EP2197734A1 - Ballast mobile pour bateau à voile et navire - Google Patents

Ballast mobile pour bateau à voile et navire

Info

Publication number
EP2197734A1
EP2197734A1 EP07803086A EP07803086A EP2197734A1 EP 2197734 A1 EP2197734 A1 EP 2197734A1 EP 07803086 A EP07803086 A EP 07803086A EP 07803086 A EP07803086 A EP 07803086A EP 2197734 A1 EP2197734 A1 EP 2197734A1
Authority
EP
European Patent Office
Prior art keywords
ballast
tunnel
arrangement according
conduit
movable
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.)
Granted
Application number
EP07803086A
Other languages
German (de)
English (en)
Other versions
EP2197734B1 (fr
Inventor
Vincent De Troz
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.)
Speed 4 Sail S A
Speed 4 Sail SA
Original Assignee
Speed 4 Sail S A
Speed 4 Sail SA
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 Speed 4 Sail S A, Speed 4 Sail SA filed Critical Speed 4 Sail S A
Priority to PL07803086T priority Critical patent/PL2197734T3/pl
Publication of EP2197734A1 publication Critical patent/EP2197734A1/fr
Application granted granted Critical
Publication of EP2197734B1 publication Critical patent/EP2197734B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses

Definitions

  • This invention relates to sailboats and partially to motorboats. More specifically, this invention describes equipment intended to improve the performance of a sailboat by increasing the stability, or "stiffness", - the ability of the sailboat to resist the heeling force of the sails.
  • the stiffness as it will be called in the following, is afforded by the righting moment. Enhancing the stiffness brings significant extra power to the sails and, furthermore, increases the equilibrium and the safety of boats in general. Good stiffness enables a ship to have all sails set wind abeam, whilst maintaining the boat at angles of about a normal heeling (the first 30 degrees of heeling). The greater the stiffness (or righting ability) of the boat, the more powerful the sails can be and the faster the boat can be.
  • Sailboats must have a system ensuring stability to counterbalance the sails' thrust.
  • this problem is solved in various ways in sailboats: multihulls have several hulls, big centreboard boats have inside or outside ballasts, keelboats have an outside fixed ballast also called fin keel. Some race keelboats have one or two movable keels. In addition all these sailboats can have several inside ballast tanks.
  • ballasted swinging keel brought a beginning of response to this problem, allowing to anticipate the heeling by pre inclining the keel which increases the stiffness. But the anti-leeway plane, once tilted, is transformed into a foil and develops a undesired lift effect.
  • the double ballasted swinging keel system allows to partially solve this problem by presetting the incidence angles. In this system, the hinge axes are rotated slightly one towards the other in order to cancel out the lift effect.
  • WO 91/19641 and FR 2818236 relate to systems which are based on movable ballasts inside a hull.
  • FR 2818236 offer several disadvantages.
  • the solution proposed in FR 2818236 can hardly be applied on a cruising sailboat because it occupies the complete space on the boat's centre and thus bans all crew movement in the hull.
  • the weight is positioned high in the hull and this is detrimental to righting the boat, once capsised.
  • the mast must swing athwart ship to actuate the ballast which weakens the whole system. Indirectly resulting therefrom, good watertightness is almost impossible, which is a big disadvantage. Tilting the mast and the sails intentionally to actuate the system is simply aberrant since it is deteriorating the above problem of the sails thrust force acting overboard which is generating the prejudicing loading vector on the fore part of the boat.
  • a movable ballast arrangement for a vessel, such as a sailboat, motorboat or ship.
  • the movable ballast is located in a tunnel or conduit provided inside and preferably close to the bottom hull of the vessel.
  • the tunnel or conduit in the hull may comprise straight and/or curved segments.
  • the tunnel or conduit may be provided in the form of a closed loop.
  • the tunnel or conduit may have a horseshoe form.
  • the ends of the tunnel or conduit may extend towards the aft section of the vessel.
  • the tunnel or conduit may comprise sidewalls provided with a set of rails or tracks for the movable ballast.
  • the movable ballast may be provided as a train set.
  • the operation of the movable ballast in the tunnel or conduit may be manual.
  • the operation of the movable ballast in the tunnel or conduit may be power-assisted.
  • a mechanical force may be applied to the movable ballast.
  • the mechanical force may be applied through a cable, toothed belt or chain means.
  • the cable, toothed belt or chain means may be an endless means.
  • the tunnel or conduit may be hermetically sealed.
  • the tunnel or conduit may comprise a neutral atmosphere, preferably nitrogen.
  • the tunnel may be built like a cylinder and the ballast like a two-headed piston.
  • the ballast may be actuated by pressurising a gas or a liquid on one of its faces and releasing the gas or the liquid on its other face.
  • the piston has an articulated body allowing it to bend between its two ends.
  • the position of the movable ballast in the tunnel or conduit system may be controlled by a computerized means equipped with I/O ports e.g. a PLC.
  • the movable ballast comprises a plurality of movable elements adapted to be displaced independently of each other.
