GB2487545A - Fin with hydrofoil surface to improve ride characteristics of a windsurfer - Google Patents

Fin with hydrofoil surface to improve ride characteristics of a windsurfer Download PDF

Info

Publication number
GB2487545A
GB2487545A GB1101270.5A GB201101270A GB2487545A GB 2487545 A GB2487545 A GB 2487545A GB 201101270 A GB201101270 A GB 201101270A GB 2487545 A GB2487545 A GB 2487545A
Authority
GB
United Kingdom
Prior art keywords
fin
hydrofoil
windsurfer
lifting surface
board
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Withdrawn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
GB1101270.5A
Other versions
GB201101270D0 (en
Inventor
Nicholas Robert Monk
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1101270.5A priority Critical patent/GB2487545A/en
Publication of GB201101270D0 publication Critical patent/GB201101270D0/en
Publication of GB2487545A publication Critical patent/GB2487545A/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • B63B35/7923—
    • B63B35/7926—

Abstract

A fin for a windsurfer is disclosed which has a small hydrofoil lifting surface 1, which may be positively-cambered, fixed to a fin 2 that can be inserted into a windsurfer board such that when the windsurfer achieves a certain speed, the stern of the windsurf board is lifted slightly out of the water, inducing a smoother ride, greater maneuverability, easier hydroplaning and larger jumps. A standardised board-attachment system 3 is built onto the top of the fin, including bolt holes 4. The fin and hydrofoil lifting surface may be formed from a single piece of material or may be formed from separate parts fixed or bonded together. Some parts of the fin and hydrofoil lifting surface may not be solid.

Description

Page 1 Fin with Hydrofoil Surface to Improve Ride Characteristics of a Conventional Windsurf Board This invention relates to a windsurf fin with one or more hydrofoil lifting surfaces and a standard mechanism for hoard-attachment.
A conventional windsurf fin generates no upwards lift, and as such the board typically sits on the surface of the water. This means the board is perturbed by small waves -an unsettling experience for the user. Current Hydrofoil systems for windsurfers aim to lift the board entirely out of the water, which means the ride is very unstable.
To overcome these problems, the present invention proposes a fin for a windsurfer, which incorporates a standard mechanism for board-attachment, with one or more hydrofoil surfaces to lift the stern of the board slightly out of the water and thus improve the ride characteristics of the windsurfer.
The proposed invention provides lift which raises the stern of the board up from the surface of the water, reducing the impact of small waves on the board. The board effectively rides on the submerged hydrofoil surface, rather than on the stern of the board, meaning the ride is noticeably smoother. Secondly, by lifting the stern out of the water, the hydrofoil flattens off the board which permits easier hydroplaning. Also, due to the extra lift generated by the hydrofoil, the height of jumps is improved. Finally, because the hydrofoil has less width than the stern of the board, the user experiences greater manoeuvrability when the stern is lifted out of the water by the hydrofoil device. The advantages over current windsurfer hydrofoil systems include being more stable, lighter, more compact, and easier to attach to a board.
The invention will now be described solely by way of example and with reference to the accompanying drawings in which: Figure 1 is a Three-Dimensional representation of a fin with a hydrofoil lifting surface.
In figure 1, a tapered hydrofoil 1, with positive camber, is fixed to a swept-back fin 2, with a symmetrical profile. A standardised board-attachment system 3 is built onto the top of the fin, including bolt holes 4.

Claims (9)

  1. Page 2 Claims 1. A fin for a windsurfer, which incorporates a standard mechanism for board-attachment, with one or more hydrofoil surfaces to lift the stern of the board slightly out of the water and thus improve the ride characteristics of the windsurfer.
  2. 2. A fin according to claim 1, in which some parts of the device are not solid.
  3. 3. A fin according to claim 1, in which the profile of the hydrofoil lifting surface is symmetrical.
  4. 4. A fin according to claim 3, in which the lift is generated by having the symmetric hydrofoil lifting surface pitched upwards relative to the surface of the water.
  5. 5. A fin according to claim 1, in which the hydrofoil lifting surface is positively cambered.
  6. 6. A fin according to claim 1, in which the hydrofoil lifting surface and the fin are one piece of material.
  7. 7. A fin according to claim 1, in which the hydrofoil lifting surface and the fin are separate parts which are fixed together.
  8. 8. A fin according to claim 7, in which the fin and the hydrofoil lifting surface are bonded together.
  9. 9. A fin according to claim 7, in which the hydrofoil lifting surface and the fin can be detached and reattached.
GB1101270.5A 2011-01-25 2011-01-25 Fin with hydrofoil surface to improve ride characteristics of a windsurfer Withdrawn GB2487545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1101270.5A GB2487545A (en) 2011-01-25 2011-01-25 Fin with hydrofoil surface to improve ride characteristics of a windsurfer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1101270.5A GB2487545A (en) 2011-01-25 2011-01-25 Fin with hydrofoil surface to improve ride characteristics of a windsurfer

Publications (2)

Publication Number Publication Date
GB201101270D0 GB201101270D0 (en) 2011-03-09
GB2487545A true GB2487545A (en) 2012-08-01

Family

ID=43769592

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1101270.5A Withdrawn GB2487545A (en) 2011-01-25 2011-01-25 Fin with hydrofoil surface to improve ride characteristics of a windsurfer

Country Status (1)

Country Link
GB (1) GB2487545A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015095910A1 (en) * 2013-12-24 2015-07-02 Leading Edge Surfboards Pty Ltd Surfcraft fin arrangement
DE202022001346U1 (en) 2022-06-11 2022-07-06 Jörg Sonntag Fin with lifting wings for watercraft
FR3120350A1 (en) * 2021-03-03 2022-09-09 matthias gibaud Asymmetrical fin Divisions for fins.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130554A1 (en) * 1981-08-01 1983-03-17 Johannes 6911 Campione d'Italia Jankowski Sailing craft
DE4304158A1 (en) * 1993-02-12 1994-08-25 Adalbert Kefer Buoyancy fin
DE19940072A1 (en) * 1999-08-24 2000-03-23 Tobias Anton Wind surfing board is provided with extra lift from two angled fins fitted to the bottom of the main fin
WO2007050473A2 (en) * 2005-10-25 2007-05-03 Douglas James Simpson High-lift, low drag fin for surfboard and other watercraft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130554A1 (en) * 1981-08-01 1983-03-17 Johannes 6911 Campione d'Italia Jankowski Sailing craft
DE4304158A1 (en) * 1993-02-12 1994-08-25 Adalbert Kefer Buoyancy fin
DE19940072A1 (en) * 1999-08-24 2000-03-23 Tobias Anton Wind surfing board is provided with extra lift from two angled fins fitted to the bottom of the main fin
WO2007050473A2 (en) * 2005-10-25 2007-05-03 Douglas James Simpson High-lift, low drag fin for surfboard and other watercraft

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015095910A1 (en) * 2013-12-24 2015-07-02 Leading Edge Surfboards Pty Ltd Surfcraft fin arrangement
FR3120350A1 (en) * 2021-03-03 2022-09-09 matthias gibaud Asymmetrical fin Divisions for fins.
DE202022001346U1 (en) 2022-06-11 2022-07-06 Jörg Sonntag Fin with lifting wings for watercraft

Also Published As

Publication number Publication date
GB201101270D0 (en) 2011-03-09

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)