EP2250074A2 - Profile sail boom for sail boats - Google Patents
Profile sail boom for sail boatsInfo
- Publication number
- EP2250074A2 EP2250074A2 EP09709272A EP09709272A EP2250074A2 EP 2250074 A2 EP2250074 A2 EP 2250074A2 EP 09709272 A EP09709272 A EP 09709272A EP 09709272 A EP09709272 A EP 09709272A EP 2250074 A2 EP2250074 A2 EP 2250074A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sail
- tree
- profile
- profile sail
- tensile
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H9/00—Marine propulsion provided directly by wind power
- B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
- B63H9/08—Connections of sails to masts, spars, or the like
- B63H9/10—Running rigging, e.g. reefing equipment
Definitions
- the invention relates to a horizontally flexible profile sail boom for a ship for the aerodynamic trim of a batten mainsail, which consists in cross section of a centrally edgewise shaped vertical support beam from the lowest point on both sides about 90 ° angle crossbars depart as baffles, according to the Preamble of claim 1.
- the standard sails of a standard sailing yacht usually consists of two sails struck on a standing about midships mast.
- the triangular foresail in front of the mast is raised or preheated along a forestay, which is stretched from the boat tip to the top of the mast.
- the clew as a free end of the figure-eight and underbelly is brought close by means of a Vorsegelschot, so that the sail to the incoming wind can take a favorable aerodynamic profiled shape that generates as large a drive component in the direction of travel by large-volume wind deflection.
- the mainsail is behind the mast by means of a standard mast guideway connected vorli impartt with his luff, whereas the underbelly is supported on the boom, which can be mounted on both sides of the mast horizontally pivotable on the mast and can be hauled close to the mainsail with a mainsheet.
- the mainsail is usually provided for better standing and efficiency because of several flexible and prestressed battens, which allow the formation of an aerodynamically favorable sail profile with sufficient stability along with the usual leech exhibition, which provides a desired increase in the sail area at the same mast length.
- the characteristic design of the sail profile and its angle of attack is decisive for the specific propulsion power per m 2 sail area.
- the respective tread depth and their control at all heights up the sail is devoted much technical effort, such as sewn sail profiles, 3D laminates as sails and facilities for controlled bending of the mast in the direction of travel. This is usually done in the upper part of the sail extremely accurate, but in the vicinity of the straight tree, the propulsion flow pattern is increasingly distracting derived and last interrupted by the sail tree, which is the flow direction strong in the way vortex forming.
- the sail area provides reduced propulsive power and deflected by their obliquely upward gradient the air flow upwards accordingly, which in addition leads to an increased sail pressure point and more heeling with power loss.
- the profile sail tree consists of a suitable number, e.g. six to eight or more pieces horizontally hinged sections, which are arranged vertically biege ⁇ teif.
- the upright carrying central spar in a narrow, smooth design takes over the vertical bending stiffness of the tree and represents an additional effective sail area, while the lower crossbar on the one hand limits the horizontal Verknickung the sections to each other or controls, on the other hand he forms with its two-sided vanes those fluidic resistance to To prevent the unwanted pressure equalization from the windward to the opposite leeward side of the sail underbelant largely, which advantageously reduces the force-inducing induced drag vortex.
- the required sail profile of the sail is brought down to the very bottom of the trimmable tree by its deflection shaping, which is generated automatically by the wind pressure.
- the best possible tread depth is manually adjusted and can be brought together with the downdraft of the head sail in cooperation to maximum possible overall efficiency.
- the mechanically necessary stiffness in the vertical plane of the sail tree according to the invention can be done by suitable vertically arranged bearing pairs between the individual sections, which allow a two-sided horizontal buckling to each other.
- the bearing structure is proposed from several lamellar bearing eyes, which are alternately fixed in the opposing section of the profile sail tree force distributing in the support structure.
- the vertically rigid cohesion of a possible embodiment is carried out by high-strength flexible tension cords, which pass through at the top and bottom along the edgewise central spar of the parts connecting them and are fixed to the end pieces under bias.
- the vertical tilt axes lie in the median plane of the sail tree between the upper and lower Switzerlandstrang, with maximum possible distance height to each other, as permitted by the construction height of the profile sail tree ,
- a further preferred embodiment of a profile sail tree consists entirely of fiber plastic, which can be advantageously manufactured in a laminated piece and includes all the properties for obtaining the functions of the invention in the formed laminate structure and the special shape of the support body.
- the narrow upright center spar is made in one piece and has laminated in the top and bottom of a respective running in the longitudinal direction of high-tensile flexible tensile strand.
- the height-flattened plait-like tension cords have upwards or downwards a cross-sectional mass in order to obtain high flexural rigidity in this vertical plane.
- in the horizontal plane of the central spar according to the invention is narrow in construction and in the choice of material bendable.
