NZ748636A

NZ748636A - Pleasure craft

Info

Publication number: NZ748636A
Application number: NZ748636A
Authority: NZ
Inventors: Christopher Edward Bangle
Original assignee: Sanlorenzo S P A
Priority date: 2016-06-15
Filing date: 2017-06-07
Publication date: 2021-03-26
Also published as: BR112018076170A2; WO2017216684A1; MX2018015395A; RU2706759C1; KR102279527B1; AU2017286768B2; EP3472034A1; ES2805033T3; ITUA20164403A1; PL3472034T3; CN109328160A; CN109328160B; AU2017286768A1; DE202017007156U1; KR20190018430A; EP3472034B1; BR112018076170B1

Abstract

The present invention relates to a pleasure craft (1), and more particularly to a luxury pleasure craft, such as a yacht. The craft (1) according to the invention comprises a hull (3), a deck (5) and a superstructure (7) arranged on said deck in an asymmetrical position with respect to the symmetry plane (L) of the craft, thus leaving a free lateral passageway (9) on said deck. In order to provide the craft with a substantially symmetrical aerodynamic profile and to hide the asymmetrical arrangement of said superstructure (7), the craft (1) according to the invention comprises at least one bulkhead (11) which is arranged and sized so that the craft offers to the air and to the eye of an observer a symmetrical and substantially continuous front surface in the navigation direction. Thanks to the invention, all the practical advantages deriving from the asymmetrical arrangement of the superstructure (7) can be fully exploited, while maintaining a good directional stability and a pleasant and prestige appearance.

Description

"Pleasure craft" DESCRIPTION cal Field The present invention s to a pleasure craft.

More particularly, the present invention relates to a luxury pleasure craft, such as a yacht.

Prior Art Pleasure crafts are known which se a hull and a deck, on which a superstructure is provided, which can accommodate, for instance, the passenger cabin and/ or the pilot house for the shipowner.

In some known types of crafts, the aforementioned superstructure s over the whole transverse width of the deck, so that the side walls of said tructure are substantially aligned with the hull on both sides of the craft.

This configuration (also known as "Full Beam") has the advantage that it allows to maximize the space inside the superstructure, thus allowing to obtain larger and more comfortable nments.

However, as the superstructure extends over the whole width of the deck, this involves the need of passing through it or above it for moving from the deck stern to the deck bow, or vice versa. This is a major drawback, both from the point of View of cality and from the point of view of users’ privacy, particularly when the superstructure accommodates a passenger cabin.

In other known types of crafts, the superstructure has a width smaller than that of the deck, so that lateral passageways or corridors are obtained on both sides of said superstructure, between its side walls and the side walls of the craft.

This second configuration (also known as "Walk Around") has the advantage that it allows to easily move from the stern to the bow of the deck, without the need of passing through the superstructure.

On the other hand, it involves a significant reduction in terms of space that can be utilized inside the superstructure with respect to a "Full Beam" configuration.

W0 2017l216684 In order to find a compromise between the two above—disclosed configurations, it is possible to provide one lateral passageway only for moving from the deck stern to the deck bow while ing outside the superstructure: at one of the ﬂanks of the craft, the lateral wall of the superstructure will be substantially ﬂush with the hull; on the contrary, at the te ﬂank of the craft, the superstructure will end before reaching the hull, leaving a free corridor on the deck between the opposite lateral wall of the tructure and the side wall of the craft.

This compromise on on one hand allows greater practicality when moving from one area to the other area of the deck and on the other hand it provides — for a given size of the deck — a space inside the superstructure larger than in the case of a "Walk Around" configuration.

Pleasure crafts comprising a superstructure designed in this way are disclosed, for instance, in documents WC 2013/O34935 and US 4 064 584.

However, even this solution is not free from cks.

In particular, the asymmetrical arrangement of the superstructure with respect to the hull involves an aerodynamic imbalance, since the craft has a frontal surface exposed to the air in the direction of navigation that is not rical with respect to the hull, with the consequent formation of different turbulences on the two te sides of the hull.

