WO2003045773A2 - Systeme de mat pour voiliers - Google Patents

Systeme de mat pour voiliers Download PDF

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Publication number
WO2003045773A2
WO2003045773A2 PCT/DE2002/004301 DE0204301W WO03045773A2 WO 2003045773 A2 WO2003045773 A2 WO 2003045773A2 DE 0204301 W DE0204301 W DE 0204301W WO 03045773 A2 WO03045773 A2 WO 03045773A2
Authority
WO
WIPO (PCT)
Prior art keywords
mast
boat
sail
sailing
masts
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.)
Ceased
Application number
PCT/DE2002/004301
Other languages
German (de)
English (en)
Other versions
WO2003045773A3 (fr
Inventor
Ursula Hoffmann
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 EP02790253A priority Critical patent/EP1448432A2/fr
Priority to AU2002365286A priority patent/AU2002365286A1/en
Publication of WO2003045773A2 publication Critical patent/WO2003045773A2/fr
Publication of WO2003045773A3 publication Critical patent/WO2003045773A3/fr
Anticipated expiration legal-status Critical
Ceased 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 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • B63B15/02—Staying of masts or of other superstructures
    • 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
    • B63B2015/0025—Bipodded masts, e.g. A-type masts

Definitions

  • the invention relates to a mast system for sailboats with at least one boat hull and at least one mast, which is fixed by means of a mast foot attached to the boat hull.
  • the mast or masts are arranged in the central plane running through the longitudinal axis of the boat and point in a direction perpendicular to the deck, whereby
  • Mast and boat are rigidly connected.
  • This arrangement means that when sailing on the wind or with clear wind, the boat and thus the mast tilt to the side in the lee direction.
  • the inclination of the mast has the consequence that the sail surface opposite the wind becomes smaller, since with increasing inclination of the boat the projection of the sail surface perpendicular to the water surface decreases. This also disadvantageously reduces the propulsive force transferred from the wind to the boat.
  • the mast designs known from surfboards also belong to the state of the art.
  • the mast In these sailing vehicles, the mast is articulated to the hull by means of a mast foot.
  • This design enables the mast to be swiveled in all spatial directions in the half-space above the surfboard.
  • the free mobility of the mast enables the sail to be always positioned optimally in the direction of the wind and quick maneuvers to be carried out with the sail.
  • the surfers on the other hand must keep the mast and sail permanently in balance with the wind forces. Since he has to compensate the wind forces in full size with his own physical strength, the surfers are disadvantageously required a comparatively large amount of force.
  • the object of the invention is to provide a mast system which avoids the disadvantages of known systems mentioned, moreover leads to greater propulsive forces, therefore gives the sailboat higher speeds and thus facilitates the transition from the displacement to the sliding state.
  • the first solution is characterized in that
  • the mast foot is pivotable about an axis parallel to the longitudinal axis of the boat, and when sailing on the wind or with clear wind the mast - regardless of the heel of the boat - can be aligned approximately in the vertical direction.
  • the invention provides a pivotable mast foot which is fastened to the boat hull and receives the mast.
  • the pivoting takes place about an axis parallel to the longitudinal axis of the boat.
  • the mast and the sail attached to it can thus be pivoted in a plane perpendicular to the axis mentioned on both sides of the boat, while its distance with respect to bow and stern is essentially maintained when pivoting.
  • This version of the mast is used according to the present invention in such a way that when sailing with lateral wind, the mast is permanently held in a vertical position regardless of the heel of the boat.
  • a core idea of the invention thereby take the Opposite wind area and thus the propulsive force generated by the sail is an optimal size.
  • K F • p
  • F the area of the sail and p denotes the dynamic pressure p • v 2/2 with p the density of the flow medium and its velocity v.
  • the force standing vertically on the sail can be broken down into a component in the direction of the boat's longitudinal axis and a component perpendicular to it. If one designates the angle between the longitudinal axis of the boat and the vertical on the sail with ⁇ , the result is
