Patent ID: 7662004

Claim:
A flapping foil hydrofoil water craft, comprising in combination: a frame including a mast adapted to extend through a water surface; an elongate submerged structure pivotably coupled to said mast; a front foil extending laterally from said submerged structure forward of said mast; said front foil adapted to pivot relative to said submerged structure to adjust an angle of attack of said front foil; a rear foil extending laterally from said submerged structure rearward of said mast; said rear foil adapted to pivot relative to said submerged structure to adjust an angle of attack of said rear foil; a power plant adapted to pivot said submerged structure relative to said mast; an angle of attack controller coupled to said forward foil and said rearward foil to adjust the angles of attack of said front foil and said rear foil to provide both positive lift and propulsion to carry and drive the water craft; and wherein said angle of attack control includes a control system with input into the control system correlated with a position of said submerged structure and with front and rear foil angle of attack as outputs, said control including front and rear foil angle of attack adjusters for causing the angle of attack of the front and rear foils to match that specified by the control system.