Consequently, rather than advancing straight forward, the craft has the tendency to turn towards the side on which the superstructure is ed, i.e. towards the side on which it offers a greater resistance to the air. Consequently, in order to keep the ship advancing straight ahead, continuous corrections on the craft wheel are required.

The higher the navigation speed is, the more evident is this disadvantage.

Moreover, the larger the craft size is, the more t is this disadvantage.

Such disadvantage is to be avoided especially in luxury pleasure crafts (such as yachts), in which the high selling price should guarantee optimal performances.

Moreover, if the craft is provided with a ﬂying bridge over the W0 2017l216684 superstructure, the asymmetrical arrangement causes said ﬂying bridge to be cantilevered on the side of the lateral passageway, which can lead to possible ena of pressure ﬂuctuations which have to be suppressed either by increasing the bearing structures, which would be penalizing in terms of weight, or by adding separate ts (stanchions) which would be unaesthetic.

Still, the asymmetrical arrangement of the superstructure with respect to the hull gives the craft a rough, awkward overall structure, which means an unpleasant appearance.

The asymmetrical arrangement cannot be evidently perceived when the craft is viewed from the side. On the other hand, it is evident when the craft is viewed frontally or from behind, for instance when the craft is berthed, with its bow or stern towards the pier.

Also in this case, this disadvantage has a remarkable importance in the case of yachts and similar luxury re crafts, in which appearance is one of the parameters determining the success (or failure) of a model on the market.

As a result, despite the practical advantages that can be obtained, a solution providing for an asymmetrical arrangement of the superstructure with respect to the deck is impracticable, at least as far as the application to luxury crafts such as yachts is concerned, in which high standards are ed both from the technical point of view and from the tic point of View.

The main object of the present ion is to overcome the drawbacks of the prior art by providing a pleasure craft that allows to combine advantageous practical solutions with directional stability during navigation and a ng and attractive appearance.

This and other objects are achieved by the pleasure craft as claimed in the appended claims.

Summary oi the Invention The pleasure craft according to the invention comprises a hull and a deck on which a superstructure is provided, which superstructure is ed asymmetrically with respect to the symmetry plane — i.e. the plane W0 2017l216684 arranged in the bow — stern ion — of said craft, so that at a first ﬂank of the craft the lateral wall of the tructure is substantially ﬂush with the hull, while at the second, opposite ﬂank a free passageway or corridor is left on the deck between the lateral wall of the superstructure and the side wall of the craft.

Thanks to the fact that the invention provides for at least one bulkhead extending from said second ﬂank of the hull in a direction substantially transverse to the symmetry plane of the craft and having a suitably chosen width, the front surface offered to the air in the direction of navigation does not substantially comprise any gap between said bulkhead and said tructure.

By virtue of such solution, any imbalance (even minimal) in the aerodynamic profile of the craft is compensated, and the craft shows no tendency to deviate from the predetermined route during navigation.

Furthermore, always thanks to the bulkhead ing to the invention, when an observer looks at the craft in a direction parallel to the symmetry plane of the craft , due to such solution, the optical effect on the observer is that of a substantially symmetrical overall ure.

Therefore, thanks to the invention, the asymmetrical arrangement of the superstructure does not adversely affect either the aerodynamic profile or the aesthetic ance of the craft and all the practical advantages resulting from this arrangement can be fully exploited while maintaining a directional stability during navigation (without the need for continuous corrections) and a prestige ance.

Said at least one bulkhead is substantially coplanar to one of the transverse walls of the superstructure, in particular the transverse wall on the bow side.

In this way, the bulkhead acts as a deﬂector and gives, at its side of the hull, an aerodynamic behavior completely similar to that provided by the superstructure at the opposite side of said hull, thus eliminating (or at least cally reducing) the imbalance in the aerodynamic profile.

In a preferred embodiment of the invention, said at least one ad is substantially "L"—shaped and comprises a first wall arranged substantially W0 2017l216684 coplanar to one of the transverse walls of the superstructure, namely the transverse wall on the bow side, and a second wall arranged substantially orthogonal to the first wall and extending along the ﬂank of the hull, towards the center of the superstructure.

