EP1035999A1 - Voile creant de la portance et systeme de voiles - Google Patents

Voile creant de la portance et systeme de voiles

Info

Publication number
EP1035999A1
EP1035999A1 EP98959618A EP98959618A EP1035999A1 EP 1035999 A1 EP1035999 A1 EP 1035999A1 EP 98959618 A EP98959618 A EP 98959618A EP 98959618 A EP98959618 A EP 98959618A EP 1035999 A1 EP1035999 A1 EP 1035999A1
Authority
EP
European Patent Office
Prior art keywords
mainsail
sail
lift
jib
creating
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Withdrawn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
EP98959618A
Other languages
German (de)
English (en)
Inventor
George S. Berean
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
Priority claimed from US08/982,615 external-priority patent/US5918561A/en
Application filed by Individual filed Critical Individual
Publication of EP1035999A1 publication Critical patent/EP1035999A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels
    • B63H9/068—Sails pivotally mounted at mast tip
    • 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
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B1/121—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising two hulls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • B63B2015/0016—Masts characterized by mast configuration or construction
    • B63B2015/005—Masts characterized by mast configuration or construction with means for varying mast position or orientation with respect to the hull
    • B63B2015/0075—Masts characterized by mast configuration or construction with means for varying mast position or orientation with respect to the hull with mast foot adapted for being moved, e.g. athwartship

