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.

Flying artefact and its device for aerial advertising to be pulled from the surface or tied up to a fixed point, which includes an element of elevation and suspension in the air (1) with advertising medium function, built in a very light and resistant material, with the shape of an aerodynamic profile, which has an opening (4) at its front part reinforced with light and resistant tubes, and an opening (5) on its back, which has a curved upper surface (6) and a flat lower surface (7), and which acquires its shape when the air passes through its four walls; a pulling or clamping line (3) which is tied up to the chosen pulling means or fixed point; at least two ropes (2) that connect the pulling or clamping line (3) with the front opening (4); the advertising material being placed on both sides and all along the element of elevation and suspension (1).

A traction kite anchor device has a base provided at an end of at least one kite line and a release member able to move relative the base by a hand of a user of the kite. A trip arm is pivotally connected to the base to move between a first rotational position relative the base and a second rotational position relative to the base. The trip arm carries a latch that can lock and release a catch of a chicken loop upon moving the release member relative the base.

A traction kite anchor device has a base provided at an end of at least one kite line and a release member able to move relative the base by a hand of a user of the kite. A trip arm is pivotally connected to the base to move between a first rotational position relative the base and a second rotational position relative to the base. The trip arm carries a latch that can lock and release a catch of a chicken loop upon moving the release member relative the base.

A single tow point box kite is presented that includes a single piece fabric canopy having a pair of sails connected via sleeves. The pair of sails are maintained in a drum-tight fashion to form a quadrangular configuration via a demountable frame that includes a plurality of spars projecting between the sails and through respective sleeves, with respective opposite extremities of the spars received in respective pockets of the fabric canopy, and struts projecting between pairs of spars. Sides of the quadrangular configuration are thus joined at corners defined by interaction of each of the plurality of spars of the demountable frame with respective pockets and sleeves of the canopy. Also presented is a method for making the box kite canopy, including selecting first and second sails, defining lines of respective corners of the sails, forming fabric pockets along the lines of the respective corners at edge regions of the respective sails, making fabric loops, connecting the fabric loops to the respective sails along the lines of the respective corners at edge regions of the respective sails opposite the pockets, forming fabric sleeves to extend between the sails and sized to receive respective spars, and connecting the fabric sleeves to the sleeves via respective fabric loops.

A single tow point box kite is presented that includes a single piece fabric canopy having a pair of sails connected via sleeves. The pair of sails are maintained in a drum-tight fashion to form a quadrangular configuration via a demountable frame that includes a plurality of spars projecting between the sails and through respective sleeves, with respective opposite extremities of the spars received in respective pockets of the fabric canopy, and struts projecting between pairs of spars. Sides of the quadrangular configuration are thus joined at corners defined by interaction of each of the plurality of spars of the demountable frame with respective pockets and sleeves of the canopy. Also presented is a method for making the box kite canopy, including selecting first and second sails, defining lines of respective corners of the sails, forming fabric pockets along the lines of the respective corners at edge regions of the respective sails, making fabric loops, connecting the fabric loops to the respective sails along the lines of the respective corners at edge regions of the respective sails opposite the pockets, forming fabric sleeves to extend between the sails and sized to receive respective spars, and connecting the fabric sleeves to the sleeves via respective fabric loops.

This application describes systems, methods, and devices to enhance the safety and functionality of unmanned rotorcraft by improving reliability, transparency, operational capabilities, and effectiveness. Embodiments include integration of rotorcraft with objects attached to the ground (including kites, balloons, or elevated structures) in order to create safe and visible sky moorings from which devices such as cameras on the craft can operate for extended periods of time while remote control can be used to move and stabilize the camera and/or the kite or balloon to which it is attached. In addition, the rotorcraft in such sky moorings can be enclosed for protection, can employ connections for systems maintenance, and can utilize changeable payload modules having supplies that the rotorcraft can dispatch or use in various contexts such as emergency situations or to provide security at venues with large gatherings of people, such as concerts.

This application describes systems, methods, and devices to enhance the safety and functionality of unmanned rotorcraft by improving reliability, transparency, operational capabilities, and effectiveness. Embodiments include integration of rotorcraft with objects attached to the ground (including kites, balloons, or elevated structures) in order to create safe and visible sky moorings from which devices such as cameras on the craft can operate for extended periods of time while remote control can be used to move and stabilize the camera and/or the kite or balloon to which it is attached. In addition, the rotorcraft in such sky moorings can be enclosed for protection, can employ connections for systems maintenance, and can utilize changeable payload modules having supplies that the rotorcraft can dispatch or use in various contexts such as emergency situations or to provide security at venues with large gatherings of people, such as concerts.

An example system includes a ground station, an aerial vehicle, a tether, a probe, and a control system. The tether includes a core having a strength member as well as an electrical conductor that is wound around the core. The probe is attached to the strength member so that the probe is able to measure an electrical property of at least a portion of the strength member. The control system is configured to measure the electrical property along the strength member at a predetermined measurement rate and also determine that the electrical property is outside a predetermined range. Based on the electrical property, damage to the tether core can be assessed.

An example system includes a ground station, an aerial vehicle, a tether, a probe, and a control system. The tether includes a core having a strength member as well as an electrical conductor that is wound around the core. The probe is attached to the strength member so that the probe is able to measure an electrical property of at least a portion of the strength member. The control system is configured to measure the electrical property along the strength member at a predetermined measurement rate and also determine that the electrical property is outside a predetermined range. Based on the electrical property, damage to the tether core can be assessed.