DE3404429A1 - Outrigger boat with inclined rig - Google Patents

Abstract

In outrigger boats with a hull of identical shape at the bow and stern, an outrigger on the lee side, and a rig inclined to windward, the mast foot of which is disposed on the outrigger end on the lee side, the heeling moment from wind forces is known to be partly or completely neutralized. In addition, a vertical sail force component results which reduces the submerged volume of the boat. The construction and handling of the boat are simplified and improved by a rig which can be displaced parallel to the longitudinal axis of the hull at the level of the mast foot, has no stays, can be rotated and tilted at the foot point and is guided by the yachtsman using a steering device, preferably a steering frame, from a platform located on the hull. Centreboards and rudders are thereby completely dispensed with, the reefing of the sail is largely avoided by inclining the rig, and in an emergency a horizontal position of the rig is possible. The platform projecting to windward serves the yachtsman as a base and provides favourable weight distribution.

Description

Boom boat with inclined rig

Description The invention relates to an outrigger boat according to the preamble of claim 1.

Outrigger boats have been known in the area for centuries of the Pacific island world. The main features of these sailing craft, known as P r o a are windward outriggers and stowed rigs standing on the hull (see Mc Mullen, Multihull Boats, Delius Klasing und Co., Bielefeld 1977, p. 15 ff.) Modern constructions of the same or similar type are only available in individual cases today to find. The boom is preferably arranged on the leeward side of the fuselage, as described in Marchaj, Aerodynamics and Hydrodynamics of Sailing, Verlag Delius Klasing, Bielefeld 1982, pp. 91-93.

The advantages of an inclined rig are also known, for example the is used in sailboards according to DE 1914 6c4. A slope to windward this one Rigs that can be rotated and tilted at the base generate vertical sail force components that Reduce the submerged volume of the sailboard and d-aby its sailing characteristics to enhance.

A reduction in the heeling moment acting on the sail board from wind forces is not possible with this arrangement, since a horizontal one Moving the mast foot across the trunk, which is necessary to achieve this effect would not be provided. Wenl also use the crooked large trees as handles for Serving the sailor, the "ií! g" can only be done close to the body, but not from a greater distance be guided.

The same applies to the arrangement of a rotatable and tiltable rig on the body of a Proa according to DE 26 45591.

A Ri.r3g for a sail board with a transversely movable mast base is given in DE 30 17 232. The displacement of the mast foot across the trunk is, however for structural reasons so small that a substantial reduction in the heeling moment does not occur.

The more extensive suggestion, the favorable hull properties of a Consistently combining Proa with the advantages of an inclined rig is found at Sass, catamarans and other multihulls, Verlag Klasing und Co. GmbH., Bielefeld 1977, pp. 141 - 142. The draft principle presented here shows a Proa-mit leeward boom, the inclined, fixed-stay rigging with the mast foot to the side supported by the hull on the leeward end of the jib.

Serious disadvantages also arise with this solution.

Since the sail is swiveled around 1800 when it ends, it also shifts the pressure point on the sail is considerable. For trimming the hull, therefore, at least two swords necessary, which leads to greater frictional losses, but also too cumbersome Handling leads.

It is practically impossible to reef the sail in the sail position. A reefing would only be possible with a turn of the sail through the wind up over the boom conceivable. However, this maneuver is hardly feasible in stronger winds.

In light weather the sail falls under its weight when it is inclined Mast axis in the direction of the hull. The swiveling of the sail when turning is also possible difficult0 The finding is based on the task, the construction and to improve the handling of the outrigger boat defined in the generic term and to simplify that the disadvantages described above are eliminated.

The task is defined by the characterizing features of the claim 1 solved.

Further expedient refinements of the invention emerge from the subclaims.

The advantages achieved with the invention are in particular the following: 1. By moving the mast foot parallel to the longitudinal axis of the fuselage, the rig moved to an appropriate position in relation to the fuselage for each sail position will; Swords on the fuselage are completely eliminated.

2. The sailor guides the rotatable and tiltable rig, which is approx. 2 - 3 m away from him, with the help of the steering frame also at a distance purposefully in an expedient manner. A rudder is therefore not necessary, 3. Depending on the wind strength the rig is tilted more or less to windward. The sail can be reefed thereby largely avoid.

4. In light winds, the rig is over the Steering frame held in a convenient position. The sailor pulls for the turn the mast close to the body and can then swivel the rig in a targeted manner.

5. If the gust is too strong or in an emergency, the sailor leaves the rig fall on one side or the other of the boom on the water or hull, which takes the wind pressure out of the sail. The rig can then be easily removed straighten up when the sailor is standing on the hull the mast with the tether in a position roughly parallel to the fuselage, the mast to two fifths of its Length and then raise the rig.

6. The platform, which is arranged eccentrically to the hull, gives the sailor the necessary floor space, as the narrow boat deck alone provides a firm hold not enough.

The sailor also educates by positioning his feet accordingly a Counterweight to the boom and rig on the other side of the hull, so that the swimmer hardly touches the water or not at all, which improves the driving characteristics.

