The subject of the invention is an arrangement for displaying the airflow conditions around the sails, including a wind sensing device (200a, 200b, 200c, 450), a central device (600) and a signal transmission device (300a, 300b), and at least one of the wind sensing devices (200a, 200c, 450) being a built-in wind sensor device fixed on the sail (200a, 200b, 200c). It is characterized in that the built-in wind sensor device (200a, 200b, 200c) is connected to the central device (600) and contains electronic units. The process for the application of the arrangement is also a subject of this invention.

A power generation sailing ship has a sail provided on a deck, a water turbine connected to a front end of a shaft passing through a bow part outer hull and extending forward, a power generator disposed in a front body of the sailing ship and connected to a rear end of the shaft, and an energy storage device for directly storing electric energy generated by the power generator or converting the electric energy into energy of a substance and storing the substance.

A power generation sailing ship has a sail provided on a deck, a water turbine connected to a front end of a shaft passing through a bow part outer hull and extending forward, a power generator disposed in a front body of the sailing ship and connected to a rear end of the shaft, and an energy storage device for directly storing electric energy generated by the power generator or converting the electric energy into energy of a substance and storing the substance.

The invention relates to boat building and can be used in the building and modification of sea-going high-speed keeled monohull sailboats or sail and motor boats with a high sail power to weight ratio, where a single, narrow, wave-penetrating displacement hull is used. To provide for the stable controlled movement of a keeled monohull sailboat or sail and motor boat in wave penetration mode, i.e. in a low wave/hydrodynamic resistance displacement mode, both when heeling and when upright (at the same time effectively counteracting heeling and rocking on all courses), and to provide for the damping of the energy of a broken wave and also for the ability of the boat to self-right to an even keel from a sail-on-water position, a stabilized hull for a keeled monohull sailboat or sail and motor boat is configured with an overall width of not more than 50% of the length of the hull and has, in the bottom part thereof, a vertically oriented narrow section (4) of low wave/hydrodynamic resistance, which runs longitudinally along the full length of the boat, is symmetrical about the centreline thereof and has a displacement segment (5) comprising a keel (8) with a heavy bulb, wherein the displacement of the segment is equal to the full unladen weight of the boat. The hull further comprises two narrow longitudinally oriented sponsons (6 and 7), arranged symmetrically in relation to the centreline of the boat, which do not bear the weight of the boat and which have a streamlined shape of low wave/hydrodynamic resistance. Said sponsons are situated above the waterline at the maximum width of the hull, forming two tunnel cavities (10) above the waterline to dampen the energy of a wave broken by the bow and the sponsons.

A marine vessel can be propelled by using wind or solar energy. This propulsion results in the forward movement and six degrees of motion (roll, heave, pitch, yaw, surge, and sway) of the marine vessel. This invention capitalizes on the fact that solar, wind and wave energy are cyclical by nature. The present invention enables the vessel to manage stored and harvested energy from these energy sources and use the stored energy during periods when the external natural sources of energy are not available in adequate quantities to maintain a reasonable speed of advance for the marine vessel. The vessel's natural energy management system (NEMS) manages it in such a way that harvesting of the energy during high energy cycles, storing it and using it when needed during low external energy cycles, allows a marine vessel to maintain faster average speed without reliance on any fossil or chemical fuel and by only using renewable energy sources.

The present invention relates broadly to an unmanned surface vessel (10) comprising a hull (12), an underwater appendage (14), a winch (16), and a cable or rope (18). The cable or rope (18) is at its distal end attached to a remote device (20) with the cable or rope (18) arranged to cooperate with the winch (16) to be deployed and retrieved from the vessel (10) via operation of the winch (16). The underwater appendage is in the form of a keel including a cavity (22) designed to partly locate the winch (16).

An oblong stiffening member such as a sail batten having a tapered geometry formed by a pair of parallely spaced apart oblique circular cones interconnected by a webbing strip. The member can be made from a unitary piece of fiber composite material such as a carbon fiber infused polymer wherein the orientations of the fibers are varied to provide both bending and torsional strength and stiffness that varies along the length of the member. Such properties can be useful in sail battens due to the rigorous dynamical forces subjected to such structures.

An aerodynamic tailfin rotatably attached to a shaft-shaped member disposed on a vehicle. The tailfin swivels about the round shaft-shaped member for reduced drag in response to winds varying in direction impinging thereon.

Propulsion apparatus for an aquatic vessel comprises an aerodynamic body which extends along a longitudinal axis between first and second ends and in a transverse direction between a leading edge and trailing edge. The aerodynamic body has one or more external wind-receiving surfaces which extend between the leading edge and the trailing edge, thereby defining an aerodynamic profile of the aerodynamic body in cross-section substantially perpendicular to the longitudinal axis. The propulsion apparatus further comprises at least one air vent and at least one air flow generator configured to expel air through the at least one air vent. The at least one air vent and/or the at least one air flow generator are configured to direct expelled air across at least a portion of the one or more or more external wind-receiving surfaces.

In one embodiment, a method that receives a manifest for plural encoded representations of a single content stream, each representation fragmented into plural chunks, each representation comprising a different quality level, the manifest listing a plurality of representations, each representation comprising the plural chunks at one of a plurality of quality levels, and requests one of the plural chunks based on selection of one of the plurality of quality levels explicitly indicated in the manifest.