  • the propulsive force points in the longitudinal direction of the boat, thus driving the boat, while the transverse force acts perpendicularly to it and causes the boat to drift sideways and the boat to heel about its longitudinal axis.
  • the equations apply to a vertical position of the mast, which, according to the invention, is assumed independently of the heeling of the boat in each case.
  • the mast system according to the present invention has a generally greater propulsive force.
  • the effective sail area is given by the complete sail area in every wind direction and at every heel. In this way, higher speeds can be achieved with boats equipped in this way than with conventionally equipped boats, without, on the other hand, as with surfing, high physical strength being required.
  • the mast foot is designed to be displaceable in the lee direction. It can therefore be moved from the position in the middle of the boat to a position on the edge of the boat in which, given the heeling of the boat, it is at a smaller distance relative to the water surface than in the middle of the boat. This also brings the mast and the sail attached to it into a comparatively low position above the water surface. Accordingly, the lever arm between the center of gravity of the sail and the at Heir effective, about the height of the water surface pivot point of the boat is reduced. For the torque which is responsible for the heeling or possibly tipping of a boat and which is given by this lever arm and the transverse force acting in the center of gravity of the sail, the result is approximately unchanged compared to the prior art
  • the mast permits pivoting beyond the vertical and can be inclined toward the windward side.
  • the bulbous shape of the sail is also used for propulsion by currents that cross the sail.
  • the gain in propulsive forces due to the suction effect outweighs the loss due to a reduction in the effective sail size due to the sail inclination in the windward direction. This results in a further gain in speed for the boats with the proposed mast arrangement.
  • a useful further development has the object that the mast foot and thus also the mast can be pivoted about the transverse axis of the boat as the axis of rotation.
  • the movement takes place in the longitudinal direction of the boat.
  • Large swivel angles are sufficient to optimally trim the boat.
  • small angle means a swivel angle below 20 °.
  • a system of two masts which are arranged symmetrically to the central plane running through the longitudinal axis of the boat and whose mast tips are inclined towards the central plane of the boat.
  • it is recommended to hoist the sail on the leeward mast.
  • the tip of the mast is inclined towards the median plane of the boat, it assumes a vertical orientation.
  • the sail surface facing the wind takes on a great value.
  • the entire length of the mast is fixed relative to the hull, so that an adjustment of the
  • the mast feet of the two masts can each be pivoted about an axis parallel to the longitudinal axis of the boat, and when sailing on the wind or with clear wind the mast lying leeward is independent of the heel of the boat can be aligned in the vertical direction.
  • the leeward mast plus sail as for the leeward movable mast according to the first solution.
  • the effective sail area is with every wind direction and with every one
  • a rigid sail is pivotably attached in the area of each mast tip via a joint.
  • this rigid sail due to its geometric design, acts like an airfoil, i.e. that the flow path and thus the flow speed of the surrounding air develop on both sides of the sail at different values, so that a comparison of both sides of the sail creates a pressure difference which exerts a force effect on the sail itself.
  • the attachment via a joint on the mast is crucial. To ensure a largely free mobility of the sail, the attachment in the area of the outer end of the mast must take place in the area of the mast tip.
  • the attachment via a joint ensures the relative pivotability of the sail relative to the mast, the setting of a particular sail being completely independent of the neighboring one.
  • the wing facing the wind i.e. on the windward side, is aligned essentially vertically, so that in relation to the mast, an arrangement of the sail is obtained which - apart from the rigidity of the wing - can be achieved with conventional sailing boats, especially small sailing boats, such as Dinghies or yachts, a comparable spatial arrangement results.
