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.

An inflatable kite includes a main tube and a sub tube. The inflatable kite includes: a first air chamber, which constitutes the sub tube; a second air chamber, which constitutes the sub tube and which is disposed at a position that is farther from the main tube than from the first air chamber in the sub tube; and a pressure regulator configured to adjust a pressure of the first air chamber and a pressure of the second air chamber. The sub tube cut by one plane that crosses in the direction of extension of the sub tube has a maximal cross-sectional area on a cross section of the first air chamber. The pressure regulator regulates the pressure of the first air chamber to be lower than the pressure of the second air chamber in a steady flight of the inflatable kite.

An inflatable kite system with an internal support structure which allows the kite to be formed into any shape desired. Shapes can include sports team logos, cartoon characters, or any other desired shape. Custom text can be printed as well for advertisement purposes. Preferably, the body is formed from Mylar, also known as BoPET (Biaxially-oriented polyethylene terephthalate), or similar materials to allow for good inflation and structural stability. The kite would be formed of two shaped pieces sealed along their edges and then sealed in multiple patterns along the faces of the two shaped pieces to form internal structural tubes. When these internal structural tubes are inflated, they act as support structures for the kite similar to existing hard-formed kite frames which rely on plastic or wooden sticks. Additional channels for being inflated may also be formed to help the kite float.

A kite leading edge has a tubular structure having a first curve in a span-wise direction and a second curve a chord-wise direction. The tubular structure is formed by a plurality of panels joined together at seams including at least a first longitudinal seam running in the span-wise direction of the tubular structure. At least a portion of the first longitudinal seam defines a first partial helical path about the circumference of the tubular structure.

Methods and devices taught in the present disclosure address the need for improving stability and performance of delta wing kites. Delta wing kites as disclosed include a delta wing shaped sail reinforced with rigid or semi-rigid wing spars and a center spar, the wing spars and central spar being housed and secured within corresponding sleeves. A combination of various elements such as fuselage and corresponding through-holes, front and back pods, keel and top pockets provides improved stability and performance for the disclosed devices.

This invention concerns a line reeling device for reeling front and back lines of a kite. The device includes a reeling mechanism comprising a first reel and a second reel which are located in an enclosure and on which the front and back lines are, in use, wound respectively. The reels are arranged so that their rotation in one direction retracts the lines and their rotation in the other direction deploys the lines. The reeling mechanism further includes reel connecting means which is operable to cause the reels to rotate in harmony in one configuration and rotate independently in another configuration. The reeling mechanism also has a braking mechanism for controlling rotation of the reels and a control mechanism which is in connection with the braking mechanism. The control mechanism is operable between a first, locked position wherein rotation of the reels is obstructed and a second, released position wherein rotation of the reels is allowed.

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.

The invention concerns an airborne device comprising at least three supporting wings and a linking device, the wings being linked to each other by first flexible cables, each wing being further linked to the linking device by a second flexible cable, the linking device being linked to a third flexible cable intended to be linked to a base, the first second, and third cables being tensioned when the airborne device is carried in the wind.