EP0870674A2 - Système stabilisateur pour bâteaux - Google Patents

Système stabilisateur pour bâteaux Download PDF

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Publication number
EP0870674A2
EP0870674A2 EP98105948A EP98105948A EP0870674A2 EP 0870674 A2 EP0870674 A2 EP 0870674A2 EP 98105948 A EP98105948 A EP 98105948A EP 98105948 A EP98105948 A EP 98105948A EP 0870674 A2 EP0870674 A2 EP 0870674A2
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EP
European Patent Office
Prior art keywords
rail
outrigger
deck
supporting
sailboat
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Withdrawn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
EP98105948A
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German (de)
English (en)
Other versions
EP0870674A3 (fr
Inventor
Mario Ricardo Talasimov
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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 UY24511A external-priority patent/UY24511A1/es
Priority claimed from US08/891,807 external-priority patent/US5884575A/en
Application filed by Individual filed Critical Individual
Publication of EP0870674A2 publication Critical patent/EP0870674A2/fr
Publication of EP0870674A3 publication Critical patent/EP0870674A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
    • B63B43/04—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability
    • B63B43/08—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability by transfer of solid ballast
    • B63B43/085—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability by transfer of solid ballast the stabilising effect being provided by the weight of a person placed on an outrigger seat swingable around a vertical axis