Definitions

  • This invention relates generally to the field of sails and sail boats and more particularly to a mainsail that can create lift and a sail system of a mainsail and a jib sail that together create lift and increase the speed of a sailboat by 15-25%.
  • a sailboat is propelled by wind impinging on a sail to create thrust (a forward force vector).
  • a typical sail also creates drag (an aftward force vector) tending to cancel thrust.
  • the boat's hull creates considerable drag as it passes through the water.
  • the magnitude of the total drag force is proportional to boat's velocity and is related to the amount of the hull under water, the exact shape of the hull, the size and shape of the sail, and other factors. If a sail system can create lift (an upward force vector) as well as thrust and drag, the hull is pulled more out of the water (called a reduction in heeling) . This effect can considerably reduce drag caused by the hull. Since hull drag is the major component of drag, the speed of the boat can be substantially increased. Also, if airflow over the sail can be optimized, sail drag is decreased as well resulting in further increases in speed.
  • Prior art systems all attach the base of the mast to either a flexible joint on the centerline or to a straight or curved track running athartship. This has the disadvantage of not being able to position the sail at an optimum angle with respect to the wind for maximum lift and minimum drag.
  • Prior art systems also use conventional triangular sails which are also not optimum for producing maximum lift.
  • the invention relates to an improved lift creating sail and sail system. It contains a mainsail and a jib sail. Both sails can be tilted to produce lift.
  • the mainsail is an aerodynamical- ly efficient airfoil that can be made from a set of panels.
  • the mainsail is normally mounted on a pivot that can be located near the its center.
  • the pivot is normally attached to an A-frame in such a way that it can move about three degrees of freedom. This way the mainsail can be tilted athartships (port and starboard); it can be rotated along the yaw axis; and it can be tilted fore and aft.
  • the mainsail can be of generally rectangular shape, or any other convenient shape, and can be furled by either rolling it up or gathering it in.
  • the various axes of tilt and rotation are totally general whereby the sail can be tilted or yawed to any angle or orientation with respect to the boat and the wind.
  • the generally rectangular sail can be used so that its length is generally up and down or it can be tilted so that its length is substantially horizontal as a square sail. It can, at the same time, be yawed to any angle and tilted athart- ships to any angle.
  • the mainsail can be mounted so that its weight rests on the pivot and A-frame from its center. There is generally no mast and no weight supported by the base of the mainsail.
  • the system also has a jib sail that also tilts into the wind to generate additional lift and to compensate for any lee helm effect.
  • This jib can track the athartship tilt of the mainsail, or it can be positioned at a different angle for optimum trim and efficiency.
  • Figure 1 shows a perspective view of a type of sailboat equipped with an embodiment of the present invention.
  • Figure 2 shows a top view and a front view of at type of sailboat equipped with an embodiment of the present invention.
  • Figure 3 shows a perspective view of an embodiment of a mainsail.
  • Figure 4 shows a side view and a top view of an embodiment of a mainsail.
  • Figure 5 shows an embodiment of the mainsail panels creating an air slot.
  • Figure 6 shows how the present invention is operated in reach or tack (wind athartships or forward) .
  • Figure 7 shows how the present invention is operated in run (wind aft) .
  • Figure 8 shows an optional coupling of the mainsail and jib 95 sail.
  • Figures 1 shows a perspective view of a type of sailboat with two hulls.
  • the invention is equally suited for use on a monohull boat or any other combination of hulls.
  • Figure 1 shows a perspective view of a type of sailboat with two hulls. The invention is equally suited for use on a monohull boat or any other combination of hulls.
  • each of the hulls (1) is elongated with a major axis defining a fore and aft direction along the boat.
  • the mainsail (2) in this embodiment is substantially rectangular; however, the mainsail can have any other convenient shape.
  • the jib sail (3) is substantially triangular in this embodiment, and can be mounted
  • the jib sail can have any other convenient shape.
  • the mainsail (2) shown in figure 1 can be made of several panels (4) of sail material, or it can be a continuous sail.
  • the panels (4) are held together using spars (5) or trusses, or any 110 other construction means to form a semi-rigid frame.
  • the mainsail (2) is normally mounted at a pivot (8) that allows it three degrees of freedom. This means that the mainsail (2) can be tilted athartships and fore and aft, and it can be yawed to any angle with respect to the centerline of the boat.
  • 115 truss or cross spar (9) can be located at the center of the mainsail (2), and one end of this truss (9) is normally attached to the pivot point ()8.
  • the pivot (8) is firmly attached to an A-frame (10) that is normally rigidly attached to the hull( ⁇ ) (1). The entire weight of the mainsail (2) can rest on this pivot
  • the base of the mainsail is not normally attached to the hull.
  • the A-frame (10) thus supports the mainsail (2).
  • An optional track or traveler (6) is located below the pivot (8) at the level of the top of the hull(s) (1).
  • This track is generally not attached to the base of the mainsail.
  • the 125 base of the mainsail (2) can move substantially away from this track (6) when the mainsail is tilted fore and aft.
  • the optional track (6) allows the tilt motion or position of the mainsail (2) to be cross coupled to the jib sail (3).
  • the forward foot of the jib sail (3) can be attached to a second track (7) that is also
  • the jib sail moves in the same direction as the fore foot of the mainsail.
  • the optional method of coupling the motion of the two sails in this embodiment can be through cross-rigged lines between the mainsail track or traveler (6) and fore foot of the jib sail on its track (7).
  • Figure 2A shows a top view and Figure 2B shows a front view of the invention of figure 1.
  • the hull (1), mainsail (2), jib sail (3) and the jib sail track (7) can be seen.
  • the position of the mainsail track (6) is also shown.
  • the athartship tilt of the mainsail (2) can be
  • Figure 3 shows that the mainsail can be made up from a plurality of panels (4) of sail material on a frame made of longitudinal spars (5).
  • the horizontal truss (9) can be seen attached to a cross truss (11) at the center of the mainsail.
  • 150 Either a truss or a cross spar can be used; however, a truss has been found to be stronger.
  • Figure 4A is a side view and Figure 4B is a top view of the mainsail of figure 3. Here the structure of the truss (11) can be more clearly seen. Also in figures 4A and 4B, two leading edge
  • 155 foils (12) can be seen. These allow the individual panels of the mainsail to rotate about the longitudinal spar.
  • the sail area can be varied by furling in and out the sail which can be rolled around the longitudinal spar. In an alternate embodiment of the present invention, the sail area can be varied by sliding the
  • Figure 5 shows an embodiment of the leading edge foil that would vary the sail area by sliding the sail towards the cross spar.
  • the vertical spars (5) are seen with the sail
  • Figure 6 shows a possible orientation of the mainsail and jib sail in run (run is a situation where the wind is aft of the boat).
  • the mainsail can be tilted along three degrees of freedom to achieve maximum lift and thrust.
  • the forefoot of the jib sail 180 tracks the athartship tilt of the mainsail, and can be trimmed for the exact heading with respect to the wind and wind and sea conditions.
  • the system will be adjusted to different angles and trim depending on the exact wind direction (directly astern as opposed to an angle off the beam) .
  • Figure 7 shows a possible orientation of the mainsail and jib sail in reach or tack (reach is when the wind is athartships, while tack is when the wind is at an angle off the bow - tacking is the art of taking a sailboat into the wind by alternately changing heading with respect to the wind from port bow to
  • Figure 8A and 8B show how the jib is optionally made to 195 track the athwartship motion of the mainsail.
  • Under the mainsail is a curved rocker shaped track (6) running athwartship at approximately halfway fore and aft.
  • On this track (6) is a carriage (17) that slides alone it. This carriage (17) is attached through lines to the mainsail (2) at the front spar.
  • the mainsail follows the front or forefoot of the jib. If the jib moves right or starboard, so does the bottom of the mainsail. It is important to note that the bottom of the mainsail (2) is not tightly connected to the carriage (17) on the amidships track (6), but rather is loosely connected through a series of lines.
  • Sailing a boat using the present invention consists of adjusting the yaw of the mainsail and jib sail, and then adjust-
  • the degree of yaw of the mainsail (which can control the amount of yaw of the jib sail) can be controlled by adjusting the position of the forefoot of the mainsail. This can be connected to its track by a traveler and fixed with lines an cleats.
  • the top of the mainsail can be
  • Sail trim of the mainsail can be adjusted by lines attached to the aft of the mainsail at the center, and bottom cross spars and secured by cleats.
  • Sail trim of the jib can be adjusted by lines attached to the aft foot of
  • the present invention is very useful in the sailboat industry. It is a novel way of increasing the speed of a sailboat by 15-25 percent by causing the mainsail and jib sail to product lift. This allows boats to race or to sail normally much faster than would otherwise be possible. There is a tremendous demand