- laminated transverse beams must not significantly affect this flexibility and are therefore separated at short intervals by wedge-shaped slots in sections that allow the necessary deflection to each other, but ultimately end by stop the permissible horizontal deflection limit.
- the wedge-shaped slots open and close at each turn and must therefore be equipped with a contact protection to avoid injury. This can be done with tab-like covers extending over the slot, or with hand-repellent overlaps recessed in the laminate wall.
- the control over the curve of the mutually horizontally tilted sections is advantageously carried out over the lowest point on both sides cantilevered crosspiece, which has by the tilting on the outside of the curve enlarged distances from the tilting edge and reduced on the inside by the same amount.
- the control of these distances to each other on both sides allows the setting of a specific curve, which is changed by the ship's crew as needed.
- the mainsail like all other sails, passes over from one side of the ship to the other, where it is re-turned to wind at the other bow.
- the profile sail tree is taken along relatively powerless in this way and is on new bug, when the sail pressure rises and the mainsheet comes to train, pulled in his preset profile.
- the setting of the desired profiling of the sail tree is made by tensile strands of preferably sheathed fiber plastic sufficient strength and flexibility, which extend at the outer ends of the cantilevered transverse webs passing through this in sliding bearings longitudinally displaceable.
- Each pullstring has preferably on the mast side end of a fixedly connected to the cross bar threaded spindle, which is mounted for example by means of a rotatable on both sides starting nut non-positively longitudinally.
- On the other end of the pull string an end terminal is fixedly mounted, which finds an end stop on the cam-side portion in a guide eye in the pulling direction.
- both tension cords have been screwed, for example, to their short length, the fixed at the outer ends tree is mediated and straight pulled. If both nuts are opened and the tension cords are extended to the same extent, the tree can be deflected in both horizontal directions by wind pressure until one of the cords comes into tension and limits the bending volume. The other strand, however, pushes its excess length through the guide eyelet and distances the end terminal of the strand accordingly from the end stop of the crosspiece.
- the manually set lots of the control strands limits the respective preset deflection volume of the tree, but not the curve to be transferred to the sail and the possible position of the maximum deflection. This is determined by the prevailing sail pressure of the adjacent air flow accordingly automatically in connection with the direction and strength of the Schotzuges on Baumnock. It thus turns out similar to a headsail a fluidically balanced deflection curve, which can be trimmed to a performance optimum by direction and Schotzugharide.
- Fig. 1 shows a sail tree according to the invention (1) in side view
- FIG. 2 is the plan view of FIG. 1.
- Fig. 3 is a central section through the sail tree (1) with attached sail area
- Fig. 4 is a central section through a conventional sail tree for explanation
- Fig. 6 is the partially sectioned side view of the adapter connection
- FIG. 7 shows in plan view a deflection curve controlled by tension cords (27).
- Fig. 8 shows a possible embodiment of a vertical tilting bearing.
- Fig. 9 shows a Querterrorismsauf construction of a preferred profile sail tree (1).
- Fig. 10 is a plan view of a portion of the profile sail tree (1 It. Fig. 9).
- Fig. 1 shows a profile sail tree (1) in side view according to the invention with a battened over batten main sail (2) on a shortened drawn mast (3) in a known manner by Mastlaufmégen (4) on the luff (4a) z. B. in each case before sailing battens (5) is posted.
- the mast (3) stands on a ship (6), which has set a standard foresail (7), which is posted on a forestay (8).
- the profile sail tree (1) is usually mounted on the mast side with a generally movable Lümmelbeschlag (9) and with a suitable tree support (10 - dash-dotted lines) held approximately horizontally.
- the Segelzug takes over a usual groomed mainsheet (11).
- a second mainsheet (12) with aft hole point (12a) can advantageously be struck.
- the tree consists of a mast-side section (13), a cam-side section (14) and in between a plurality of similar intermediate pieces (15).
- FIG. 2 is the simplified plan view of the sail arrangement shown in Fig. 1. It shows the center line (16 - dash-dotted lines) of the ship (6 in Fig. 1) with its direction of travel (17), a prevailing wind direction in the direction of arrow (18) , the profile sail tree (1) according to the invention in a possible deflection form behind a cross-sectional shape of a mast (3) and the shape of a conventional foresail (J) which is struck deflected on the forestay (8) on the center line (16).
- the incoming wind direction (18) flow line (19) of the prevailing windward air movement is passed from the profiled foresail (7) on the leeward side of the aerodynamically shaped profile sail tree (1) and there amplifies the flow energy of the adjacent Leeströmung without possible demolition to larger deflection volume and propulsive power, whereby even the sail tree (1) connected to the top according to the invention mitprofiled sail area can now perform full performance.
- the maximum possible propulsion power is therefore also on the windward side of the mainsail (2 in Fig. 1) by the correct diversion of the windward flow (19 a) reach.