The invention is illustrated below with reference to the drawings Embodiments explained in more detail.

FIG. 1 shows a: front view of the outrigger boat FIG. 2 the associated side view seen from the leeward side, FIG. 3 shows a plan view the boom boot Figure 4 is a plan view of the version with a rotatable boom according to sub-claim 2 Figure 5 is a plan view for execution with on the float Slidable mast base according to dependent claim 3 Figure 6 the steering frame according to dependent claim 4 shows the steering frame as a plan view when using a curved sail spar according to dependent claim 4 as a plan view when using two curved spars.

The embodiment shown in Figures 1, 2 and 3 shows the fuselage (1) with the platform (2) attached to it. The boom (3) connects the fuselage (1) with the leeward swimming pool.

mer (4) and the rig, which consists of the mast (6), the sailing spar (7) and a sail, not shown here.

The rig stands above the mast base (5) and rotates. tiltable on the boom (3). The sailor guides the rig on the steering frame (8).

The tether (22) prevents the mast (6) from tilting. about the Perpendicular out to lee.

The rotatable boom in Figure 4 consists of the spar (3) with the vertical axis of rotation (9) in the middle of the platform (2). The counter bracket (lo) the spar (3) engages around the here circular edge of the platform (2). At the outer end of the spar (3) is the mast base (5) at the top and the vertical axis of rotation at the bottom (11) of the freely rotatable float arranged. The shape of the float (4) and the Location. the axis of rotation (11) on the float (4) are chosen so that it is at Touching the water surface by itself in the correct position in relation to the passing Water turns the location of the The spar (3) changes when you turn the Outrigger boat into position (3 ') by rotating around axis (9). Change accordingly Float (4 ') and mast base (5') their position.

Figure 5 shows a further embodiment for moving the mast foot (5). The platform (12) lying outside the fuselage (1) has one or two Spars (13) firmly with. the hull (1) and the long float (14) connected. the The mast foot (5) is shifted into the counter-position (5 ') via a slide rail (15) that are on the float. (14) superimposed.

Figure 6 explains the function of the steering frame (8). The preferably curved spars (7) which together with the mast (6) form the rig, is at the rear end via the joints (16) and (17) to the rear corner of the pentagonal Steering frame (8) connected. The joints (16) and (17) opposite The guide rod (21) is attached to the spar (7) in a longitudinally movable manner through the sleeve (20). The sailor grasps the steering frame on the handle bar (18), whereby the wind force that Rig with the sleeve (29) along the guide rod (21) up to the handle bar (19) presses.

When turning, the sailor grips the handle bar (19).

The wind force swings the rig, which is guided through the sleeve (2oY) lengthways the guide rod (21) back to the handle bar (18), so that the steering frame assumes the position shown in dashed lines with the grip strips (18 ') and (19').

In both positions, the glider uses almost the full width of the steering frame between the handle strips (18) and (19) to get the rig from the greatest possible distance respectively.

When pivoting, slight deformations occur in the steering frame mainly taken up by the elastically deformable grip strips (18) and (19) while all other parts of the steering frame are made of high-strength material.

In Figure 7, a further embodiment of the steering frame is shown. The rig, which consists of the mast (6), a sail, not shown here, and two curved ones Spars (7) exists, is guided as in Figure 6 with the steering frame.

The rear Celenkpunkte tal6) and (17) are at the ones facing them Spars (7) attached. Otherwise, the mode of operation of the Celenkrahmens remains same as described in FIG.

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Claims (5)

Outrigger boat with inclined rig Patent claims 1. Outrigger boat with a hull shaped identically at the bow and stern, a leeward arm and one inclined to windward, with the mast foot on the leeward boom standing rig characterized in that an unstayed, rotating in the base and tiltable rig in Hel. of the mast foot (5) parallel or approximately parallel to the longitudinal axis of the hull (1) is shifted depending on the sail position, the sailor the rig with the help of a control device, preferably a steering frame (8) and in a position favorable to the wind. 2. Boom boat according to claim 1, characterized in that for Moving the mast foot (5) a rotatably mounted in the middle of the fuselage, from a spar (3) Existing boom is used, which is at the leeward end on the top of the mast base (5) and on the underside by a horizontally freely rotatable float (4) is supported. 3. Outrigger boat according to claim 1, characterized in that the mast base (5) is moved lengthways in a rail (15) on the float (14) and one or two spars (13) rigidly connect the hull (1) to the float (14). 4. Outrigger boat according to claim 1, 2 or 3, characterized in that that a pentagonal, elastically deformable steering frame (8) to guide the rig serves on one or more preferably curved sail spars (7) of the rig is fastened in zueckweise manner and by pivoting about the joints (16) and (17) is rotated depending on the wind direction so that it is located on the platform (2) Allows sailors to guide the rig, which is vertical or inclined at the end of the boom. 5. boom boat according to claim 1 to 4, characterized in that a platform (2) cantilevering on the windward side of the hull (1) for the sailor advantageous weight distribution counteracting the heel from the sail force enabled.