Indeed, experimental tests have shown that a bulkhead provided only with the first wall substantially coplanar to one of the erse walls of the superstructure may not be sufficient for suppressing the tendency of the craft to e from the predetermined route, whereas in the case of a "L"—shaped bulkhead, the second wall extending along the ﬂank of the hull effectively contributes to guarantee a satisfactory aerodynamic profile.

In a preferred embodiment of the invention, two bulkheads are provided, one of which is ntially coplanar to the transverse wall of the superstructure on the bow side and the other one of which is substantially coplanar to the transverse wall of the superstructure on the stern side.

In a particularly preferred variant of said embodiment, both said bulkheads are substantially "L"—shaped and comprise a first wall substantially ar to the corresponding transverse wall of the superstructure and a second wall substantially orthogonal to the first wall and extending along the ﬂank of the hull, towards the center of the superstructure.

In a preferred embodiment of the invention, a ﬂying bridge is provided over the superstructure, said ﬂying bridge extending transversely across the whole width of the , from ﬂank to ﬂank of the craft: thanks to the presence of such ﬂying bridge the asymmetrical arrangement of the superstructure is not visible when the craft is seen from above.

Advantageously, when a ﬂying bridge is provided, the at least one bulkhead of the craft according to the invention plays an important structural role, since it supports the side of the ﬂying bridge opposite to that on which the tructure is arranged: in the absence of such a ad, the ﬂying bridge would be cantilevered on the underlying wer) superstructure, which would result in erable bending W0 2017l216684 stresses or in the need of increasing the bearing ures, which would be penalizing in terms of weight, or of adding hetic, separate uprights.

Brief Description oi the Drawings Further features and advantages will be more evident from a detailed description of some preferred embodiments of the invention, given by way of non—limiting example with reference to the ed drawings, in which: Figure 1 is a schematic perspective View of a re craft according to a first embodiment of the invention; Figure 2 is a further schematic perspective view of the craft of Figure 1, seen from a different ion; Figure 3 is a plan view of the craft of Figures 1 and 2; Figure 4 is a front view of the craft of Figures 1 and 2; Figure 5 is a schematic perspective view of a re craft according to a second embodiment of the invention; Figure 6 is a plan view of the craft of Figure 5, in which the ﬂying bridge has been removed for sake of clarity.

Detailed Description of Some Preferred Embodiments Referring to Figures 1 to 4, a pleasure craft according to a first embodiment of the invention is shown, which craft is indicated as a whole by reference 1.

The craft 1 comprises a hull 3 in which a bow 3a, a stern 3b, and two ﬂanks 3c, 3d connecting the bow 3a and the stern 3b on opposite sides of the hull 3 are defined.

The craft 1 also comprises a deck 5 on which a superstructure 7 is provided, which is intended to accommodate one or more passenger cabins and/ or a pilot house for the shipowner.

According to the invention, the superstructure 7 is arranged on the deck 5 in an asymmetrical position with respect to the symmetry plane L of the craft 1, i.e. the plane which is dicular to the deck 5 and passes h the bow 3a and the middle point of the stern 3b. In particular, the outer perimeter of said superstructure 7 comprises: a first lateral wall W0 2017l216684 7c extending over a certain length along a first ﬂank 3c of the hull between the bow and the stern, substantially aligned with said first ﬂank of the hull; a first transverse wall 7a extending from the cing end of said first lateral wall 7c in a direction substantially transverse to the symmetry plane L of the craft; a second transverse wall 7b ing from the stern—facing end of said first l wall 7c in a direction substantially transverse to the symmetry plane L of the craft; a second lateral wall 7d joining the ends of the transverse walls 7a, 7b opposite to those connected to the first lateral wall 7c.

