Patent ID: 7709973
Filing Date: 2010-05-04
Classification: F03D,F05B,Y02E

Abstract:
1. An airborne system for producing electricity from wind energy, comprising: a turbine section comprising: a lifting section connected to a portion of the turbine section for generating a lifting force to cause the turbine section to be airborne at desire altitude; an anchoring section connected by a tether to another portion of the turbine section to anchor the turbine section to a base relative to the earth; and a conductor connected to the turbine section to conduct electricity that is generated by the at least one generator for usage or for energy storage; wherein said turbine section is constructed such that the center of gravity of the turbine section is approximately in the lowest possible position relative to a substantially straight line between a portion of the turbine section that is connected to the lifting section and the another portion of the turbine section that is connected to the anchoring section, while the at least one turbine is in rest; wherein the at least one turbine exposed to wind is rotated and causes rotational torque to be induced on the turbine section, that causes an angular deviation of the center of gravity from lowest possible position; wherein said angular deviation of the center of gravity causes a returning torque that increases with the increasing of the angular deviation; and wherein the returning torque acts on the turbine section, causing the turbine section to reach a stabilized angular position.