Tunnel Rigging
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(19) & (11) EP 2 284 075 A1 (12) EUROPEAN PATENT APPLICATION published in accordance with Art. 153(4) EPC (43) Date of publication: (51) Int Cl.: 16.02.2011 Bulletin 2011/07 B63H 9/10 (2006.01) B63B 15/00 (2006.01) (21) Application number: 09742175.4 (86) International application number: PCT/ES2009/000231 (22) Date of filing: 30.04.2009 (87) International publication number: WO 2009/135969 (12.11.2009 Gazette 2009/46) (84) Designated Contracting States: (71) Applicant: Inversail, S.A. AT BE BG CH CY CZ DE DK EE ES FI FR GB GR 28023 Aravaca (ES) HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR (72) Inventor: FERNANDEZ PUENTES, Gonzalo Designated Extension States: E-28023 Madrid (ES) AL BA RS (30) Priority: 05.05.2008 ES 200801271 (54) TUNNEL RIGGING (57) Said inventions represent an improvement in the backstay and forestay to be capable of download self-supporting rotary rigging and, more specifically, the movement. There is a base crosstree, likewise securely type thereof that has a circular platform adjacent to the connected to the platform, perpendicular to the stays, deck of the vessel, which makes it possible to control the and to the ends thereof are fastened the shrouds, ena- rotation of the rigging and to install rotary stays and bling the latter to work at a suitable angle. In addition, shrouds, which assists in stabilizing the rigging. The in- there is a tunnel, in principle across the lower part of the venting is characterized by the existence of a small mast, which allows passage from one side of the rigging common boom securely joined to the base platform and to the other. to which are fastened the backstay and forestay, all the aforesaid making the rigging very secure and enabling EP 2 284 075 A1 Printed by Jouve, 75001 PARIS (FR) 1 EP 2 284 075 A1 2 Description main sail area. [0007] This solution would allow us to solve the struc- BACKGROUND OF THE INVENTION tural fragility of the hinged connection of the previous patent but, would not allow us to variate the distance to [0001] This invention aims to be another improvement 5 the deck and the inclination of the mainsail foot. In order in the field of "Self-Supported Rotating Rigs", calling by to solve this problem, we propose to add a mainsail boom this name those sailing rigs in which the mainsail boom (7), connected to the common boom in the area of the extends in front of the mast, bending a self- tacking jib to mast and in its posterior part (21). Actually what we have this common boom (5), rotating the whole set of: mast is a short common boom to which a mainsail boom is (1), boom and sails simultaneously around a sensibly 10 connected. The mainsail is bent to this mainsail’s boom, vertical axis, and being the whole rig supported by a ro- and the said movements allow us to increase or reduce tating rig connection (6) to the boat’s hull without having the mainsail vertical tension, and indirectly, the tensions to use shrouds or stays (Figure 1). of the jib’s luff through the top of the mast (Figure 6). [0002] Among others, this type of rigs has been already [0008] There is also a jib’s boom (8), with a similar used in 1975 by K.R. May under the name of Boomsprit 15 function to the mainsail’s boom with special accent on a and later by Carbospars Ltd under the name Aero-Rig. possible telescopic sliding, in order to permit the use of [0003] In 1999 we, Inversail, S.A., presented a new jibs with shorter o longer luff.(Figure 6) rig, much improved according to us, under the name of [0009] Another point that we want to improve is the Spindle-Rig, claiming the corresponding patent: "Im- rotating shrouds connection to the base platform. In our provements to rotary gear for sailing boats" (WO20 previous patent (Figure 4), the rotating shrouds were di- 0104000).(Figures 2, 3 and 4). Characteristics of this rig rectly connected to the base platform (2), this made them were: A platform (2) at the base of the rig, next to the work very badly because their inclination was too great ship’s deck, which allowed the rig’s rotation control, and and because their connection to the platform was not rotating shrouds (15) which from the said platform per- locally reinforced. In order to solve this, and to avoid at mitted the stabilization of the mast. Another important 25 the same time having an excessively wide platform, with feature of this rig was the use of two wishbone-type all the implied drawbacks, we now propose (Figure 7) a booms (16), one for the mainsails (3) and another one base crosstree (10), solidly connected to the platform. for the jib (4), being these booms hinged connected (28) This base crosstree curves upwards at its ends up to the to a first crosstree (12) placed above people’s heads, height of the life lines, or even more, so as not to damage whichpermitted the independent up and down movement 30 the crews shins. At the ends of this crosstree the rotating of the mainsail boom, and also that the sails could come shrouds are connected (15). It should be as wide as pos- down even to deck level, thus lowering the centre of effort sible as long as people can walk between this crosstree and making the sails more accessible. and the stanchions (for example if the beam of the boat [0004] Nevertheless, when we started the develop- at the base area is 4 metres wide, the first crosstree could ment and building of this rig we realized that the wishbone 35 be up to 3 metres long) (Figure 7). booms and their hinged connection to the first crosstree [0010] There are also two transversal reinforcements was not a good solution because the enormous horizon- (11), that go from each end of the base crosstree to the tal rotating torques created by the wind in both booms mast, their job is to absorb the great heeling torques cre- had to be absorbed through this delicate connection. Also ated by the wind on the sails. access to the said booms was rather difficult when reefing 40 [0011] We have got now what we could call a Cross and especially in emergency situations. Rig. (Figure 8). [0012] As the sails are so near to the deck, not only on DESCRPTION OF THE INVENTION this rig but also on the previous one, we are forced to go behind the mainsail or in front of the jib to be able to go [0005] In order to avoid these problems, we now pro- 45 from one side to the other of the rig. Moreover, unless pose the replacement of the two wishbone booms by a we lift or shorten in excess at its forward end the jib’s single common boom (5) monolithic and directly connect- boom,when the rig has rotated 90° it becomes impossible ed to the base platform. This boom increases its distance to go to the bow, unless we crawl.(Figure 6). to the deck as it goes away from the mast (Figure 5). [0013] Because of this, it seems necessary to have in [0006] The common boom should be wide in order to 50 the proximities of the mast a path allowing a person to be capable of absorbing the great horizontal torques cre- go from one side to the other of the rig without having to ated by the sails and in order to allow them to reach the go all the way round or having to crawl. Actually this not deck. There are as well longitudinal reinforcements (9) only permits working near the mast but also serves as a between said boom and mast for the absorption of the refuge where to shelter from the rotation of the rig. vertical tension created by the sails. These reinforce- 55 [0014] Apparently the easiest solution (Figure 8) would ments are laterally separated in order to allow for the be to have this path between the mast (1) and the jib’s sails to come down even to platform level, and there are clew (20). Nevertheless, it would only be possible to cross four reinforcements, two for the jib area and two for the with the jib well open, being also necessary for the jib’s 2 3 EP 2 284 075 A1 4 sheet traveller (18) to be at level with the platform (2) and placing the platform (2) on top of a raised rigid structure, for it to be wide enough to allow people to go though. All or by increasing upwards the thickness of the said plat- this, together with the need of having the jib’s boom (8) form. connected to the platform (2), makes this solution too [0021] The rotating control of the platform could be complicated. 5 placed below decks. This would protect the gear from [0015] Thus it seems to be much better to separate the weather. the mainsail luff (19) from the mast (1) leaving a path [0022] A common boom at the top of the mast would between them in the proximities of the deck. Now the jib permit increasing the sailing area where the wind is (4) only needs to open to save the width of the mast. stronger. It would permit a jib wider at the top, even a (Figure 9).