The distance between the lateral walls 7c, 7d of the superstructure 7 — or, in other words, the width W' of the superstructure 7 — along an axis transverse to the symmetry plane L of the craft is, at each point of the superstructure, smaller than the distance n the ﬂanks 3c, 3d of the hull 3 — or, in other words, than the width W of the deck 5 — along an axis transverse to the symmetry plane L of the craft, so that a free lateral passageway 9 is left on the deck 5 between the second lateral wall 7d of the superstructure 7 and the second ﬂank 3d of the hull 3. Said lateral passageway will have a width ient for allowing at least the passageway of an individual.

In any case, in order to obtain enough space within the superstructure 7, said superstructure will extend - in a direction perpendicular to the symmetry plane L — from the first ﬂank 3c of the hull to the second ﬂank 3d of the hull beyond said symmetry plane, at least along a substantial portion of its length.

Moreover, for the reasons that will become apparent later, preferably the superstructure 7 has not a uniform width in the direction perpendicular to the symmetry plane L of the craft, but has a reduced width, i.e. it is d, at least at one of its ends in the longitudinal direction.

More particularly, in the red ment shown in Figures 1 to 4, the superstructure 7 ses a portion with a reduced width at its end facing the bow of the craft. Correspondingly, the width of the first transverse wall 7a is smaller than the width of the second transverse wall 7b in a direction transverse to the symmetry plane L of the craft and the W0 2017l216684 second lateral wall 7d comprises a first n 7d’ extending from the end of the second transvers wall 7b in a direction substantially parallel to the symmetry plane L of the craft and a second portion 7d" extending in an oblique direction and joining the first portion 7d’ of the second lateral wall 7d to the first transverse wall 7a. In other words, the plan of the superstructure 7 has the shape of a rectangle with a superimposed scalene trapezoid having its smaller base facing the bow (see Figure 3).

This configuration is not to be intended as limiting and several different ts are possible. For ce, instead of being formed by two differently ed portions, the second lateral wall 7d of the tructure 7 could have a profile curved towards the bow.

In general, the first transverse wall 7a will have a width along an axis perpendicular to the ry plane L smaller than the maximum width W" of the superstructure 7, i.e. to the maximum distance between said first and second lateral walls of said superstructure along an axis perpendicular to the symmetry plane L.

From the above, it is evident that the re craft 1 according to the invention has an overall structure which is strongly trical.

Such asymmetry is relevant When the craft is viewed frontally (or from ), i.e. in a direction parallel to the symmetry plane L (direction bow — stern).

As mentioned above, the asymmetrical arrangement of the superstructure 7 involves relevant practical advantages and, in particular, allows to se the space available inside said structure if compared with a symmetrical arrangement with lateral passageways on both sides ("Walk Around" configuration). Specifically, for the same size of the deck, in the craft according to the invention the space inside the superstructure 7 can be 12 — 15% larger than in a "Walk Around" configuration.

However, the asymmetrical arrangement of the superstructure 7 causes an imbalance from the aerodynamic point of View, since the portion of the craft between the symmetry plane L and the side 3c of the hull 3 (i.e. the portion completely ed by the superstructure 7) offers a significantly higher resistance to air than the portion of the craft between the W0 2017l216684 symmetry plane L and the opposite side 3d of the hull 3 (i.e. the portion only partially occupied by the superstructure 7) and different turbulences are created at the two opposite sides of the hull; the higher the craft speed is and the larger the craft size is, the more relevant are the effects of such imbalance.

Moreover, the asymmetrical arrangement of the tructure 7 gives the craft 1 an awkward profile and generates in the observer an unpleasant impression from the aesthetical point of view.

In order to eliminate this imbalance in the aerodynamic profile and to hide the asymmetrical arrangement of the superstructure 7, the pleasure craft 1 according to the invention provides for the presence on the deck 5 of a bulkhead 11 which ses at least a first wall 11a extending from the second ﬂank 3d of the hull 3 in a direction ntially transverse to the symmetry plane L of the craft 1 and substantially coplanar to the first transverse wall 7a of the superstructure 7 and having such a width that the distance d of the end of said first wall 11a of said bulkhead 11 adjacent to the first transverse wall 7a of the superstructure 7 from the symmetry plane L of the craft is equal to or smaller than the maximum distance d’ of the second lateral side 7d of the tructure 7 from said symmetry plane L.