Definitions

  • the present invention relates to a balance system for installation on small sailboats which improves the ability of a helmsman to counter the heeling force of the wind on the sails. More particularly, the system enables the helmsman to easily use his weight to limit the heel of the sailboat.
  • Fletcher discloses a convertible sailing vessel including a swinging arm.
  • the swinging arm is pivotally supported by a main frame at a single location.
  • the arm permits a crew member, but not the helmsman, to use body weight to balance the vessel.
  • U.S. Patent No. 4,539,926, issued September 10, 1985, to J. Boffer, discloses a sailboat having an outrigger which is supported solely by a sleeve which encircles the foot of the mast. The helmsman is supported on a seat on the outrigger. A relatively high cut sail is attached to the mast to allow the helmsman to pass under the sail when tacking.
  • U.S. Patent No. 4,852,507 issued August 1, 1989, to R.C. Ryon et al., discloses a sail craft including a semicircular seat, foot rail and back stop used by a helmsman in maneuvering his body as a counterweight.
  • U.S. Patent No. 4,936,236, issued June 26, 1990, to F.W. Sinden discloses a moment balancing rig for a sailboat.
  • the rotatable rig includes a boom for supporting the helmsman.
  • the boom is attached to a mast that is in turn attached to the hull of the boat.
  • French Application No. 79 11824 discloses a catamaran including a saddle permitting a helmsman seated in the saddle to balance the boat by pivoting the saddle.
  • the saddle is mounted on a short arm that requires insignificant support.
  • the present nautical balance system is a device that assists the helmsman in moving his body weight to counteract this heeling force.
  • the system also assists the helmsman to maintain his body weight beyond the windward rail for extended periods of time as the boat is sailed upwind.
  • the nautical balance system includes an outrigger that supports the helmsman.
  • the outrigger pivots about a bearing on the centerline of the boat.
  • the outrigger is supported by the pivot bearing and by a semicircular rail assembly fastened to the deck of the sailboat.
  • the outrigger is slidably supported by the rail assembly as the outrigger pivots about the bearing. Rollers are included to promote the movement of the outrigger along the rail.
  • the additional support of the rail assembly limits the force borne by the pivot bearing and the deck supporting the bearing.
  • the outrigger includes a seat for the helmsman. When seated on the outrigger the helmsman is able to stabilize himself and the outrigger by placing his feet on the rail assembly. The helmsman also controls the angular position of the outrigger with his feet placed on the rail assembly. To ensure that the helmsman can manipulate and stabilize himself the outrigger rides along a rail that is raised above the deck. The rail also extends beyond the limit of rotation of the outrigger so that the helmsman may always put both feet on the rail while straddling the outrigger. The seat is adjustable along the outrigger to fit the length of the helmsman's legs.
  • the pivot bearing is located in a position independent of the location of the mast thereby allowing the weight of the helmsman to be located at the optimal position for performance of the sailboat.
  • a pivot bearing located aft of the mast also permits the helmsman to swing behind the boom when tacking. This permits the boom to be positioned relatively lower on the mast and, therefore, the sail to be larger and more efficient.
  • Is is a further object of the invention to provide a nautical balance system having an outrigger supported at multiple points for holding a helmsman over the windward rail of a sailboat with minimal stress transmitted to the deck.
  • Another object of the invention is to provide a rail by which the helmsman can steady himself and manipulate the position of the outrigger with his feet on the rail.
  • Still a further object of the invention is to provide a seat for the helmsman which swings aft of a low boom when the boat is tacked.
  • Figure 1 is a side view of a sailboat including the present nautical balance system.
  • Figure 2 is a plan view of the sailboat shown in Figure 1.
  • Figure 3 is an enlarged, partial side view of the present nautical balance system.
  • Figure 4 is a perspective view of the present nautical balance system.
  • Figure 5 is a diagrammatic view representing the forces on the present nautical balance system.
  • Figure 6 is a diagrammatic view representing the forces on a sailboat including the present nautical balance system.
  • Figure 7 is a diagrammatic view representing the righting forces on a sailboat using the presente nautical balance system.
  • the present nautical balance system (10) installed on a small sailboat is shown in Figures 1 and 2.
  • the main structural assembly of the sailboat includes a hull (12) and a deck (14) .
  • a keel or centerboard (16) and a rudder (18) are attached to the underwater surface of hull (12) .
  • On the longitudinal center line of the hull (12) and deck (14) is a mast (20) that supports a boom (22) and a sail (24) .
  • the nautical balance system (10) as shown in Figure 4 includes an outrigger (26) , a pivot bearing (28) , and a rail assembly (30) .
  • Outrigger (26) is oriented primarily parallel to deck (14) and thus perpendicular to mast (20) .
  • Outrigger (26) includes a pivot end (32) and an outboard end (34) .
  • Pivot end (32) is pivotally supported by pivot bearing (28) .
  • Rail assembly (30) slidably supports outrigger (26) at a point between pivot end (32) and outboard end (34) .
  • pivot bearing (28) includes a sleeve (36) .
  • Sleeve (36) extends perpendicularly from deck (14) on the longitudinal centerline of hull (12) and deck (14) .
  • Pivot end (32) of outrigger (26) includes a perpendicular tube (38) that fits within sleeve (36) .
  • Tube (38) is free to rotate within sleeve (36) and outrigger (26) may therefore swing or rotate about pivot bearing (28) .
  • Proximate outboard end (34) of outrigger (26) is seat (40) .
  • Seat (40) provides means for supporting a weight, specifically the body weight of the helmsman, outboard of deck (14) .
  • Seat (40) is movably attached on outrigger (26) with bracket (42) .
  • Rail assembly (30) is fastened to deck (14) and further supports outrigger (26) .
  • Rail assembly (30) is essentially semicircular in shape to support outrigger (26) as it rotates or swings about pivot bearing (28) .
  • the semicircular shape has a constant radius of curvature but does not necessarily extend through precisely one half of a circle.
  • Rail assembly (30) has an upper support rail (44) and a lower connection rail (46) .