- the not-shown leeward air flow of Vorsegels (7) also applies to ordered flow conditions of the mainsail (2 in Fig. 1) and can therefore redirect them without vortex further large volume.
- Fig. 3 is the section in approximately half the length by the profile sail tree according to the invention (1) in the direction of the luff (4a) of the sail (2), the luff (4a) in the middle at the trailing edge (not shown) of the mast (3 - Fig. 1) at a suitable distance from this runs.
- the sail (2) from the edgewise spar (21) of the Profilsegelbaume ⁇ (1) continues in the same line upwards, so that via the luff (4a) incoming luv- and leeward horizontal flow lines (23) impinge as directly as possible and As far as possible, they should not be deflected upwards in their propulsion bringe ⁇ den horizontal deflection, which would unintentionally increase the sail pressure point and would lead to more heeling.
- the not insignificantly large side surface of the edgewise spar (21) generates in its profile in the flow direction similar propulsive power as the subsequent sailing area and improved to this extent also the sailing performance.
- Fig. 4 is also a similar section through a, but straight, sail of conventional design, also in its about half the length, and the same direction of view for explanation. Illustrated by way of example is a conventional in a curve obliquely upward sail transition (24) in the middle of a sail from a straight sail tree to the necessary for the drive tread depth of anschiebenden sail profile higher above, as he may also occur in the reefed state of the sail.
- the incoming horizontal flow lines (23) are thereby deflected obliquely upward, which leads to the undesirable increase of the sail pressure point with more heeling and corresponding loss of power.
- the side surface of the straight sail tree is flowed obliquely in full length by the wind and causes corresponding wind resistance, which slow down at Amwindadosen.
- Fig. 5 shows a possible cross section of a profile sail tree (1) according to the invention in one embodiment of welded aluminum support structure parts (25) and an aerodynamic smooth outer cladding made of fiber plastic (26), which also serves as contact protection by overlaps of the moving parting lines (41 in FIG 7) is used (drawn in dotted lines).
- Fig. 6 is a partially sectioned side view of two adjacent aluminum structural members (25) of the central intermediate sections (15) of the profile sail tree (1) according to one embodiment of the invention.
- Each pressure distribution piece (33) has an outwardly directed open recess (35) in which the prestressed tension cords (27) are centered in the top and bottom positions on the center of the profile sail tree (1) during final assembly and deployment.
- FIG. 7 shows in plan view a profile sail tree (1) behind a mast (3) in a possible deflection curve according to the invention, the lower luff of the subsequent upwardly extending batten mainsail (2) being guided in a suitable connection over this dot-dashed center line and the tension cords (27 ).
- the maximum Auslenkungkkurve the Ausle ⁇ kungsbegrenzung (32 in Fig. 5) is limited by the respective outer tensile strand (31), for example, sheathed Faserplast when the fixedly connected to him threaded spindle (36) by means of their on both sides of the housing (39 a) of the section ( 13) oncoming rotatable adjusting nut (39) is completely worn out and the end terminal (37) at the other end of within the profile sail boom (1) longitudinally displaceable Werstrange ⁇ (31) the guide eye (38) of ⁇ ock stoolen section (14) has reached as an end stop and the tensile strand (31) goes for tension.
- Fig. 8 shows a possible embodiment of a vertically rigid tilting bearing between two adjacent intermediate pieces (15) of a welded aluminum support structure of a profile sail tree (1).
- the respective associated on the same tilt axis (29) located in the lower chord support (not shown) has analog structure.
- the bearing pin (44) is repeatedly subjected to shearing and can therefore be designed to be advantageously thinner, wherein the of Multiple storage transferable large forces distributed and a large area in the supporting straps (42) can be initiated, which causes weight savings.
- Fig. 9 shows a cross-sectional structure of a preferred construction of a profile sail tree (1) according to the invention, which is made in the main structure of fiber plastic.
- the batten main sail (2 - shown in phantom) Following about the Hochkantholm (21) approximately in the extension of the center line (45) is the batten main sail (2 - shown in phantom), e.g. Tied by a bunch of tape through several suitable openings (46). These openings (46) are also used to attach the Reffbä ⁇ dsel the usual Bindereffs the batten mainsail (2).
- the necessary cohesion of the profile sail tree (1) is ensured by the upper tension cord (47) or the lower tension cord (48) of a longitudinal high-strength fiber strand, which is connected by the Wandungslaminat Hochkantholmes (21) with sufficient strength and flexibility thrust.
- transverse webs (22) laminated to both sides each have at their outer ends a laminated guide tube (49) which is penetrated by a longitudinally displaceable tensile strand (50) of likewise flexible fibrous plastic stretched along the profile sail tree (1).
- Fig. 10 is a plan view of a portion of the profile sail tree (1) with the symmetrical cross-sectional shape (20 It. Fig. 9) in one of the sail (2) inventive profiling curvature.