The height of the first wall 11a of the bulkhead 11 is preferably substantially equal to the height of the walls 7a — 7d of the superstructure 7.

Thanks to this solution, when the craft 1 is viewed frontally, there is no gap between the wall 11a of the ad 11 and the superstructure 7, said ad acts as a deﬂector and the craft offers to the air a symmetrical, substantially continuous impact surface, thus ating any imbalance in the namic profile and giving, as a result, directional stability to the craft.

Moreover, the presence of the bulkhead 11 s the impression of strong asymmetry in the observer and generates a more pleasant impression in such observer.

Considering the presence of the bulkhead 11, it will be evident to the W0 2017l216684 person skilled in the art why the superstructure 7 has a portion with a reduced width at its bow—facing end, i.e. near said first transverse wall 7a: thanks to this configuration, the lateral passageway 9 continuously extends from the stern to the bow, without the need of providing doors or passages in the first wall 11a of the bulkhead 11. More ularly, said lateral passageway 9 comprises a first portion 9’ ing along the first portion 7d’ of the second l wall 7d, in a direction substantially el to the symmetry plane L of the craft, and a second portion 9" ing along the second portion 7d" of the second lateral wall 7d, in an oblique direction; the opening 9a of the lateral passageway 9 towards the bow, which extends between the first transverse wall of 7a of the superstructure 7 and the first wall 11a of the bulkhead 11, will be at a distance from the symmetry plane L of the craft smaller than the maximum distance between said symmetry plane L and the second lateral wall 7d of the superstructure 7.

Advantageously, as can be seen in Figure 3, the opening 9a of the lateral passageway 9 is in a central position with respect to the ion transverse to the symmetry plane L (i.e. e said symmetry plane), which further contributes to suppress asymmetries in the aerodynamic profile of the pleasure craft 1.

As can be seen in Figure 4, notwithstanding the asymmetrical arrangement of the tructure 7, when considering the pleasure craft 1 according to the invention frontally, it will be appreciated that it offers the best possible approximation of a uous front surface, formed by — in sequence — the first transverse wall 7a of the superstructure 7, the second portion 7d" of the second lateral wall 7d of said superstructure (visible behind the g 9a of the lateral passageway 9) and the first wall 11a of the bulkhead 11.

The opening 9a of the lateral passageway 9 could be provided with a door (e.g. a sliding door or a swinging door) for increasing the symmetry of the structure.

In the preferred embodiment shown in Figures 1 to 4, the bulkhead 11 has a substantially "L"—shaped profile and comprises — besides the first W0 2017l216684 wall 11a — a second wall 11b extending along the second ﬂank 3d of the hull 3, in a direction substantially onal to said first wall 11a and towards the stern 3b.

The presence of said second wall 11b contributes to "accompany" the air ﬂow along the ﬂank 3d of the hull, symmetrically to what occurs along the opposite ﬂank 3c of the hull by virtue of the presence of the lateral wall 7c of the superstructure 7.

Moreover, said second wall 11b can advantageously hide the presence of an access door (not shown in the Figures) to the superstructure 7 in the second portion 7d" of the second lateral wall 7d to an external observer viewing the craft from the side.

Preferably, the bulkhead 11 will further se a third wall 11c extending parallel to the second portion 7d" of the second lateral wall 7d of the tructure 7 and joining the free ends of said first and second walls 11a, 11b of said bulkhead.

Thanks to this arrangement, the free lateral passageway 9 will have a substantially uniform width over its entire length.

Moreover, the volume ed by walls 11a — 11c of the bulkhead 11 can advantageously be used as storage space, for instance for ng equipment and/ or safety equipment.

In the embodiment shown in s 1 to 4, the craft 1 further comprises a overhead bridge or ﬂying bridge 13 covering the superstructure 7 and extending in a direction transverse to the symmetry plane L of the craft, across the whole width of the deck 5.

Thanks to the presence of this ﬂying bridge 13, the asymmetrical arrangement of the superstructure 7 is not visible when the craft 1 according to the invention is seen from above.

