GB2249758A - A waterborne craft - Google Patents

A waterborne craft Download PDF

Info

Publication number
GB2249758A
GB2249758A GB9000591A GB9000591A GB2249758A GB 2249758 A GB2249758 A GB 2249758A GB 9000591 A GB9000591 A GB 9000591A GB 9000591 A GB9000591 A GB 9000591A GB 2249758 A GB2249758 A GB 2249758A
Authority
GB
United Kingdom
Prior art keywords
craft
sail
projection
sailboard
hull
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Withdrawn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
GB9000591A
Other versions
GB9000591D0 (en
Inventor
Stuart Ralph King-Cox
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.)
KING COX STUART RALPH
Original Assignee
KING COX STUART RALPH
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 KING COX STUART RALPH filed Critical KING COX STUART RALPH
Priority to GB9000591A priority Critical patent/GB2249758A/en
Publication of GB9000591D0 publication Critical patent/GB9000591D0/en
Publication of GB2249758A publication Critical patent/GB2249758A/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Withdrawn legal-status Critical Current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 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B39/062—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water the foils being mounted on outriggers or the like, e.g. antidrift hydrofoils for sail boats

Abstract

A waterborne craft such as a sailboard 2 comprises a projection 22 extending outwardly from each side of the hull 4, each projection 22 having at its outer end a downwardly extending portion 26 in the form of a blade which tapers to a bottom edge 27. A sail mast is received within a pivotally mounted tubular shaft on the deck of the craft which comprises a glass fibre material. <IMAGE>

Description

A WATERBORNE CRAFT The present invention relates to a waterborne craft and particularly but not exclusively to a sailboard.
According to the present invention there is provided a waterborne craft comprising a hull and a projection extending outwardly from each side of the hull, each projection having at a region remote from the hull a downwardly extending portion.
The craft may comprise a sail support for attachment thereto of a sail mast.
The sail support may comprise a tubular shaft mounted at its lower end to the deck of the craft.
The support may be pivotally mounted to the deck of the craft.
The craft may comprise a mast to which is attached a sail, the mast being received within the support.
The craft may comprise a glass fibre material.
An embodiment of the present invention will now be described by way of example and with reference to the accompanying drawings in which: Figure 1 shows a side view of an embodiment of a sailboard according to the present invention, and Figure 2 shows a front view of the sailboard shown in Figure 1 Referring to the accompanying drawings, a sailboard 2 comprises a glass fibre hull 4 and a sail support 6 in the form of a tubular shaft pivotally mounted at its lower end to the deck 8 of the sailboard. Received within the sail support 6 is a mast 10 to which is attached a sail 12. Also attached to the mast 10 is a boom 14. The boom is further attached to the opposite side of the sail 12. Extending downwards from the boom 14 is a rope 16 to enable the boom 14 and thereby the sail 12 to be rotated about the axis of the sail support 6.Further ropes 18 and 20 extend between the sail support 6 and the deck 8 of the sailboard 2.
Extending outwardly from each side of the hull 4 of the sailboard 2 is a projection 22 having a width which is sufficient to enable a person 24 to sit whilst holding the rope 16 attached to the sail 12. At its outer end each projection 22 has a downwardly extending portion 26 which tapers to a bottom edge 27.
The inside surface of each projection 22 and each downwardly extending portion 26 is in the form of an aerofoil section which provides a venturi shape underneath. This produces a downward force when the sailboard 2 is in motion and helps to prevent the sailboard 2 taking off in a good breeze.
Whilst the sailboard is horizontal the bottom edge 27 is above the surface of the water as shown in Figure 2, but when the sailboard inclines one of the downwardly extending portions 26 which acts as a blade penetrates the water. This enables the sailboard 2 to be used relatively safely by an inexperienced person. Also the blades 26 help the sailboard to travel faster than a sailboard wihout such blades 26. Speeds of up to 20 knots are possible. The projections 22 can be detached from the hull 4 of the sailboard 2 and replaced with projections 22 of different configuration.
Alternatively, the sailboard 2 can be used without either projection 22. The provision of a tubular sail support 6 enables masts 10 and sails 12 of different size to be used by simply removing the mast from inside the sail support 6 and inserting a different mast 10.

Claims (8)

1 A waterborne craft comprising a hull and a projection extending outwardly from each side of the hull, each projection having at a region remote from the hull a downwardly extending portion.
2 A craft as claimed in claim 1, wherein the inside surface of each projection and downwardly extending portion is in the form of an aerofoil section which provides a venturi shape underneath.
3 A craft as claimed in claim 1 or claim 2, comprising a sail support for attachment thereto of a sail mast.
4 A craft as claimed in claim 3 wherein the sail support comprises a tubular shaft mounted at its lower end to deck of the craft.
5 A craft as claimed in claim 4, wherein the support is pivotally mounted to the deck of the craft.
6 A craft as claimed in any one of claims 3 to 6, comprising a mast to which is attached a sail, the mast being received within the support.
7 A craft as claimed in in any one of the preceding claims, wherein the craft comprises a glass fibre material.
8 A waterborne craft substantially as hereinbefore described with reference to the accompanying drawings.
GB9000591A 1990-01-11 1990-01-11 A waterborne craft Withdrawn GB2249758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9000591A GB2249758A (en) 1990-01-11 1990-01-11 A waterborne craft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9000591A GB2249758A (en) 1990-01-11 1990-01-11 A waterborne craft

Publications (2)

Publication Number Publication Date
GB9000591D0 GB9000591D0 (en) 1990-03-14
GB2249758A true GB2249758A (en) 1992-05-20

Family

ID=10669115

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9000591A Withdrawn GB2249758A (en) 1990-01-11 1990-01-11 A waterborne craft

Country Status (1)

Country Link
GB (1) GB2249758A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257620B1 (en) * 2000-02-23 2001-07-10 Bernard Carroll Kenney High efficiency ski for sailing on snow or ice

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB562947A (en) * 1943-04-12 1944-07-21 Norman Herbert May Improvements in canoes or boats stabilised by catamarans
GB1209753A (en) * 1966-10-28 1970-10-21 Bosch Gmbh Robert Improvements in electrical accumulators
GB1258317A (en) * 1968-03-27 1971-12-30
US3762353A (en) * 1971-09-09 1973-10-02 S Shutt High speed sailboat
US3780789A (en) * 1969-10-08 1973-12-25 Alusuisse Apparatus for the vertical multiple continuous casting of aluminum and aluminum alloys
GB2085365A (en) * 1980-10-17 1982-04-28 Seal Marine Ltd Sailing board or surfboard

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB562947A (en) * 1943-04-12 1944-07-21 Norman Herbert May Improvements in canoes or boats stabilised by catamarans
GB1209753A (en) * 1966-10-28 1970-10-21 Bosch Gmbh Robert Improvements in electrical accumulators
GB1258317A (en) * 1968-03-27 1971-12-30
US3780789A (en) * 1969-10-08 1973-12-25 Alusuisse Apparatus for the vertical multiple continuous casting of aluminum and aluminum alloys
US3762353A (en) * 1971-09-09 1973-10-02 S Shutt High speed sailboat
GB2085365A (en) * 1980-10-17 1982-04-28 Seal Marine Ltd Sailing board or surfboard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257620B1 (en) * 2000-02-23 2001-07-10 Bernard Carroll Kenney High efficiency ski for sailing on snow or ice

Also Published As

Publication number Publication date
GB9000591D0 (en) 1990-03-14

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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)