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)
  • Jib Cranes (AREA)

Abstract

L'invention concerne une voile améliorée créant de la portance et un système de voiles dans lequel la grand-voile (2) sensiblement rectangulaire, constituée de panneaux, forme une surface portante efficace du point de vue aérodynamique, soutenue vers son centre par un pivot qui lui permet de pivoter dans trois dimensions. La grande voile (2) peut être inclinée à bâbord / à tribord, tournée autour de l'axe de lacet et inclinée en avant et en arrière pour créer de la portance et minimiser la traînée. Un foc (3), proposé en option, peut suivre les mouvements de la grand-voile et également créer de la portance. La grand-voile (2) et le foc (3) peuvent être réglés et positionnés en trois dimensions pour arriver à une portance maximale, minimiser la traînée et obtenir un système stable. Grâce à ce système de voiles, la vitesse du bateau augmente de 15-25 %.
EP98959618A 1997-12-02 1998-11-25 Voile creant de la portance et systeme de voiles Withdrawn EP1035999A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US08/982,615 US5918561A (en) 1997-12-02 1997-12-02 Lift creating sail and sail system
US982615 1997-12-02
US19184698A 1998-11-13 1998-11-13
US191846 1998-11-13
PCT/US1998/025261 WO1999028183A1 (fr) 1997-12-02 1998-11-25 Voile creant de la portance et systeme de voiles

Publications (1)

Publication Number Publication Date
EP1035999A1 true EP1035999A1 (fr) 2000-09-20

Family

ID=26887463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98959618A Withdrawn EP1035999A1 (fr) 1997-12-02 1998-11-25 Voile creant de la portance et systeme de voiles

Country Status (4)

Country Link
EP (1) EP1035999A1 (fr)
AU (1) AU1538099A (fr)
CA (1) CA2312097A1 (fr)
WO (1) WO1999028183A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104085521B (zh) * 2014-07-16 2016-08-24 上海海事大学 一种多联式非对称型船用风帆系统
FR3053656B1 (fr) * 2016-07-06 2018-08-17 Magnard Innovation Voilier comportant une structure a flotteur et a mat

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE253470C (fr) *
GB537138A (en) * 1939-09-08 1941-06-11 Rudow Rummler Improvements in rigs for sailing vessels
FR1423958A (fr) * 1964-11-27 1966-01-07 Gréement pivotant utilisant une voilure aérodynamique multiplan
GB1184914A (en) * 1966-04-28 1970-03-18 Albert Marie Gabriel D Galbert Pivotal Rigging for Sailing Boats and Sail Propelled Vehicles
GB2074116B (en) * 1980-04-21 1984-03-28 Thomson J A Rig structures
FR2712561B1 (fr) * 1993-11-17 1996-02-09 Gardelle Jean Marc Système de propulsion à voile pour embarcation.
AU3392395A (en) * 1994-08-31 1996-03-22 Richard John Leinberger Sailing vessels

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9928183A1 *

Also Published As

Publication number Publication date
CA2312097A1 (fr) 1999-06-10
AU1538099A (en) 1999-06-16
WO1999028183A8 (fr) 1999-09-23
WO1999028183A1 (fr) 1999-06-10

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