Advantageously, in this embodiment the ad 11 acts as a support for the ﬂying bridge 13, close to its bow—facing end, on the side of the deck opposite to that along which the superstructure 7 is arranged. An t can be provided for supporting the ﬂying bridge 13 close to its stern- facing end.

In this embodiment, the bulkhead 11 plays an important structural role, W0 2017l216684 since in its absence the ﬂying bridge 13 would be cantilevered on the underlying superstructure 7, which would involve relevant bending stresses or the need of increasing the bearing structures, with a consequent increase in weight, or of adding unaesthetic, separate uprights.

In a preferred embodiment of the invention, the bulkhead 11 is permanently, fixedly mounted on the deck 5.

However, in an alternative embodiment of the invention, said ad could be y, or even removably, d on the deck 5.

With nce now to Figures 5 and 6, a second embodiment of the re craft 1 according to the invention is schematically shown.

Said second embodiment differs from the usly described embodiment in that it es for two bulkheads 11, 21, one at the bow— facing end of the superstructure 7 and the other one at the stern—facing end of the superstructure 7.

Thanks to the presence of said two bulkheads, the craft will offer a substantially continuous surface both at its bow and at its stern and the optical sion of a symmetrical surface will be very strong, both when viewing the craft frontally and when g it from behind.

In this second embodiment, too, the superstructure 7 is arranged on the deck 5 in an trical position and the width of the tructure 7 in a direction transverse to the symmetry plane L of the craft — i.e. the maximum distance between the lateral walls 7c, 7d of said superstructure — is, at each point of the superstructure 7, smaller than the width of the deck 5 in a direction transverse to the symmetry plane L of the craft, whereby a free lateral passageway 9 is left between the second lateral wall 7d of the superstructure 7 and the second ﬂank 3d of the hull 3.

In this embodiment, the superstructure 7 comprises a first portion with reduced width at its bow—facing end and a second portion with reduced width at its stern—facing end. Correspondingly, the second lateral wall 7d of said superstructure comprises a first, middle portion 7d’ extending in a direction substantially parallel to the symmetry plane L of the craft, a second portion 7d" extending in an oblique direction and joining the first W0 2017l216684 portion 7d’ of the second lateral wall 7d to the first transverse wall 7a and a third portion 7d"’ extending in an oblique direction and joining the first portion 7d’ of the second lateral wall 7d to the second transverse wall 7b.

In this ment, on the deck 5 a first bulkhead 11 is provided, which comprises at least a first wall lla, substantially coplanar to the first transverse wall 7a of the superstructure 7 and extending from the second ﬂank 3d of the hull 3 in a direction substantially transverse to the symmetry plane L of the craft 1 and having such a width that the distance of the end of said first wall 11a of said bulkhead 11 adjacent to the first transverse wall 7a of the superstructure 7 from the symmetry plane L of the craft is equal to or smaller than the maximum distance of the second lateral wall 7d of the superstructure 7 from said symmetry plane L; on the deck 5 a second bulkhead 21 is r provided, which comprises at least a first wall 21a, substantially coplanar to the second transverse wall 7b of the superstructure 7 and extending from the second ﬂank 3d of the hull 3 in a direction substantially transverse to the symmetry plane L of the craft 1 and having such a width that the distance of the end of said first wall 21a of said bulkhead 21 adjacent to the second erse wall 7b of the superstructure 7 from the symmetry plane L of the craft is equal to or smaller than the maximum distance of the second lateral wall 7d of the superstructure 7 from said symmetry plane L.

The height of the first walls 11a, 21a of said bulkheads 11, 21 is preferably equal to the height of the walls 7a — 7d of the superstructure 7.

Therefore, the lateral eway 9 will continuously extend from the stern to the bow and comprise a middle portion 9’ extending in a direction ntially parallel to the symmetry plane L of the craft, and oblique portions 9", 9’" extending along the second and third portions 7d", 7d’", respectively, of the second lateral wall 7d. The openings 9a, 9b of the l eway 9 towards the bow and the stern will be at a distance from the symmetry plane L of the craft smaller than the m distance n said second lateral wall 7d of the superstructure 7 and said symmetry plane L.