  • a movable ballast system comprises a plurality of movable ballast arrangements according to the first aspect or any one of its configurations.
  • the present invention may allow to increase on request and quickly, the stiffness of sailboats. Moreover, the present invention may also allow to control the heeling in order to improve comfort.
  • Fig. 1 shows a sailboat with a ballast according to the present invention in a first operational state.
  • Fig. 2 depicts a sailboat with a ballast according to the present invention in a second operational state i.e. wind abeam.
  • Fig. 3 is a chart showing the torque exerted by a movable ballast positioned 100% windward for various heeling angles.
  • Fig. 4 is a chart illustrating the dependence of the righting moment on the heeling angle of an experimental 65-foot round-bilge sailboat.
  • the stiffness and comfort of a sailboat may be improved considerably by means of a movable ballast moving in a tunnel or conduit built inside and close to the hull.
  • a set of rails or tracks may be fitted around the tunnel sides, which allows the ballast to move accurately when the boat is sailing in a rough sea.
  • the ballast may be made of a high- density material, such as lead. This allows the tunnel to be compact and it may be located under the floor and in principle may be hidden by the accommodations.
  • the stiffness may be increased by moving the ballast windward to balance a part of the heel. If so designed, the trim angle may also be corrected on the same principle.
  • the operation may be performed manually or automatically by computerized means like a PLC. In some configurations this system may be adapted to meet explosion-proof specifications.
  • a movable ballast arrangement for a vessel such as a sailboat, motorboat or ship, is located in a tunnel or conduit provided inside and preferably close to the bottom hull of the vessel.
  • the movable ballast 1 Ia to 1 Ie is located in a tunnel or a conduit 12.
  • the tunnel or conduit 12 may advantageously be composed of straight and/or a curved sections.
  • a preferred shape of the tunnel or conduit 12 is a horseshoe shape, with the tips preferably being turned backwards, as shown in Fig. 1.
  • the tunnel or conduit 12 may be built in endless loop form.
  • the tunnel or conduit 12 is built inside and close to the hull 10 and thus is, in theory, under the floors and hidden by the accommodations.
  • a set of rails or tracks may be fitted around the tunnel sides, enabling the ballast 11a to l ie to work reliably in all positions even in a harsh environment.
  • a certain level of watertightness is required for the tunnel in order to prevent intrusion of and thus obstruction by any object.
  • the ballast 1 Ia to l ie may be actuated by a mechanical force by means of e.g. a cable, a toothed belt or a chain set.
  • the cable, toothed belt or chain set may be endless.
  • the ballast 11a to l ie may advantageously be operated manually, or via a mechanical appliance. Electric or hydraulic motors may be used to apply mechanical force on the ballast 11a to l ie. In an other configuration, one or various on-board electric motors may be used, at that time the ballast 1 Ia to l ie operating like a ballast train set.
  • a train set may comprise one ballast element or a plurality of ballast elements coupled together.
  • the ballast system may be built in twin or even plural arrangement, i.e. two or more ballast train sets may be operated independently from one another in order to solve more complex balancing and/or trimming problems.
  • the system may also comprise two or more tunnels or conduits. One or more of the tunnels may be
  • the tunnel or conduit 12 can be foreseen as a pneumatic or hydraulic cylinder, and the ballast 11a to l ie provided like a two-headed piston.
  • the ballast 11a to l ie can be moved by a pressurized medium like a gas or a liquid acting on one of its faces and propel it to the desired position while releasing partially or totally the medium pressure on its other face. It is of advantage if the gaseous or liquid medium operates in a closed circuit.
  • the pistons 1 Ia to l ie of the ballast may preferably be articulated between their heads by one or several joints, with each section optionally having a set of seals.
  • the system may be managed by a computerized means equipped with I/O ports.
  • a fixed conventional inside ballast comprising about 65% of the total weight of on-board ballasts is completed by a movable ballast having the remaining weight balance.
  • the movable ballast is arranged inside a tunnel or conduit having a horseshoe shape built flush on the hull, with the tips turned backwards as shown in Fig. 1.
  • a set of tracks is fitted to the tunnel sides, enabling the ballast to move in all positions in a harsh and rolling environment.
  • the ballast weight elements are preferably made of lead and joined onto electrically driven bogies.
  • the bogies are equipped with wheels on their faces.
  • Each bogie is powered by a motor, which may advantageously be supplied by a set of three-phase current track.
  • the necessary energy is preferably provided by a bank of batteries which supply the three-phase current track through an industrial frequency generator placed in a watertight housing.
  • the tunnel is preferably under neutral atmosphere (nitrogen) in order to prevent a chemical oxidation of the mechanical and electrical components.
  • Each motor is coupled to a mechanical worm gear whose high gear reduction prevents the reversibility of the movement by the movable ballast.
