Ships – Apparatus held by or attached to rider to control sailboard... – Foot strap means
Patent
1989-07-27
1990-11-20
Basinger, Sherman
Ships
Apparatus held by or attached to rider to control sailboard...
Foot strap means
114126, 114135, 114136, 114142, 114143, B63B 128
Patent
active
049709798
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a sailing yacht with a three point wing system for buoyancy, steering, and stabilizing.
BACKGROUND INFORMATION
Sailing yachts, especially high performance sailing yachts, are constructed advantageously with regard to the utilization of the wind forces, minimizing the water drag and with regard to the steerability and the stabilizing. It is desirable that the respective characteristics of known sailing yachts should be further improved.
OBJECTS OF THE INVENTION
It is an object of the invention to construct a sailing yacht in such a manner, that it exhibits marked improvements regarding the utilization of the wind forces, minimizing the water drag and with regard to the steerability and the stabilizing as compared to conventional solutions.
SUMMARY OF THE INVENTION
The sailing yacht according to the invention comprises a ship's hull and a sail held by a sectional mast, wherein the ship's hull has a canard rudder and two rolling keels. Each rolling keel has a ballast container. The canard rudder and each rolling keel has wings forming a three point wing system for producing buoyancy, for steering, and for stabilizing. The three point wing system is formed substantially by a fore wing and two aft wing pairs. The fore wing is constructed as an end wing of the canard rudder. The aft wing pairs are arranged in a similar manner at the ends of the rolling keels. Each aft wing pair has a long wing member and a short wing member to form said aft wings as pairs of asymmetric wings. The rolling keels are constructed to be tiltable about rotational axes extending approximately parallel to the hull axis. The ballast is displaceable between two ballast containers.
BRIEF DESCRIPTION OF THE DRAWING
The single FIGURE shows a perspectiv view of the present sailing yacht.
DETAILED DESCRIPTION OF A PREFERRED EXAMPLE EMBODIMENT
The FIG. shows perspectively a sailing yacht 1 in a configuration sailing close to the wind, comprising essentially a hull body 2, a sail 3, held by a sectional mast 4 in a manner known as such. A canard rudder 8 is mounted below the bow 5 fore of aft wings 11, 11'. A control wing 9 is located at the lower end of the canard rudder 8. The spinnaker customarily used for sailing before the wind and additional special sails for space wind and half wind courses are not shown here. Rolling keels 10, 10' are secured laterally to the hull body 2 in a tiltable manner about tilting axes 10a and 10b extending approximately in parallel to the hull axis A. Each rolling keel 10, 10' can be tilted from an approximately vertical position in which it dip's into the water, into an approximately horizontal position in which it is normally above the water and vice versa. A pair 11, 11' of wings is arranged at each of the outer ends of the rolling keels 10, 10' in the manner of end disks. Each wing pair 11, 11' comprises a long wing section 14, 14' arranged to normally reach downwardly from the respective rolling keel 10, 10' and a short wing section 13, 13' arranged to normally reach upwardly from its rolling keel. The short wing section and the long wing section are arranged opposite each other and form an asymmetric wing pair. Each long wing section 14, 14' has a wing end disk 15, 15' at its tip. The wing pairs 11, 11' form together with the control wing 9 a steerable three point lift producing wing system, whereby especially the wing 9 serves for the pitch and longitudinal trim control. When the rolling keels 10, 10' are in a lateral keel operation position, they produce a controllable hydrodynamic lift. Due to this lift producing effect the friction drag and wave drag on the sailing yacht are reduced in a known manner.
In the drawing the windward rolling keel 10, 10' is shown tilted up in its full line position. In this position the entire rolling keel 10 is located above the water surface, whereby, however, the long wing section 14 dips partially into the water so that now its end disk 15 functions as a hydrodynamic lift and control element. The wing end di
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Basinger Sherman
Brahan Thomas J.
Fasse W. G.
Kane, Jr. D. H.
Messerschmitt-Boelkow-Blohm GmbH
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