As a result, notwithstanding the asymmetrical arrangement of the W0 2017l216684 superstructure 7, the observer viewing the pleasure craft 1 according to the invention frontally or from behind will get the impression of a continuous surface.

In this embodiment, too, each bulkhead 11, 21 has a substantially "L"— shaped profile and comprises — s the first wall 11a, 21 — a second wall 11b, 21b, extending along the second ﬂank 3d of the hull 3, in a direction substantially orthogonal to said first wall 1 la, 11b and towards the center of the superstructure 7, i.e. towards the stern and towards the bow, tively. Preferably, each bulkhead 11, 21 will further comprise a third wall 11c, 21c joining the free ends of the walls of each corresponding bulkhead and defining a corresponding enclosed volume which can be advantageously used as storage space.

In this embodiment, too, the bulkheads 11, 21 are permanently, fixedly mounted on the deck 5, but in an alternative ment they could be movably, or even removably, d on the deck 5.

If the craft 1 comprises a ﬂying bridge 13 covering the superstructure 7 and extending in a direction erse to the symmetry plane L of the craft across the whole width of the deck 5, the bulkheads 11, 21 act as supports for the ﬂying bridge 13, both at the stern and at the bow, so that the ﬂying bridge is not cantilevered on the underlying superstructure and there is no need for the presence of separate uprights or for an increase in the bearing structures, with a consequent increase of weight.

With particular reference to Figure 6, some preferred tions between the different elements of the craft according to the invention (more particularly n the tructure 7 and the bulkheads 11, 21) are provided, which tions should in no way be intended as limiting: — the ratio between the distance of the end of the first transverse wall 7a of the superstructure 7 from the symmetry plane L (segment ED in Figure 6) and the corresponding distance of the second ﬂank 3d of the hull 3 from said symmetry plane L nt EB in Figure 6) is comprised between 0,3 and 0,6; said ratio can be considered as an "asymmetry index" of the configuration of the craft according to the invention; W0 2017l216684 the minimum width of the first wall 11a of the bulkhead 11 is equal to the distance between the second ﬂank 3d of the hull 3 and the projection of the point farthest from the symmetry plane L of the second lateral wall 7d of the superstructure 7 (A) on said first wall 11a of the bulkhead 11 and therefore corresponds to segment AB in Figure 6; the width of the first wall 11a of the bulkhead 11 (segment CB’ in Figure 6) is preferably equal to said minimum width plus a so—called "covering factor" (segment CA’ in Figure 6); said "covering factor" (segment CA’ in Figure 6) is preferably equal to 15 — 40% of the distance between the end of the first transverse wall 7a of the superstructure 7 and the projection of the point farthest from the ry plane L of the second lateral wall 7d of the superstructure 7 (A) on the first wall 11a of the bulkhead 11 (segment DA’ in Figure 6); the angle ed between the second oblique portion 9" of the lateral passageway 9 and the first portion 9’ of said lateral passageway — i.e. and the symmetry plane L of the craft 1 — is preferably equal to 20 — 45°; the ratio between the width b1 of the second oblique portion 9" of the lateral passageway 9 and the width b of the first n 9’ of said lateral passageway is preferably comprised n 0,9 and 1,1.

Similar proportions can also be ed for the second bulkhead 21.

It will be evident from the above that the pleasure craft according to the ion allows to achieve the objects set forth above and combine the practical ages deriving from an asymmetrical arrangement of the tructure with a substantially symmetrical aerodynamic profile and a good directional stability and a pleasant appearance.

It will also be evident to the person skilled in the art that the detailed description provided above has been given by way of non—limiting example and several modifications and variants are le without departing from the scope of protection as defined by the appended claims.