  • Each reducer is geared by means of a pinion engaged on a toothed rack fixed lengthwise in the tunnel.
  • An industrial Programmable Logic Controller (PLC) placed in a watertight housing may receives data from sensors to monitor the exact position of the movable ballast.
  • An e.g. infra-red communication system may inform the PLC about the state of the motors and the reducers.
  • the PLC may permanently measure one or more of the heeling, the trimming angles, the wind direction and force, the rudder position, the speed of the boat. From these data the PLC determines the state of the sea, course and/or tack.
  • the PLC may also monitor the state of each battery and start the generator unit when necessary.
  • the autonomy time of such a system is significant, since the movable ballast does not move incessantly. Boat movements caused by the sea may be detected and filtered out by the program such that the ballast position is changed practically only when tacking.
  • the position of the ballast naturally is on the centre.
  • the ballast 1 Ia to l ie will be moved to a position at the windward side at the exact position conditioned by the heeling and trimming levels.
  • Fig. 2 shows the wind 21 on portside and the ballast 11a to l ie moved windward.
  • the balancing of the sails thrust and particularly the loading vector acting on the fore part of the boat is done simply by positioning the ballast more or less into the aft facing tips 22 of the horseshoe.
  • a touch-screen communicating with the PLC may show the system state and may allow to the skipper to modify some settings, if he wishes, as e.g. to reduce rolling of the boat.
  • the movable ballast takes its calculated position to counterbalance the heeling.
  • the movable ballast positioned 100% windward exerts its greatest force when the boat is in regular heeling angles, i.e. from 0° to about 30°. Beyond this position, the stiffness goes down to become almost nil when the boat is heeled over at 90°. When this point is reached, the righting moment is almost no longer affected by the position of the movable ballast.
  • Fig. 4 shows righting curves of an experimental round-bilge sailboat having a fin keel weighing 65% of the total weight of the solid on-board ballasts, completed by a movable ballast having the 35% remaining, ratio as defined in a preferred configuration for a 65' sailboat.
  • the boat is equipped with an extra tank ballast system having a volumetric capacity of 300% of the volume of the full movable ballast tunnel, volume corresponding as made on race sailboats.
  • Curve 41 shows the righting moment RM with the movable ballast inactive, i.e. positioned on the boat centre, or as if the boat was not equipped with it.
  • Curve 42 shows the righting moment RM with the movable ballast active, the ballast beginning to move windward as early as 3° of heel, and moving on the other side once the boat is capsized over 90 degrees.
  • Curve 43 shows the righting moment RM with the ballast tunnel inactive and the extra tank ballast system fully active, i.e. being refilled at 100% windward or yet 37% of its total volumetric capacity, the remaining percentage being positioned on the other side and aft.
  • the movable ballast system is boosting up to 325% the original righting moment from as early 3° of heeling and boost yet up to 22% at 40° of heeling, i.e. it is changing radically the efficiency of the boat which gains the same proportion of sails power without having to overload, when the tank ballast system with race characteristics brought only 96% at 3° and 9% at 40°, having to load an extra mass.
  • the advantages of this movable ballast system according to the present invention may have one or more of the following advantages:
  • the movable ballast according to the present invention may improve efficiency, the system allows to enhance stiffness, thus providing a sails power booster,
  • the operation of the system may be simplified since the PLC is managing in real time the full operation, liberating the skipper and the crew.
  • the system may be implemented in the absence of (loaded) extra mass. Absence of added drag resistance, compared to the double ballasted swinging keel systems, since there are no supplementary outside components in the seawater. No draught augmentation is required to gain the stiffness.
  • the system may be implemented in compact form and may provide improved watertightness.
  • the integration of various data collected by the PLC may allow swiftness as the reaction is immediate when tacking.
  • the watertight aspect of the tunnel and the inside components installed under an inert atmosphere allow to enhance reliability and durability.
  • the full system may easily be fitted in the accommodations.
  • the balancing of the sails thrust on the fore part of the boat may be automatically integrated.
  • the movable ballast may be used to reduce the roll tendency when sailing wind aft or when mooring, It may be facilitated to over-heel or counter- heel the boat in order to decrease the hull's wet area when sailing by light wind, If it should ever happen, the movable ballast may help to overcome the Angle of Vanishing Stability (AVS) once the boat has capsized,
  • AVS Angle of Vanishing Stability
  • the same batteries bank may be used to supply winches and windlasses too,
  • the system may equip all types of sailboats, from ballasted keelboats to all types of centreboard boats or even multihulls. Motor yachts, workboats and trawlers may also gain enhanced stability, safety and improved comfort.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