- the molded lateral transverse webs (22) with their guide tubes (49) at correspondingly short intervals by correspondingly wide continuous spacer joints (52) separated from each other to the freedom of movement for the necessary horizontal To allow deflection on both sides of the continuous upright spar (21) with the least resistance, but provide the rigidity against rotation of the profile sail tree (1).
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Wind Motors (AREA)
- Jib Cranes (AREA)
- Tents Or Canopies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0018508A AT506349B1 (en) | 2008-02-06 | 2008-02-06 | PROFILE ANGEL TREE FOR SAILING SHIPS |
PCT/AT2009/000041 WO2009097638A2 (en) | 2008-02-06 | 2009-02-03 | Profile sail boom for sail boats |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2250074A2 true EP2250074A2 (en) | 2010-11-17 |
EP2250074B1 EP2250074B1 (en) | 2012-04-25 |
Family
ID=40785307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09709272A Active EP2250074B1 (en) | 2008-02-06 | 2009-02-03 | Profile sail boom for sail boats |
Country Status (6)
Country | Link |
---|---|
US (1) | US8516972B2 (en) |
EP (1) | EP2250074B1 (en) |
AT (2) | AT506349B1 (en) |
AU (1) | AU2009212087A1 (en) |
NZ (1) | NZ587800A (en) |
WO (1) | WO2009097638A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SI23427A (en) | 2010-07-26 | 2012-01-31 | Primum D.O.O. | Sail systems with protuberant profile and reduced induced resistance |
EP2873606B1 (en) * | 2013-11-19 | 2017-03-01 | Konstantinos Vlahodimos | Flexible boom and its sail system-FBSS |
US9185991B2 (en) * | 2013-12-30 | 2015-11-17 | Axess Direct, Inc. | Uni-directional rigidifier and method |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US879986A (en) * | 1906-07-02 | 1908-02-25 | Percy Tatchell | Sail-boom. |
US3310017A (en) | 1964-11-30 | 1967-03-21 | Dow Chemical Co | Aerodynamic sail, boom and jaw for boats |
FR2472508A1 (en) * | 1979-12-28 | 1981-07-03 | Boisson Ernest | Boom with variable profile to alter sail curvature - has support beams travelling along boom under action of screw threaded rod |
FR2557064A1 (en) * | 1983-12-21 | 1985-06-28 | Boisson Ernest | Boom with variable profile |
US4733624A (en) * | 1984-03-20 | 1988-03-29 | Worldly Innovations, Inc. | Flexible wing rib sail |
US4649848A (en) * | 1984-03-20 | 1987-03-17 | Belvedere Mark S | Flexible wing rib sail |
US4686921A (en) * | 1984-03-28 | 1987-08-18 | Gaastra Sails International Limited | Flex wing apparatus |
SU1512858A1 (en) * | 1987-06-26 | 1989-10-07 | Предприятие П/Я В-2877 | Sail boom |
US5065685A (en) * | 1990-07-02 | 1991-11-19 | Stevenson William H Iv | Marine sail with batten attachment assembly |
US5640919A (en) * | 1994-03-25 | 1997-06-24 | Rondal B.V. | Boom-structure |
US5406902A (en) * | 1994-05-24 | 1995-04-18 | Heinsohn; Gerd | Method and apparatus for optimum sail shaping |
AT504907B1 (en) * | 2007-07-10 | 2008-09-15 | Waldhauser Kurt | ROLL REFILL FOR SAILING SHIPS |
-
2008
- 2008-02-06 AT AT0018508A patent/AT506349B1/en not_active IP Right Cessation
-
2009
- 2009-02-03 NZ NZ587800A patent/NZ587800A/en not_active IP Right Cessation
- 2009-02-03 WO PCT/AT2009/000041 patent/WO2009097638A2/en active Application Filing
- 2009-02-03 AT AT09709272T patent/ATE555004T1/en active
- 2009-02-03 US US13/256,408 patent/US8516972B2/en not_active Expired - Fee Related
- 2009-02-03 EP EP09709272A patent/EP2250074B1/en active Active
- 2009-02-03 AU AU2009212087A patent/AU2009212087A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2009097638A3 * |
Also Published As
Publication number | Publication date |
---|---|
NZ587800A (en) | 2013-04-26 |
US20120111254A1 (en) | 2012-05-10 |
WO2009097638A3 (en) | 2010-07-08 |
AT506349A1 (en) | 2009-08-15 |
ATE555004T1 (en) | 2012-05-15 |
US8516972B2 (en) | 2013-08-27 |
WO2009097638A2 (en) | 2009-08-13 |
AU2009212087A1 (en) | 2009-08-13 |
EP2250074B1 (en) | 2012-04-25 |
AT506349B1 (en) | 2009-11-15 |
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