduction in resistance.
  • the fins 13 are preferably guided over the entire length of the wetted region (see FIG. 1).
  • the effect of the fins 13 can now be increased by the fact that they do not run exactly parallel to the longitudinal axis, but instead are set at an angle to the direction of travel, as shown in the example according to FIG. 2. As a result, they then act like low-stretch wings that have strong vertebrae. By appropriately coordinating the fin geometry and the angle it can be achieved that the edge vortices at the edge of the board, which generate the induced resistance, are practically eliminated.
  • a special embodiment of the invention provides that one displacement body 12 (FIG. 3) is arranged on the lateral edges of the board rear 11, these displacement bodies 12 being designed such that they simultaneously serve as fins.
  • an expedient configuration of the displacement body is made by deviating from the circular cross section and by placing the height and length in a correct relationship in order to obtain optimum directional stability.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
EP82100958A 1981-02-27 1982-02-10 Planche à voile Withdrawn EP0059344A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3107402 1981-02-27
DE3107402A DE3107402C2 (de) 1981-02-27 1981-02-27 Segelbrett

Publications (1)

Publication Number Publication Date
EP0059344A1 true EP0059344A1 (fr) 1982-09-08

Family

ID=6125901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100958A Withdrawn EP0059344A1 (fr) 1981-02-27 1982-02-10 Planche à voile

Country Status (2)

Country Link
EP (1) EP0059344A1 (fr)
DE (1) DE3107402C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264279A1 (fr) * 1986-10-15 1988-04-20 Motion Design Creations Inc., Aile pour engin flottant
FR2625170A1 (fr) * 1987-12-29 1989-06-30 Alcantara Gerard Flotteur polyvalent de planche a voile
WO2005066018A1 (fr) * 2004-01-09 2005-07-21 Surfing Hardware International Holdings Pty Limited Aileron de planche de surf

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8401506L (sv) * 1984-03-19 1985-09-20 Bengt Silfversparre Anordning for att endra bottenytans storlek och form hos en vindsurfingbreda

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2809956A1 (de) * 1978-02-07 1979-08-09 Hubert Raudaschl Segelbrett zum stehbrettsegeln
DE2842675A1 (de) * 1978-09-29 1980-04-10 Hannes Marker Segelbrett

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2809956A1 (de) * 1978-02-07 1979-08-09 Hubert Raudaschl Segelbrett zum stehbrettsegeln
DE2842675A1 (de) * 1978-09-29 1980-04-10 Hannes Marker Segelbrett

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264279A1 (fr) * 1986-10-15 1988-04-20 Motion Design Creations Inc., Aile pour engin flottant
US4811674A (en) * 1986-10-15 1989-03-14 Motion Design Creations Inc. Foil arrangement for water-borne craft
FR2625170A1 (fr) * 1987-12-29 1989-06-30 Alcantara Gerard Flotteur polyvalent de planche a voile
WO2005066018A1 (fr) * 2004-01-09 2005-07-21 Surfing Hardware International Holdings Pty Limited Aileron de planche de surf

Also Published As

Publication number Publication date
DE3107402C2 (de) 1982-12-30
DE3107402A1 (de) 1982-09-23

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT LI NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19830814

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WEILAND, EMIL, DIPL.-ING.