The present invention refers to an airborne system (100) and in particular to an airborne power generation system (100). The airborne power generation system (100) comprises an airborne unit (10) configured (i) as an aerial vehicle (10), in particular as a kite or a multicopter, and (ii) to harvest and convert wind power into electrical power, a ground unit (50) configured to send and/or receive electrical power to and from the airborne unit (10), respectively, and a coupling and tether unit (30) for mechanically and electrically coupling the airborne unit (10) to the ground unit (50) and configured to transmit electrical power between the airborne unit (10) and the ground unit (50). The airborne unit (10) comprises a plurality of motor/generator units (12) each of which having a wind harvesting/propelling rotor (14) mechanically coupled thereto and groups (16) of motor/generator units (12) and their assigned electrical transmission paths are electrically and/or galvanically uncoupled, insulated, isolated and/or separated with respect to each other at least in the airborne unit (10) and the coupling and tether unit (30).

Disclosed is a collapsible kite frame that permits at kite to be fit into an economical shipping box, thereby significantly decreasing the costs associated with shipping. The kite frame utilizes a double revolute joint to connect the support members of a kite frame. A support sheath locks the joint and support members in a straight alignment, but, when removed, the support members are free to rotate and move inward, towards each other, thereby shortening the combined length span of the support members when in a straight alignment.

Disclosed is a collapsible kite frame that permits at kite to be fit into an economical shipping box, thereby significantly decreasing the costs associated with shipping. The kite frame utilizes a double revolute joint to connect the support members of a kite frame. A support sheath locks the joint and support members in a straight alignment, but, when removed, the support members are free to rotate and move inward, towards each other, thereby shortening the combined length span of the support members when in a straight alignment.

A device for a traction kite for generating electricity by means of wind force, wherein exact horizontal positioning of a traction kite or of a group of interconnected traction kites or rotating flyer wheels is made possible in that obliquely braced additional traction ropes 4 at the edges of this traction kite group permit a fixed position of the traction kite, similar to when bracing domestic tents.

A device for a traction kite for generating electricity by means of wind force, wherein exact horizontal positioning of a traction kite or of a group of interconnected traction kites or rotating flyer wheels is made possible in that obliquely braced additional traction ropes 4 at the edges of this traction kite group permit a fixed position of the traction kite, similar to when bracing domestic tents.

A command and control bar for a kite sail associated with two front cables connected to a user and two rear cables connected to the bar. The cables are connected at one end to the sail. An adjustment element to shorten/extend the rear cables is incorporated into the bar and can be controlled by the user without releasing the bar. A deflection system can be displaced parallel to the axis of the bar and is connected to a return element. The bar includes a locking element to lock/release the position of the deflection system along the bar, depending on the traction forces applied on the cables. The locking element is accessible to the user from outside the bar.

An adjustable shape kite has a wing of a flexible material and an adjustable bridle system. The wing is a single layer wing that does not include structural support to provide its shape during flight. The bridle system is adjustable to adjust the wing curvature during flight. An aerodynamic shape is formed in the wing with a leading edge and side edges being rolled over by oncoming wind acting against the wing in conjunction with tensile forces acting thereon by the bridle lines of the bridle system.

An adjustable shape kite has a wing of a flexible material and an adjustable bridle system. The wing is a single layer wing that does not include structural support to provide its shape during flight. The bridle system is adjustable to adjust the wing curvature during flight. An aerodynamic shape is formed in the wing with a leading edge and side edges being rolled over by oncoming wind acting against the wing in conjunction with tensile forces acting thereon by the bridle lines of the bridle system.

In a system of the disclosure, power generation devices installed at separate places include a kite-shaped flying object staying in the air, a generator installed on a ground and a tether operatively connecting the two to each other. The tether, which is pulled when the kite-shaped flying object rises, rotates a rotor of a generator to generate power. A power supply controller controls power supply such that, when power suppliable from a power generation device meets a target power needed by a power receiving facility, power is supplied from the power generation device to the power receiving facility, and when the target power of the power receiving facility exceeds the power suppliable from the power generation device, power from another power generation device is supplied to the power receiving facility.