La rigidité et le confort d'un bateau à voile sont considérablement améliorés au moyen d'un ballast mobile qui se déplace dans un tunnel ou un conduit construit à l'intérieur et près de la coque. Un ensemble de rails ou de voies est fixé autour des côtés du tunnel, ce qui permet au ballast de se déplacer précisément lorsque le navire navigue sur une mer agitée. Le ballast est fait de plomb, ce qui permet que le tunnel soit compact et situé sous le plancher et, en principe, soit caché par des installations. La rigidité est augmentée en déplaçant le ballast dans la direction du vent pour équilibrer une partie de la gîte et s'il est conçu pour ça, l'angle d'assiette est également corrigé selon le même principe. L'opération est effectuée manuellement ou automatiquement par des moyens informatisés tels qu'un contrôleur à logique programmable (PLC). Dans certaines versions, ce système satisfait des spécifications anti-déflagration.
EP07803086A 2007-08-30 2007-08-30 Ballast mobile pour bateau à voile et navire Active EP2197734B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07803086T PL2197734T3 (pl) 2007-08-30 2007-08-30 Przesuwny balast dla żaglówki i statku

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/059078 WO2009026964A1 (fr) 2007-08-30 2007-08-30 Ballast mobile pour bateau à voile et navire

Publications (2)

Publication Number Publication Date
EP2197734A1 true EP2197734A1 (fr) 2010-06-23
EP2197734B1 EP2197734B1 (fr) 2013-03-06

Family

ID=39370588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803086A Active EP2197734B1 (fr) 2007-08-30 2007-08-30 Ballast mobile pour bateau à voile et navire

Country Status (6)

Country Link
EP (1) EP2197734B1 (fr)
DK (1) DK2197734T3 (fr)
ES (1) ES2413157T3 (fr)
PL (1) PL2197734T3 (fr)
PT (1) PT2197734E (fr)
WO (1) WO2009026964A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2473400B1 (fr) * 2009-09-04 2015-06-17 Itrec B.V. Installation d'un generateur eolique en haute-mer
LU91809B1 (en) 2011-04-20 2012-10-22 Vincent De Troz Mobile ballast device
DE102016207419A1 (de) * 2016-04-29 2017-11-02 Siemens Aktiengesellschaft Wasserfahrzeug und Verfahren zum Betrieb eines Wasserfahrzeuges
CA3173404A1 (fr) 2020-03-28 2021-10-07 Corcoran, Mary A. Embarcation equipee d'un systeme de ballast de batterie
DE102022212600A1 (de) 2022-11-25 2024-04-11 Zf Friedrichshafen Ag Verfahren und System zum aktiven Stabilisieren eines Wasserfahrzeugs

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698345A (en) * 1970-12-28 1972-10-17 Sperry Rand Corp Active tank stabilizer for marine vessels
NO170400C (no) * 1990-06-15 1992-10-14 Sailmatic As Avbalanseringssystem for seilbaat
FR2802504B1 (fr) * 1999-12-20 2002-03-01 Technicatome Dispositif ameliore d'equilibrage d'un navire notamment en roulis
FR2802891B1 (fr) * 1999-12-23 2002-05-03 Bernard Canal Dispositif destine a assurer une limitation de la gite des voiliers
AU2006201460B1 (en) * 2006-04-07 2007-06-21 Robert William Gale Watercraft ballast

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009026964A1 *

Also Published As

Publication number Publication date
PT2197734E (pt) 2013-06-12
PL2197734T3 (pl) 2013-09-30
WO2009026964A1 (fr) 2009-03-05
DK2197734T3 (da) 2013-05-27
EP2197734B1 (fr) 2013-03-06
ES2413157T3 (es) 2013-07-15

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