Means for improving the performance of planing-type boat hulls
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B63B-001/28
출원번호
US-0826717
(1992-01-28)
발명자
/ 주소
Finkl Anthony W. (445 E. Royal Flamingo Dr. Sarasota FL 34236)
인용정보
피인용 횟수 :
26인용 특허 :
0
초록▼
An improved hydrofoil system is provided for boats with planing-type hulls Two hydrofoils, one mounted adjacent to each chine, are provided in a submerged position. The attack angle of each hydrofoil is controlled independently by a hydraulic cylinder or the equivalent thereof. Because both positive
An improved hydrofoil system is provided for boats with planing-type hulls Two hydrofoils, one mounted adjacent to each chine, are provided in a submerged position. The attack angle of each hydrofoil is controlled independently by a hydraulic cylinder or the equivalent thereof. Because both positive and negative attack angles of each hydrofoil may be presented, the hydrofoil system disclosed has the ability to raise and lower the bow, raise and lower the stern, provide lateral stability and also act as an auxiliary rudder by rotating the boat about its longitudinal axis. The submerged hydrofoil system is intended for use with boats with planing-type hulls.
대표청구항▼
A hydrofoil system with an adjustable angle of attack for a boat with a planing-type hull, the boat further including a transom, a keel and two chines disposed at opposing sides of the transom, the hydrofoil system comprising: two hydrofoils, each hydrofoil mounted on an opposing side of the transom
A hydrofoil system with an adjustable angle of attack for a boat with a planing-type hull, the boat further including a transom, a keel and two chines disposed at opposing sides of the transom, the hydrofoil system comprising: two hydrofoils, each hydrofoil mounted on an opposing side of the transom, near each chine, each hydrofoil including a foot, a control leg, each control leg being disposed between two mounting brackets, and an attack angle adjustment means, the foot having a surface area, the foot being fixable and perpendicularly attached to a bottom edge of the control leg, the bottom edge of the control leg being attached to a middle portion of the foot so that substantially one-half of the surface area of the foot is disposed to a right side of the control leg and substantially one-half of the surface area of the foot is disposed to a left side of the control log, the foot being located below each chine, the control leg and the bottom edge of the control leg being disposed in a vertical plane that is substantially parallel with the keel of the hull, an upper end of the control leg being pivotally attached between the mounting brackets by a pivot bolt, the control leg pivoting about an axis at a substantially right angle to the keel of the hull, the control leg further including an anchor means for accommodating one end of the attack angle adjustment means, the anchor means being disposed on an inboard side of the control leg, the mounting brackets being fixably attached to the transom, the mounting brackets attached to each other by a friction bolt and the pivot bolt, the attack angle adjustment means providing adjustment of the angle of attack of the foot, the attack angle adjustment means including a longitudinally adjustable arm with two ends, one end mounted to the transom, the other end mounted to the anchor means of the control leg, the attack angle adjustment means further including a means for mutually controlling the length of the longitudinally adjustable arm, the attack angle adjustment means further being disposed inboard of the control leg and mounting brackets, each attack, angle adjustment means providing both negative attack angles of the foot and positive attack angles of the foot.
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