A surfboard with an electric drive (2), a battery for the electric drive (2), said battery being arranged in a battery housing (3), a first recess (4) for the battery housing (3), and a handle (5) on the battery housing (3), wherein the handle (5) is designed as a bracket handle which is mounted pivotably around a respective centre of rotation (21) at each of the handle ends on opposite sides (6) of the battery housing (3), and in each case a lug (9) protrudes from the base side of the recess below the centres of rotation (21) inside the first recess (4), and at each handle end of the bracket handle a second projection (33) is formed, which has a curved edge (34) and which rests on the lug, and a distance between a contact point of the curved edge (34) with the lug (9).

A surfboard with an electric drive (2), a battery for the electric drive (2), said battery being arranged in a battery housing (3), a first recess (4) for the battery housing (3), and a handle (5) on the battery housing (3), wherein the handle (5) is designed as a bracket handle which is mounted pivotably around a respective centre of rotation (21) at each of the handle ends on opposite sides (6) of the battery housing (3), and in each case a lug (9) protrudes from the base side of the recess below the centres of rotation (21) inside the first recess (4), and at each handle end of the bracket handle a second projection (33) is formed, which has a curved edge (34) and which rests on the lug, and a distance between a contact point of the curved edge (34) with the lug (9).

A surf craft includes: a body having a nose and a tail; a bottom surface extending from the nose of the body to the tail of the body; a channel formed in the bottom surface of the body, the channel including a channel entrance located towards the nose of the body having a depth that is substantially flush with the bottom surface of the surf craft, a channel exit having a depth such that a bottom surface of the channel curves from the bottom surface of the surf craft towards an upper surface of the surf craft, first and second opposing sidewalls. The first and second opposing sidewalls curve outwards along a substantial portion of the channel such that a width of the channel exit is wider than a width of the channel entrance.

A surf craft includes: a body having a nose and a tail; a bottom surface extending from the nose of the body to the tail of the body; a channel formed in the bottom surface of the body, the channel including a channel entrance located towards the nose of the body having a depth that is substantially flush with the bottom surface of the surf craft, a channel exit having a depth such that a bottom surface of the channel curves from the bottom surface of the surf craft towards an upper surface of the surf craft, first and second opposing sidewalls. The first and second opposing sidewalls curve outwards along a substantial portion of the channel such that a width of the channel exit is wider than a width of the channel entrance.

A hydrofoil for a user on a body of water includes a fuselage with a V-shaped front wing and a rear stabilizer. A mast has a lower end projecting upwardly from the fuselage and an upper end fixed with an elongated deck such that the deck is parallel to the fuselage. In use, the user is pulled forward in the body of water by either a towing device, an impeller device, wave swells, or the like, such that the front wing, through hydrofoil action, raises the deck above a surface of the water. As the deck raises higher above the water, the distal tips of the front wing surface and lose lift, stabilizing the elevation of the deck above the water.

A hydrofoil for a user on a body of water includes a fuselage with a V-shaped front wing and a rear stabilizer. A mast has a lower end projecting upwardly from the fuselage and an upper end fixed with an elongated deck such that the deck is parallel to the fuselage. In use, the user is pulled forward in the body of water by either a towing device, an impeller device, wave swells, or the like, such that the front wing, through hydrofoil action, raises the deck above a surface of the water. As the deck raises higher above the water, the distal tips of the front wing surface and lose lift, stabilizing the elevation of the deck above the water.

A watercraft system including one or more air passageways and/or one or more water passageways is provided. The air passageways may extend from an upper surface of the watercraft, through the body of the watercraft, to an underneath surface of the watercraft. The water passageways may extend from an underneath forward or side portion on the watercraft, through the body of the watercraft, to a rear portion of the watercraft. The air and/or water passageways may be constricting from the inlets to the outlets so that the air and/or water is accelerated through the passageways during use of the craft. In this way, the release of the accelerated air and/or water decreases the craft's drag and provides the craft a forward thrust.

A watercraft system including one or more air passageways and/or one or more water passageways is provided. The air passageways may extend from an upper surface of the watercraft, through the body of the watercraft, to an underneath surface of the watercraft. The water passageways may extend from an underneath forward or side portion on the watercraft, through the body of the watercraft, to a rear portion of the watercraft. The air and/or water passageways may be constricting from the inlets to the outlets so that the air and/or water is accelerated through the passageways during use of the craft. In this way, the release of the accelerated air and/or water decreases the craft's drag and provides the craft a forward thrust.

A surf craft includes: a body having a nose and a tail; a bottom surface extending from the nose of the body to the tail of the body; a channel formed in the bottom surface of the body, the channel including a channel entrance located towards the nose of the body having a depth that is substantially flush with the bottom surface of the surf craft, a channel exit having a depth such that a bottom surface of the channel curves from the bottom surface of the surf craft towards an upper surface of the surf craft, first and second opposing sidewalls. The first and second opposing sidewalls curve outwards along a substantial portion of the channel such that a width of the channel exit is wider than a width of the channel entrance.

A surf craft includes: a body having a nose and a tail; a bottom surface extending from the nose of the body to the tail of the body; a channel formed in the bottom surface of the body, the channel including a channel entrance located towards the nose of the body having a depth that is substantially flush with the bottom surface of the surf craft, a channel exit having a depth such that a bottom surface of the channel curves from the bottom surface of the surf craft towards an upper surface of the surf craft, first and second opposing sidewalls. The first and second opposing sidewalls curve outwards along a substantial portion of the channel such that a width of the channel exit is wider than a width of the channel entrance.