DE102004047867A1 - Sliding Cat - Google Patents

Abstract

Conventional catamarans tend due to the displacement principle of their hulls and the wandering upward with increasing wind sail pressure point at high speeds for diving the leeward fuselage tip. Thus, a conventional catamaran despite its speed due to its hull shape as well as the displacement hulls of other sailboats is limited in its maximum speed. The novel described in the claim catamaran, however, can pass through the flat bottom surface of its hulls at high speeds in a sliding phase and thereby achieve a significant increase in speed compared to the conventional catamaran. The resulting hard waves of the hulls are absorbed by shock absorbers under the trapezoidal beams, creating a smooth gliding ride is achieved. In addition, as the wind increases, or on ridden courses, the forward-wandering sail pressure point can be counteracted by aftward trimming of the variable mast so as to assist the gliding phase of the catamaran. DOLLAR A In order to achieve the earliest possible sliding phase, the hulls of the catamaran described in the claim are characterized by a flat lower surface. In addition, they are attached at an inwardly inclined angle of about 10 ° to the side trapezoidal beams, so that they dive with slow displacement drive with their narrow inner side into the water, while in much wind through the injury ...

Description

Catamarans make up the group with the highest speed potential among sailboats, because the quotient of sail area to water displacement is much larger than with conventional monohulls. In addition, the conventional Catamaran hull very narrow and therefore has slower and medium Speed hydrodynamic advantages over the broad conventional Hull of a sailboat.

at high speeds are based on the displacement principle narrow Catamaran hull, however, limits. So it raises faster Do not ride on the water surface and thus does not get into the for high speeds hydrodynamically favorable sliding phase such. B. the hulls surfboards or light sailing dinghies. On the contrary tend the hull tips of a conventional catamaran in a lot of wind and high speeds due to the displacement principle of the hulls as well through the bugward Shifting of the sail pressure point for diving, what as well as 'Cropping' the hulls referred to as.

The Problem we by the novel form described in claim Fixed catamaran hull.

The hulls ( 10 ) are characterized by a flat undersurface, so that they can cross into a sliding phase when driving fast. At the same time they are in an inwardly inclined angle of 10 degrees to the lateral Trapezholmen ( 14 ), so that the leeward hull in a lot of wind due to the occurring heeling of the catamaran then rests flat on the water ( 6 ), which provides the most boost for the transition into the hydrodynamically favorable sliding phase, while the windward hull (as in conventional catamarans) increasingly rises from the water. With little wind and slow displacement drive, however, both hulls dive obliquely with their inner side in the water ( 5 ) and thus form a hydrodynamically favorable, narrow profile for the displacement drive.

Description Subclaim 1:

In order to reduce the ripples occurring during fast sliding, which are larger than in a conventional catamaran, whose narrow hulls practically cut through the waves by their displacement principle, the trapezoidal spars in the novel catamaran are on shock absorbers (in the catamaran fuselage described in the claim greater) 16 ), so that waves of the hulls are cushioned, and thereby a smooth glide is achieved.

Description Subclaim 2:

There in a catamaran with a lot of wind or on rough courses of the Sail pressure point as described above migrates forward, will be among these Conditions increasingly burdened the bow of the catamaran, resulting in a Conventional catamarans to the above described descent the fuselage tips or in the novel under the claim mentioned catamaran to a late transition into the hydrodynamic favorable sliding phase to lead would.

This problem is with the per cable (rope A and B) movable mast in Unteranspr 2 solved. The mast ( 1 ) is on a movable mast track ( 13 ) and can be trimmed backwards in a lot of wind or on spaceship courses by cable (rope A) ( 3 ), whereby it locks automatically on the mast track in the desired position. On, on the wind 'courses or with little wind, the mast ( 1 ), however, after solution of the lock on the mast rail by opposite cable (rope B) moved forward and locked again, so that improved by the longer water contact surface of the hulls (lateral surface) the cross-characteristics, and the Luvgierigkeit the catamaran is reduced. The cable tension system is arranged so that with the displacement of the mast foot forwards or backwards at the same time the mast top and jib ( 7 ) moves forwards or backwards. This is done by flexible shrouds ( 2 ), each around a rear and front Wantenumlenkrolle ( 5 ) are guided, which are located on the underside of the side or front legs. The end of the shrouds are each attached to the mast base under the mast track. By retracting the mast ( 1 ), the shrouds ( 2 ), whereby the mast top also displaced to the rear. At the same time, the forestay ( 8th ), which also has a front ( 6 ) and back ( 4 ) Vorstagumlenkrolle is connected to the mast, relieved. The luff of the jib ( 22 ) in turn is on an additional wire rope ( 11 ), with the one end behind the front Vorstagumlenkrolle ( 6 ) with the forestay ( 8th ) and with the other end with the mast ( 1 ) connected is. The aft trimming of the mast on rope A ( 3 ) now also causes an aft movement of the wire rope ( 11 ), whereby the luff of the jib ( 22 ), with the wire rope ( 11 ), is also trimmed to the eighth.

When advancing the mast base ( 4 ) by pulling on rope B around the front middle Um steering roller is connected to the mast above the trapezoid, the forest day ( 8th ) via the rear pulley ( 4 ), while the shrouds ( 2 ) by the front Wantenumlenkrollen ( 5 ) be relieved. Thus, the mastop is shifted forward. Due to the shift of the forecastle to the rear, at the same time it moves with it behind the front forestay pulley ( 6 ) connected wire rope ( 11 ) and the jib luff attached thereto ( 22 ) and rolls on the front forestay pulley ( 6 ) on..

Overall, this allows the advancing and retreating of the entire mast ( 1 ) with jib ( 7 ) by two ropes (rope A and B) comfortably from the pusher on board.

Claims (1)

Multihull (catamaran), characterized in that the hulls each have a flat bottom surface, whereby they can lift at high speeds on the water surface and thus can go into a hydrodynamically favorable sliding phase. Additionally angled attachment of the hulls to the side trapezoidal spars in an inwardly inclined angle of 10 degrees, so that at slow speed (without damaging the catamaran) both hulls with their inside oblique dive into the water, while at fast sliding (with kratk of the catamaran) the leeward hull rests flat on the water surface, while the windward hull rises (as in conventional catamarans) increasingly out of the water. Unteranspruch 1: front and rear trapezoidal spar, which connect the hulls together, characterized in that the outer vertices of the trapezoidal spars are mounted on shock absorbers, so that when fast sliding waves ripples of the hulls are cushioned. Unteranspruch 2: sail mast, characterized in that it is movably mounted on a mast track with different detents, and thus can be trimmed by a cable to aft in wind or on rough courses, while he winds in low winds and on the wind courses by cable can be moved.