The invention relates to shipbuilding and can be used in reconditioning in order to economize fuel and to increase speed. The technical problem is solved by the shipboard installation of air compressors, air receiver tanks, pass valves, air conduits, air separating conduits, air intakes and air injectors, which are interconnected by air ducts. An air separating conduit is mechanically secured in the bow of the ship and has air injectors secured along the centre thereof up to the stern. The injectors direct a jet of air backwards so that the jet of air thrusts the ship forwards, then the air rises along the sides of the ship, maintaining a layer of air between the ship and the water, thus reducing water resistance. The injectors in the bow direct a jet of air such that the ship is constantly sailing into an air space.

The invention relates to shipbuilding and can be used in reconditioning in order to economize fuel and to increase speed. The technical problem is solved by the shipboard installation of air compressors, air receiver tanks, pass valves, air conduits, air separating conduits, air intakes and air injectors, which are interconnected by air ducts. An air separating conduit is mechanically secured in the bow of the ship and has air injectors secured along the centre thereof up to the stern. The injectors direct a jet of air backwards so that the jet of air thrusts the ship forwards, then the air rises along the sides of the ship, maintaining a layer of air between the ship and the water, thus reducing water resistance. The injectors in the bow direct a jet of air such that the ship is constantly sailing into an air space.

A method for reducing marine growth on a vessel, includes providing an air lubrication system and covering at least a part of the hull with air bubbles. Also described is a vessel having an air lubricating system with releasable connection of the deflectors across the cavity, a closeable outlet valve in the air outlet duct, connection of a compressor to each cavity or pair of cavities and an air inlet opening in the top of the cavity.

A method for reducing marine growth on a vessel, includes providing an air lubrication system and covering at least a part of the hull with air bubbles. Also described is a vessel having an air lubricating system with releasable connection of the deflectors across the cavity, a closeable outlet valve in the air outlet duct, connection of a compressor to each cavity or pair of cavities and an air inlet opening in the top of the cavity.

The invention provides a solution for inadequate boundary layer testing methods. The invention includes a uniquely configured multi-module concentric loop cycling water past a testing module to obtain real-time values and variables to use in CFD calculations. The invention is comprised of various sections, specifically designed to support the entire system. The system includes: one or more water reservoirs/degassing tanks, high-capacity water pumps, water stream straightener(s), stable flow section, air induction ports, viewing ports, test modules containing test surfaces designed to measure friction and pressure of a passing water or air/water stream. The present invention includes one or more sensors on the test surface(s) that convey conditions to one or more computers that may receive, store, process and send interpretations to one or more visual monitors on or near the invention in real time.

The invention provides a solution for inadequate boundary layer testing methods. The invention includes a uniquely configured multi-module concentric loop cycling water past a testing module to obtain real-time values and variables to use in CFD calculations. The invention is comprised of various sections, specifically designed to support the entire system. The system includes: one or more water reservoirs/degassing tanks, high-capacity water pumps, water stream straightener(s), stable flow section, air induction ports, viewing ports, test modules containing test surfaces designed to measure friction and pressure of a passing water or air/water stream. The present invention includes one or more sensors on the test surface(s) that convey conditions to one or more computers that may receive, store, process and send interpretations to one or more visual monitors on or near the invention in real time.

A frictional resistance-reducing device and a ship including the same are disclosed. The ship comprises: an outer panel including and air outlet; a plurality of reinforcement members provided on the inner surface of the outer panel so as to be spaced from each other; and a frictional resistance-reducing device formed on the inner surface of the out panel between immediately neighboring reinforcement members among the plurality of reinforcement members, so as to cover the air outlet, wherein the frictional resistance-reducing device includes: a hollow housing of which one surface is opened; and an air inlet formed in the houseing, and the opened one surface faces the air outlet.

A frictional resistance-reducing device and a ship including the same are disclosed. The ship comprises: an outer panel including and air outlet; a plurality of reinforcement members provided on the inner surface of the outer panel so as to be spaced from each other; and a frictional resistance-reducing device formed on the inner surface of the out panel between immediately neighboring reinforcement members among the plurality of reinforcement members, so as to cover the air outlet, wherein the frictional resistance-reducing device includes: a hollow housing of which one surface is opened; and an air inlet formed in the houseing, and the opened one surface faces the air outlet.

A boat hull, comprising a plurality of chines extending downwardly from a bow of the hull towards a stern of the hull, each chine in transverse cross section being substantially straight and substantially horizontal and arranged so that a centreline of each chine lies in a plane which is parallel to a central plane of an adjacent chine, wherein collectively the chines in a lower forward portion of the hull are arranged generally V shaped in cross section and wherein an aft portion of a base of the hull is generally flat and each chine terminates at the flat aft portion.

A ship hull microbubble system is adapted to reduce drag on a ship hull traveling through water. The ship hull microbubble system includes a ballast pump, mechanically coupled to a ballast main pipe which is further connected to a forward peak tank with a forward peak tank valve. A venturi injector is joined to the ballast main pipe with a riser pipe. A discharge pipe is joined to the venturi injector and further piercing the ship hull. An air water mixture is formed when water pulled into the ballast pump receives air from the venturi injector. Discharging the air water mixture through the discharge pipe creates a plurality of microbubbles against the ship hull that reduces the drag on the ship hull when travelling through water.