Abstract: A device for reducing frictional resistance includes: a chamber which is provided to a draft part of a hull and in which blowing holes blowing out air into the water of the outside of the hull from different positions to each other in a height direction of the hull are formed; a supply pipe supplying the air to an internal space of the chamber; and a distributor provided to each of the blowing holes, and guiding a part of the air, which was supplied inside the chamber from the supply pipe, to each of the blowing holes. The plurality of distributors has a flow-amount adjuster adjusting a flow amount of the air guided to the blowing hole corresponding to each of the distributors so that the flow amount of the air blown out from the plurality of blowing holes is equalized in each of the blowing holes.

Abstract: A device for reducing frictional resistance includes: a chamber which is provided to a draft part of a hull and in which blowing holes blowing out air into the water of the outside of the hull from different positions to each other in a height direction of the hull are formed; a supply pipe supplying the air to an internal space of the chamber; and a distributor provided to each of the blowing holes, and guiding a part of the air, which was supplied inside the chamber from the supply pipe, to each of the blowing holes. The plurality of distributors has a flow-amount adjuster adjusting a flow amount of the air guided to the blowing hole corresponding to each of the distributors so that the flow amount of the air blown out from the plurality of blowing holes is equalized in each of the blowing holes.

Abstract: An air ejecting unit is configured to eject air into water from an air ejecting outlet provided in a ship bottom of a ship body. An air recovery device is configured to recover the air into the ship body from first to third air recovery inlets provided in the ship bottom. The first air recovery inlet is provided to cross the center line. The second air recovery inlet is provided to project on a port side from the first air recovery inlet. The third air recovery inlet is provided to project on a starboard side from the first air recovery inlet. The second and third air recovery inlets are arranged on a bow side from the first air recovery inlet. Each of the first to third air recovery inlets includes a plurality of air recovery holes.

Abstract: An air ejecting unit is configured to eject air into water from an air ejecting outlet provided in a ship bottom of a ship body. An air recovery device is configured to recover the air into the ship body from first to third air recovery inlets provided in the ship bottom. The first air recovery inlet is provided to cross the center line. The second air recovery inlet is provided to project on a port side from the first air recovery inlet. The third air recovery inlet is provided to project on a starboard side from the first air recovery inlet. The second and third air recovery inlets are arranged on a bow side from the first air recovery inlet. Each of the first to third air recovery inlets includes a plurality of air recovery holes.