Claims

1. Pleasure craft, comprising: - a hull, including a bow, a stern, a symmetry plane (L) and two flanks ting said bow to said stern on opposite sides of said hull relative to the symmetry plane (L); - a deck substantially perpendicular to the symmetry plane; - a superstructure arranged on said deck, an outer perimeter of said superstructure comprising a first lateral wall ing over a first flank of said hull in a direction substantially parallel to the symmetry plane (L) of said pleasure craft and is substantially aligned with said first flank of said hull, a first transverse wall extending from an end of said first lateral wall facing towards the bow in a plane substantially transverse to the ry plane (L) of said re craft, a second transverse wall extending from an end of said first lateral wall facing towards the stern in a plane substantially transverse to the symmetry plane (L) of said pleasure craft, and a second l wall connecting ends of said first and second transverse walls opposite to ends thereof connected to said first lateral wall, wherein a width (W’) between said first and said second lateral walls of said superstructure along an axis perpendicular to the symmetry plane is smaller than a width (W) between said first and said second flanks of said hull along the same axis, a lateral passageway being thus defined n said second lateral wall of said superstructure and said second flank of said hull, wherein a width along an axis perpendicular to the ry plane of at least said first transverse wall of the superstructure is smaller than a maximum width (W”) between said first and said second lateral walls of said superstructure, wherein at least one bulkhead is arranged on said deck, said bulkhead comprising at least a first wall extending from said second flank of said hull and being substantially coplanar with said first transverse wall of said tructure, n said first wall of said bulkhead has such a width along an axis perpendicular to said symmetry plane (L) that a distance (d) of the end of said first wall of said bulkhead adjacent to said first transverse wall from said symmetry plane (L) is equal to or smaller than a maximum distance (d’) of said second lateral wall of said superstructure from said symmetry plane (L), said transverse walls and said lateral walls of said superstructure all having the same height and the height of said first wall of said bulkhead being ntially the same as the height of said walls of said superstructure.

2. Pleasure craft according to claim 1, wherein said superstructure has a portion having a smaller width near said first erse wall.

3. Pleasure craft ing to claim 1, wherein said bulkhead further comprises a second wall which extends towards said stern in a direction substantially orthogonal to said first wall of said bulkhead and is substantially aligned with said second flank of said hull.

4. Pleasure craft according to claim 1, wherein a second bulkhead is r provided on said deck, which second bulkhead comprises at least a first wall extending from said second flank of said hull and being ntially coplanar with said second transverse wall of said superstructure, wherein said first wall of said second bulkhead has such a width along an axis perpendicular to said symmetry plane (L) that the distance (d) of the end of said first wall of said second bulkhead adjacent to said second transverse wall from said symmetry plane (L) is equal to or smaller than the maximum distance (d’) of said second lateral wall of said superstructure from said symmetry plane (L).

5. re craft according to claim 4, wherein said transverse walls and said lateral walls of said superstructure all have the same height and wherein the height of said first wall of said second bulkhead is substantially the same as the height of said walls of said superstructure.

6. Pleasure craft according to claim 4, wherein said superstructure has a second n having a r width near said second transverse wall.

7. Pleasure craft according to claim 4, wherein said second bulkhead further comprises a second wall which extends towards said bow in a direction substantially onal to said first wall of said bulkhead and is substantially aligned with said second flank of said hull.

8. Pleasure craft according to claim 3, wherein said bulkhead further comprises a third wall joining the free ends of said first and said second walls of said bulkhead.

9. re craft according to claim 7, wherein said second bulkhead r comprises a third wall joining the free ends of said first and said second walls of said bulkhead.

10. Pleasure craft according to any one of claims 1 to 9, wherein said bulkhead and, if provided, said second bulkhead is/are fixedly and ently mounted on said deck.

11. Pleasure craft according to any one of claims 1 to 9, wherein said bulkhead and, if provided, said second bulkhead is/are y and/or removably mounted on said deck.

12. Pleasure craft according to any one of the ing claims, wherein said pleasure craft comprises a flying bridge covering said superstructure and extending in a direction transverse to the symmetry plane (L) of said pleasure craft across the entire width of said deck and wherein said bulkhead and, if provided, said second bulkhead act(s) as a support for said flying bridge.