  • this sail is used to generate propulsion.
  • the other sail, and therefore the wind-facing sail, the leeward sail is, however, aligned essentially horizontally, so that a pronounced wing effect is formed, which results in buoyancy.
  • the advantages to be achieved in this way are particularly evident in the case of more multihull boats.
  • the mast system according to the invention can advantageously be used on a boat with a boat hull, such as a yacht or a dinghy, but it is also suitable for use on a boat with several boat hulls, such as a catamaran or a trimaran.
  • the present invention provides both uses.
  • Another proposal according to the present invention also serves the goal of improved stability. This provides, on both sides of the boat body, preferably retractable floating bodies, the exit of which in the
  • the floating bodies increase the safety of the boat against tipping over, the stability increasing with increasing distance between the floating bodies and the actual boat body.
  • sailing boat in the sense of this application is to be interpreted broadly and includes not only sailing boats in the narrower sense, ie those that are in contact with water, but also those vehicles that are moved by land with wind power. These include ice sailers moving on ice surfaces as well Sand sailors that move over a sandy area by means of a landing gear under the influence of wind power. Further details, features and advantages of the invention can be found in the following part of the description. In this part, an embodiment of the mast system according to the invention is explained in more detail with reference to a drawing. Show it:
  • Figure 1 a cross section through a boat with the mast system according to solution one
  • Figure 2 a cross section through a boat with the mast system according to solution two.
  • FIG. 1 a sailboat according to solution one is shown that sails on the wind.
  • the direction of travel of the boat points out of the plane of the drawing, the direction of the wind is given by arrow 1.
  • the boat is equipped with a mast 2, which is moved leeward out of the central plane 3 of the boat hull 4 in the direction of the boat edge 5.
  • the displacement device is to be indicated by the bolt 6 and the parallel slide rails 7.
  • the mast is articulated on its base 8 and is designed to be pivotable about the bolt 6 in a plane perpendicular to the longitudinal axis 9 of the boat.
  • the pivoting takes place in the windward direction and is adjusted so that the mast 2 assumes a vertical orientation regardless of the heel of the boat hull 4.
  • the mast is held by a bracing 10.
  • the effective area of the sail 11 corresponds to the complete sail size, this relationship being independent of the heel of the boat hull 4. This also maximizes the propulsive force exerted by the wind on the sail, with such
  • the off-center position of the mast also leads to the mast 2 and the sail 11 attached to it being a comparatively low position above the
  • the mast arranged according to the invention has a mast base 8 lying lower by the distance 13.
  • the distance 14 of the center of gravity 15 of the sail 11 from the water surface 12 is compared to a conventional arrangement of the Mastes downsized.
  • the torque from this distance 14 and the transverse force acting in the center of gravity, which is responsible for the heeling of the boat and in extreme cases for the boat tipping, remains approximately unchanged in the proposed arrangement of the mast, since the decrease in the lever arm 14 increases the transverse force in the present
  • FIG. 2 shows the variant of the mast system with two inclined individual masts 2, 2 'again. Both masts are arranged symmetrically to the central plane 3 running through the longitudinal axis 9 of the boat, with their
  • the illustration shows a boat sailing with aft wind, the direction of travel and the wind direction are assumed to point perpendicular to the plane of the drawing.
  • a further sail 11 ′′ is provided between the two masts.
  • the sails 11, 11 ′ and 11 ′′ overall represent a comparatively large sail area, which enables a fast journey against the wind. If necessary, in addition to these sails, the one that is often used when sailing in front of the wind can also be used without any problems.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)
  • Toys (AREA)

