EP1274621B1 - Water vehicle - Google Patents

Abstract

The invention relates to a water vehicle with static and dynamic buoyancy, which has excellent maneuverability at high speeds. Said water vehicle has a hull which is essentially ellipsoidal in shape as seen in a radial section through the central point of the longitudinal axis, which is essentially ellipsoidal along the longitudinal axis as seen in an axial section and which is also essentially ellipsoidal as seen from above.

Description

The present invention relates to a watercraft static and dynamic buoyancy, which is high Exhibits agility at high speed with a Hull, with at least one keel and with at least one Drive.

Watercraft have the depending on their purpose different hull shapes. Fast, small ships, especially motor boats as well Defense ships, primarily as Multiple screwdrivers built, as with a two or four screwdriver arrangement the tendency of the propellers to cavitate reduced and a hydrodynamic irregularity of the Drive should be avoided. With two screwdrivers remains operational readiness also in the event of a failure Drive system largely preserved, with the addition Two-screw drive better maneuverability allows.

However, the multi-screw drive is in the last 20 Years almost completely abandoned because of that Screwdrivers both save in the area of Manufacturing costs as well as savings in the area of The focus was on fuel costs. Besides, they are Control properties of powered Watercraft at slow speeds much better than in the case of vessels with two drives, if these are equipped with a center rudder.

To ensure the greatest possible maneuverability with large Achieving speed has already been a myriad of fuselage shapes, trying to To improve flow properties. So describes the DE C 36 39 175 a hull for small vehicles and high speeds, with the hull below the Floating water line from one to almost the entire Vessel-shaped bead-shaped displacer exists, which is slim in the bow, then after in the back even over about two thirds of the length of the ship thickens, then towards a large one Center propeller tapered again and followed above a ship shape with a V-shaped frame character shoots in the back of the tunnel passes over, which covers the bead body and the propeller, so that there is a strongly concave above the bead trough-shaped form.

This is due to a reduction in trunk resistance the shift of the center of displacement backwards, d. H. by creating small entry angles in the bow achieved, as well as an abolition of resistance for the Storage of the side propeller shafts, which makes the Total resistance is also reduced. A Improvement of the ship's quality is achieved through exploitation of the displacer post-flow is reached and recovery the rotational energy from the outflow of the first propeller if a second one is arranged behind it Propellers (contra-rotating propellers).

Another watercraft that is self-contained Pick up drive means and at least one passenger can carry the water, with the hull made of a rotating floating lens that gives it Gives the shape of a saucer is from DE A 31 20 752 known. The hull comprises one arched bottom wall and on the other hand essentially one flat top wall or ceiling. So the lower arched Wall of the hull shaped like a spherical cap have or a middle part in the form of a Spherical cap and a towering on its periphery Border, the generatrix of which is smaller Radius of curvature than the spherical cap has. This Watercraft is primarily used with one on a fixed mast attached to the sail along the The axis of rotation of the hull is arranged on the water to surf. At one in this pre-release The embodiment described is a vertical one Shaft provided in which the perpendicular transmission shaft an outboard motor used with a propeller is.

From EP-A1-0242408 is a sailing boat with a predominantly closed hull, at least one in Boat hull supported mast and one Rudder device known. This sailboat is said to be one high seaworthiness and a hull with high strength, high positional stability and independent erectability capsize. To do this, the shape of the Boat hull determined by cross sections on the Pointed, especially equilateral triangles with form convex curved sides and each in Direction to the bow and stern continuously or roughly reduce to the point size so that the three of the Hit corners of the three corner edges and one around its main axes are largely symmetrical bodies, in particular an ellipsoid arises. The outline of the Boat hull can be viewed in side or top view roughly correspond to an ellipse.

The object of the present invention is a Watercraft with static and dynamic buoyancy too create a high maneuverability with great Has speed that improved Has flow properties due to a reduced Hull resistance and that is inexpensive to manufacture.

Starting from a watercraft closer to the beginning mentioned type the solution to this problem takes place with the in Features specified claim.

Accordingly, a watercraft with static and dynamic buoyancy is provided which is highly maneuverable at high speed; the watercraft has a hull with a lower and an upper half on, furthermore at least one keel and at least one Propulsion, the fuselage in longitudinal section and in the Top view is substantially elliptical. According to the hull is in cross section through the Center of the longitudinal axis essentially also elliptical, the axes of all ellipses unequal are. Preferably, the lower and the upper half of the Fuselage symmetrical.

With the new hull shape for a watercraft, the for example as a motorboat for regatta use, as fast reconnaissance boat in case of defense or also as a surveillance vehicle on busy sea roads Avoiding environmental pollution can be used the advantage of a reduced trunk resistance through the Generation of small entry angles in the submerged bow achieved, as well as the generation of an axial, radial and tangential direction of the uniform wake field while reducing an inclined flow. By improving the flow properties of the Ship hull will also have the advantage of a reduced cavitation and the resulting Noise and vibrations achieved. The watercraft is particularly agile even at high speeds at the same time reduced risk of capsizing.

Figur 1 einen Radialschnitt durch den Mittelpunkt der Längsachse;

Figur 2 einen Axialschnitt entlang der Längsachse; und

Figur 3 eine Draufsicht.

The invention is explained in more detail below with reference to the drawing, in which the watercraft is shown schematically; show it

Figure 1 shows a radial section through the center of the longitudinal axis;

Figure 2 shows an axial section along the longitudinal axis; and

Figure 3 is a plan view.

In the figures, the same parts are the same Provide reference numerals. The designed according to the invention Watercraft with static and dynamic buoyancy provided with a fuselage 1, the bottom with at least one keel 4 is provided, as well as at least a drive 5. On its top is a control or Command stand 3 is intended to accommodate one or more Observer, this control position 3 for example hunting large fish with a weapon 6, such as. B. a harpoon.

As can be seen in Figure 1, in which a radial section the center of the longitudinal axis 2 is shown schematically the hull has a substantially ellipsoidal shape Shape up.

As can be seen in FIG. 2, the fuselage has an axial section along the longitudinal axis 2 also substantially Ellipsoid shape.

Figure 3 shows a plan view of the invention Watercraft, it being apparent from this figure that the shape of the fuselage 1 in the top view is substantially ellipsoidal.

Such a watercraft is simple and inexpensive produced; it is particularly characterized by a high Maneuverability at high speed, making it for a variety of uses is suitable.

Claims (2)

1. A watercraft with static and dynamic buoyancy having high maneuverability along with great speed, having a hull (1) with lower and upper halves, at least one keel (4) and at least one drive, characterized in that the hull (1) is substantially elliptical in longitudinal section and in a plan view, and the hull (1) is substantially likewise elliptical in a cross section through the center of the longitudinal axis (2) and the axes of all ellipses are unequal.
2. A watercraft according to claim 1, characterized in that the lower and upper halves of the hull (1) are symmetric.

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