A foil displacement system includes one or more foils that can be deployed and stowed. When deployed, each foil can exert downforce or uplift depending on its orientation. For example, each foil may be positioned to have an angle of attack that creates a downward force effectively transmitted to the hull to pull the hull deeper within the water to, for example, create a larger wake. Use of the foil displacement system can enhance or replace the use of a ballast tank system, can be integrated into a new boat or retrofitted to existing boats, can be electronically or manually positioned, can enhance activities such as wake surfing, wake boarding, water skiing or other similar or related water sports.

A Method and Apparatus for Motorized Sit Down Hydrofoil have been disclosed. By using a seat with a seatbelt and bindings to secure a rider to a top of a board having a hydrofoil assembly on the bottom of the board a rider can be protected from drowning due to an overturned board.

A boat for operation in water has a hull longitudinally extending between a bow and a stern and laterally extending between a port side and a starboard side, a hydrofoil suspended from the hull, wherein as the boat moves through the water the hydrofoil is configured to create a lifting force for lifting the hull upwardly out of water, and a weed deflector located between the hydrofoil and the bow, wherein the weed deflector is configured to deflect weeds away from the hydrofoil.

A foil displacement system includes one or more foils that can be deployed and stowed. When deployed, each foil can exert downforce or uplift depending on its orientation. For example, each foil may be positioned to have an angle of attack that creates a downward force effectively transmitted to the hull to pull the hull deeper within the water to, for example, create a larger wake. Use of the foil displacement system can enhance or replace the use of a ballast tank system, can be integrated into a new boat or retrofitted to existing boats, can be electronically or manually positioned, can enhance activities such as wake surfing, wake boarding, water skiing or other similar or related water sports.

An impact-energy tolerant method and structures for impact-energy absorption and penetration resistance are disclosed. A body comprising a body end, and a fiber band comprising supplemental attachment sites located between an inner wall and an outer wall of the body end.

A boat for operation in water has a hull longitudinally extending between a bow and a stern and laterally extending between a port side and a starboard side, a hydrofoil suspended from the hull, wherein as the boat moves through the water the hydrofoil is configured to create a lifting force for lifting the hull upwardly out of water, and a weed deflector located between the hydrofoil and the bow, wherein the weed deflector is configured to deflect weeds away from the hydrofoil.

Safety strut assembly (9) for a hydrofoil craft (1) comprising a strut (12), which is attached to the hull (10) of the craft by means of a transverse oriented strut axle (40) for pivotal movement with respect to the hull, the assembly further comprising: a control rod (33) passing down through the strut (12); a linear actuator assembly (28); a hydrofoil (13) pivotally mounted to the bottom portion of the strut (12) about a transverse oriented foil axle (35); first linkage means (34) connecting the hydrofoil (13) to the control rod (33); wherein the first linkage means (34) comprises a first drive ring (48) mounted around the foil axle (35), wherein the first drive ring is provided with one first ring cam element (45), and wherein the foil axle (35) is provided with one foil axle cam element (46).

A hydrofoil apparatus includes a pair of hydrofoil modules each including a clamp bracket, a swivel bracket, a wing including a hydrofoil, and a rotation actuator. In a reference state in which angles of attack of the hydrofoils of the pair of hydrofoil modules are the same as each other, a first rotation shaft is located forward of a center of an area of the hydrofoil.