  • Upper support rail is supported above deck (14) by a plurality of generally vertical rail supports (48) .
  • Rail supports (48) are connected to lower connection rail (46) , wich is in turn fastened to deck (14) .
  • upper rail (44) is supported about 4-5 inches above the deck and rail assembly (30) has a radius of about 1 foot 33 ⁇ 4 inches.
  • upper rail (44) that comes in contact with and directly supports outrigger (26) . Therefore, it is the upper rail (44) that must have a constant radius of curvature and must be centered about pivot bearing (28) such that a single point along outrigger (26) contacts rail assembly (30) as outrigger swings or rotates about pivot bearing (28) .
  • lower connection rail (46) need not be precisely semicircular, but may include flattened sections (50) . To provide the most effective support it is important that upper rail (44) have a large diameter. A diameter larger than the beam of the boat can be support by lower rail (46) with flattened sections (50) that extend along the sides of deck (14) .
  • outrigger (26) includes an upper roller (52) disposed above upper rail (44) to assist the outrigger (26) in sliding along upper rail (44) .
  • Outrigger (26) also includes a lower roller (54) disposed below upper rail (44) .
  • Lower roller (54) steadies outrigger (26) by ensuring that outrigger (26) is kept in continuous contact with rail assembly (30) during any motion of the sailboat that tends to raise outrigger (26) .
  • rail supports (48) are attached to the inside edge of upper rail (44) .
  • Rail assembly (30) also includes stops (56) to limit to rotation or swing of outrigger (26) .
  • Stops (56) extend above upper rail (44) to engage outrigger (26) upon reaching the point of maximum rotation.
  • stops (56) are positioned to stop outrigger (26) when it has rotated 90° from the centerline of hull (12) and deck (14) .
  • the outrigger (26) in a position 90° from the centerline produces the maximun heel resisting moment by holding the weight of the helmsman the maximum distance from the center of the hull.
  • Rail assembly (30) extends beyond stops (56) to provide a resting surface for the helmsman's foot when the outrigger (26) engages stop (56) .
  • rail assembly (30) is not precisely a semicircle but extends through an arc greater than 180°, with stops (56) disposed a substantial distance from the ends of upper rail (44) .
  • seat (40) In use seat (40) is positioned such that the helmsman's legs comfortably reach rail assembly (30) when the helmsman is seated in seat (40) .
  • the helmsman sits in seat (40) and controls the sailboat from this position. Controls, such as the tiller and the sheets, are led to the helmsman seated in seat (40) .
  • the helmsman controls the rotation or swing of outrigger (26) with his feet placed on rail assembly (30) . As the force of the wind heels the sailboat, the helmsman swings himself outboard on outrigger (26) thereby using his weight to counteract the heeling force.
  • the outrigger (26) easily supports the weight of the helmsman as the helmsman moves his weight outboard to counter the heeling force of the wind on the sails.
  • the outrigger permits the helmsman to sail the boat from a steady secure position seated in seat (40) with his feet firmly placed on rail assembly (30) .
  • the helmsman can easily swing his weight inboard and outboard on outrigger (26) to maintain the most efficient sailing configuration.
  • the helmsman weight is supported by outrigger (26) at all times permitting the helmsman to keep his weight outboard for extended periods of time.
  • Adjustably supporting the weight of the helmsman with nautical balance system (10) described above has a number of significant advantages. As shown in Figure 5, the use of rail assembly (30) to support outrigger (26) significantly reduces the forces transmitted to structural members of deck (14) . Assuming a helmsman with a weight of 176 lbs (W h ) supported 2,7 ft (a) from rail assembly (30) and an upper rail with a radius of 1.3 ft (b).
  • the pivot bearing (28) be located independently from mast (20) .
  • the position of the center of lateral resistance (CLR) of the hull in the water must correspond to the center effort (CE) of the wind on the sails. Due to the effect of the waves produced along the hull of a moving sailboat and the effect of the shape of the sails, the CE and CLR continuously change.
  • the center of the sail plan is typically placed forward of the static lateral center of the underwater surface of the hull by 15 to 20 percent of the length of the load water line (LWL) as shown in Figure 6.
  • the center of gravity (CG) of the sailboat must correspond with the center of buoyancy (CB) of the hull to keep the trim and heel of the boat correct.
  • CCG center of gravity
  • the helmsman's weight is positioned to produce a CCG corresponding to the CB of the hull.
  • Outrigger (26) does not pivot about the mast, because to do so would require the mast location to be dependent on the CCG rather than on the efficient placement of the CE. If CE is displaced, thereby destroying the relationship between the CE and the CLR, the rudder must be turned to keep the sailboat sailing in a straight line. This excessive rudder displacement causes unwanted excessive drag, wich slows the sailboat.
  • nautical balance system (10) Another significant advantage of nautical balance system (10) is the ability to use a low boom. As the sailboat is tacked through the wind on a traditional small sailboat, the helmsman shifts his weight from one side of the sailboat to the other by ducking under the boom. The booms of traditional sailboats must therefore be located high enough to accommodate the helmsman. With the nautical balance system (10) the helmsman does not duck under the boom (22) , but rather swings behind boom (22) on seat (40) . This is possible, as shown in Figure 1, since seat (40) is aft of the end of boom (22) when the boom and outrigger are both centered along the centerline. The advantage of a low boom is illustrated in Figure 7.
  • the sail (24) having a low boom (22) is shown in solid lines.
  • a traditional sail (24') having a high boom (22') is shown in dashed lines.
  • the center of effort CE of sail (24) is lower than would be the center of effort CE' of a traditional sail (24') .
  • the traditional sail thus has a greater heeling moment arm H m '.
  • the heeling moment is countered by the displacement GZ of the center of gravity (CCG) from the center of buoyancy (CB). This displacement GZ or the weight of the helmsman must be increased if H m is increased to H m '.
  • a lower boom thus allows a lighter helmsman to carry a larger sail while countering the heeling force of the wind on the sail.

