Patent ID: 7263939

Claim:
A method for sailing that utilizes the power of only a wind to sail on various chosen courses including courses that are angled into the wind the method comprising: (a) providing an elevated unit comprising: i. a streamlined blimp containing a lighter than air gas; ii. a wing or sail for generating aerodynamic lift by action of the wind only; iii. stabilizing means for providing aerodynamic stabilization for said elevated unit so that said blimp is oriented into the wind for minimum drag and said wing or sail is oriented into the wind with a desired angle of attack; iv. tilting means for tilting said wing or sail or for tilting said elevated unit about a horizontal axis that is parallel to the direction of the wind so that said wing or sail remains oriented into the wind but is inclined at an angle so that the lift generated by said wing or sail has both a vertical and a horizontal, or lateral, component and so that said wing or sail may be tilted from one side to the other for tacking; v. structural means for connecting the components of said elevated unit together and transferring the forces between them; (b) providing a surface unit comprising: i. a boat or other vehicle that is able to traverse the Earth's surface and support a payload; ii. a lateral force resisting means; (c) providing a flexible tension member or tether, connecting said elevated unit and said surface unit; (d) tilting said elevated unit about the longitudinal axis so that said wing generates a lateral propulsive force from the wind only, in addition to a dynamic lifting force; and (e) allowing the wind to impinge on said wing, thereby allowing said elevated unit to generate a predominately lateral force by action of the wind only, which is substantially, but not entirely, opposed by a lateral resisting force generated by said surface unit, by action of the Earth's surface, so that a propulsive force is produced, and thereby utilizing the power of only the wind to sail on a chosen course including a course that is angled into the wind.