Abstract

L'invention concerne un système de mât pour voiliers comprenant au moins une coque (4) et au moins un mât (2) qui est fixé au moyen d'un pied de mât fixé à la coque. Deux possibilités sont offertes : a) le pied de mât (8) peut osciller autour d'un axe parallèle à l'axe longitudinal (9) du voilier, et, pendant le déplacement à la voile du bateau ou sous l'effet de l'air ambiant, le mât (2) peut être toujours orienté sensiblement dans le sens vertical ; b) deux mâts (2, 2') sont disposés symétriquement par rapport au plan central (3) du bateau coupant l'axe longitudinal (9), et soit les deux sommets de mât (16, 16') sont inclinés en direction du plan central (3) du bateau, soit une voile rigide (= surface portante) est fixée par l'intermédiaire d'une articulation dans la zone desdits sommets de mât.
PCT/DE2002/004301 2001-11-24 2002-11-22 Systeme de mat pour voiliers Ceased WO2003045773A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP02790253A EP1448432A2 (fr) 2001-11-24 2002-11-22 Systeme de mat pour voiliers
AU2002365286A AU2002365286A1 (en) 2001-11-24 2002-11-22 Mast system for sailing boats

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001157730 DE10157730A1 (de) 2001-11-24 2001-11-24 Mastsystem für Segelboote
DE10157730.3 2001-11-24

Publications (2)

Publication Number Publication Date
WO2003045773A2 true WO2003045773A2 (fr) 2003-06-05
WO2003045773A3 WO2003045773A3 (fr) 2003-09-18

Family

ID=7706875

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/004301 Ceased WO2003045773A2 (fr) 2001-11-24 2002-11-22 Systeme de mat pour voiliers

Country Status (4)

Country Link
EP (1) EP1448432A2 (fr)
AU (1) AU2002365286A1 (fr)
DE (1) DE10157730A1 (fr)
WO (1) WO2003045773A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877913A1 (fr) 2004-11-16 2006-05-19 Lionel Serge Michel Julliand Greement trapeze

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE195022C (fr) *
FR1415601A (fr) * 1964-07-21 1965-10-29 Mât compensateur de gîte pour voiliers de toutes catégories
FR2210976A5 (fr) * 1972-12-15 1974-07-12 Andrieu Robert
US3903827A (en) * 1974-07-15 1975-09-09 Paul M Marcil Non-heeling hull assembly
FR2337077A1 (fr) * 1975-12-29 1977-07-29 Dauphin Francis Greement mobile pour catamaran
US4094263A (en) * 1976-07-19 1978-06-13 Marcil Paul M Heel compensation system
US4273060A (en) * 1980-03-26 1981-06-16 Ivan Pavincic Sailing vessel
FR2503656A1 (fr) * 1981-04-09 1982-10-15 Jaures Jacques Engin a propulsion eolienne muni d'un greement inclinable au vent
DE3338491A1 (de) * 1983-10-22 1985-05-09 Reinhold 3006 Burgwedel Titau Segelanordnung fuer wasserfahrzeuge
DE3421583A1 (de) * 1984-06-09 1984-12-20 Hans-Arnim Dipl.-Ing. Stolpe (TU), 6222 Geisenheim Wassersegelgleiter
DE3506900A1 (de) * 1985-02-27 1986-10-16 Gernot 5804 Herdecke Kloss Schwenkvorrichtung fuer segelmaste
FR2579557B1 (fr) * 1985-03-29 1990-07-20 Guillerm Herve Mat inclinable et reglable pour tous types de bateaux et engins mus par le vent
WO1989007546A1 (fr) * 1988-02-09 1989-08-24 Denis Charles Nelson Appareil d'inclinaison du mat pour petites embarcations a voiles
FR2637562B1 (fr) * 1988-10-12 1994-11-18 Naslin Francois Greement mobile pour un engin a voile, et engin a voile pourvu d'un tel greement
US5054411A (en) * 1990-03-14 1991-10-08 Nelson Victor A High performance sailing craft
DE4119946A1 (de) * 1991-06-18 1993-01-07 Juergen Kindler Rigg mit doppelmast und doppelsegel
DE19528796A1 (de) * 1995-08-04 1997-02-06 Klaus Ketterer Verfahren zum Betreiben eines Segelschiffes und Segelschiff
FR2770483B1 (fr) * 1997-10-30 1999-12-10 Gilbert Leblanc Voilier de course ou de croisiere a mat implante
FR2778386A1 (fr) * 1998-05-06 1999-11-12 Alexis Defarge Double mature en parallele pour voiliers multicoques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877913A1 (fr) 2004-11-16 2006-05-19 Lionel Serge Michel Julliand Greement trapeze

Also Published As

Publication number Publication date
DE10157730A1 (de) 2003-06-05
EP1448432A2 (fr) 2004-08-25
WO2003045773A3 (fr) 2003-09-18
AU2002365286A1 (en) 2003-06-10

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