Technische Universiteit Delft

Jan Alexander Keuning

The invention concerns a vessel having a planing surface and a transom at a stern of the vessel, mounted on the transom is an interceptor and an actuator to move the interceptor in vertical direction. In accordance with the invention the transom defines a sharp edge with the planing surface and the underside of the interceptor comprises a convex rounded edge extending upwards to the rear with a leading edge of the convex rounded edge having a tangent approximately parallel to the water flow along the planing surface near the transom, and/or the transom defines a convex rounded edge with the planing surface with a leading edge of the convex rounded edge being tangent to the planing surface and the interceptor defines at its lowest part a sharp edge that can move behind the convex rounded edge in vertical direction.

Vessel with improved motion control

A ship whereby the hull and the mechanical propulsion device are designed such that the Froude number is larger than 0.5. In the aft ship the hull has a bottom with V-shaped bottom surfaces with a deadrise angle that is less than 40 degrees and the hull has substantially vertical sides. In the hull are a passenger compartment and a trim tank. The trim tank volume is such that the weight of a filled trim tank is more than 30% of the weight of displacement of the hull with an empty trim tank, filling the trim tank with water increases the amidships immersed width with at least 10%, and the bottom surfaces have bilge keels fully immersed when the trim tank is filled with water and the bilge keels are at least in part above the water level when the trim tank is empty.

Fast ship

A method for maintaining the heading of a ship during movements caused by waves approaching the ship from a stern direction by activating a control surface in a bow of the ship such that the control surface converts a water flow along the bow into a lateral force that opposes roll, yaw, or heeling movements and course changes.

Method for maintaining the heading of a ship

A ship for use at high speed and/or heavy seas having a single long and slender hull, a sharp bow and the aft end of the hull has a flat or slightly V-shaped bottom with at least one aft rudder, and at least one propeller or water jet for propulsion whereby the foreship has a draught that is equal or more than the draught of the aft end. The bow has a control surface that converts the water flow along the forward moving ship into an adjustable lateral force.

Ship

A ship designed for use at high speed and heavy seas having a single long and slender hull with a narrow beam and a more or less vertical bow, whereby the front half of the hull has more or less vertical sides, minimal flare in the bow sections and towards the bow an increase in draught at its center line combined with a more or less similar increase of freeboard and whereby the aft end of the hull has a flat or slightly V-shaped bottom with one or more propellers and/or waterjets as propulsion means. In accordance with the invention the bow has a fillet radius of at least 1% of the beam.

Growing community of inventors

Willemstad, Netherlands

Jan Alexander Keuning