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  • 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)
  • Jib Cranes (AREA)
  • Tents Or Canopies (AREA)
EP98105948A 1997-04-09 1998-04-01 Système stabilisateur pour bâteaux Withdrawn EP0870674A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
UY24511A UY24511A1 (es) 1997-04-09 1997-04-09 Sistema de balanceo nautico
UY2451197 1997-04-09
US891807 1997-07-14
US08/891,807 US5884575A (en) 1997-07-14 1997-07-14 Nautical balance system

Publications (2)

Publication Number Publication Date
EP0870674A2 true EP0870674A2 (fr) 1998-10-14
EP0870674A3 EP0870674A3 (fr) 2000-03-29

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EP98105948A Withdrawn EP0870674A3 (fr) 1997-04-09 1998-04-01 Système stabilisateur pour bâteaux

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2238464A (en) 1939-01-23 1941-04-15 William G Fletcher Convertible sailing vessel
FR2464180A1 (fr) 1979-05-08 1981-03-06 Gouin Raymond Ski-voile
US4539926A (en) 1982-12-18 1985-09-10 Boffer Juergen Board-like floating body
US4852507A (en) 1988-01-07 1989-08-01 Randall C. Ryon Sail-wing and controls for a sail craft
US4936236A (en) 1989-03-20 1990-06-26 Sinden Frank W Symmetrical sailboat with moment balancing rig
US4986202A (en) 1986-09-08 1991-01-22 Cartier International B.V. Light dropkeel boat with sliding means to control the transverse balance thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643628A (en) * 1950-08-24 1953-06-30 Sveinsson Louis Sailboat construction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2238464A (en) 1939-01-23 1941-04-15 William G Fletcher Convertible sailing vessel
FR2464180A1 (fr) 1979-05-08 1981-03-06 Gouin Raymond Ski-voile
US4539926A (en) 1982-12-18 1985-09-10 Boffer Juergen Board-like floating body
US4986202A (en) 1986-09-08 1991-01-22 Cartier International B.V. Light dropkeel boat with sliding means to control the transverse balance thereof
US4852507A (en) 1988-01-07 1989-08-01 Randall C. Ryon Sail-wing and controls for a sail craft
US4936236A (en) 1989-03-20 1990-06-26 Sinden Frank W Symmetrical sailboat with moment balancing rig

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