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 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.

A control device for controlling a kite steering arrangement, including a base, a control bar support extending downward on the base, a control bar pivot point mounted displaceably about the control bar support, a pair of interconnecting members extending between opposing end regions of the control bar and the base upper the control bar support, a tensioning mechanism, a base pivot point, a base rotator for allowing rotation of the base about a vertical axis thereof, a manipulator that manipulates the base pivot point and base rotator, and a communicator, that communicates adjustment of the interconnecting members to the kite steering arrangement. The length aspect of the interconnecting members is adjusted by pivoting the control bar about the control bar pivot point and/or by displacement of the control bar pivot point relative the control bar support.

A control device for controlling a kite steering arrangement, including a base, a control bar support extending downward on the base, a control bar pivot point mounted displaceably about the control bar support, a pair of interconnecting members extending between opposing end regions of the control bar and the base upper the control bar support, a tensioning mechanism, a base pivot point, a base rotator for allowing rotation of the base about a vertical axis thereof, a manipulator that manipulates the base pivot point and base rotator, and a communicator, that communicates adjustment of the interconnecting members to the kite steering arrangement. The length aspect of the interconnecting members is adjusted by pivoting the control bar about the control bar pivot point and/or by displacement of the control bar pivot point relative the control bar support.

A method of loading a bladder into an outer envelope of an inflatable kite involves inserting the bladder through a valve opening in a portion of the outer envelope of the inflatable kite until a valve of the bladder is positioned in the valve opening. The preferred manner of inserting the bladder into position is accomplished by securing a line to a remote end of the bladder and using the line to draw the bladder through the valve opening.

A method of loading a bladder into an outer envelope of an inflatable kite involves inserting the bladder through a valve opening in a portion of the outer envelope of the inflatable kite until a valve of the bladder is positioned in the valve opening. The preferred manner of inserting the bladder into position is accomplished by securing a line to a remote end of the bladder and using the line to draw the bladder through the valve opening.

A kite for use in a system for extracting energy from the wind comprises: a wing (1) having a roll neutral point or zone when the kite is in flight; a tether (4) coupled directly or indirectly to the wing; a rigid spar arrangement (2); tensile couplings (3) from the spar arrangement to multiple locations on the wing; and an actuator linkage arrangement (6, 7, 10,11) having a length dimension that can be controllably adjusted. The spar arrangement has first and second attachments (8, 5) to the tether, at the first attachment (8) the spar arrangement is fixed to the tether at a location that is above a roll neutral point or zone of the wing, and at the second attachment (5) the spar arrangement is attached to the tether by the actuator arrangement (6, 7, 10, 11) at a location that is below the roll neutral point or zone of the wing.

A kite for use in a system for extracting energy from the wind comprises: a wing (1) having a roll neutral point or zone when the kite is in flight; a tether (4) coupled directly or indirectly to the wing; a rigid spar arrangement (2); tensile couplings (3) from the spar arrangement to multiple locations on the wing; and an actuator linkage arrangement (6, 7, 10,11) having a length dimension that can be controllably adjusted. The spar arrangement has first and second attachments (8, 5) to the tether, at the first attachment (8) the spar arrangement is fixed to the tether at a location that is above a roll neutral point or zone of the wing, and at the second attachment (5) the spar arrangement is attached to the tether by the actuator arrangement (6, 7, 10, 11) at a location that is below the roll neutral point or zone of the wing.

A kite comprises: a wing; upper and lower flaps located along at least a portion of an edge of the wing that forms the trailing edge of the wing when the wing is active; a controller configured to generate control signals; and an actuator arrangement configured to change orientations of the upper and lower flaps relative to the wing based on the control signals generated by the controller.

A kite comprises: a wing; upper and lower flaps located along at least a portion of an edge of the wing that forms the trailing edge of the wing when the wing is active; a controller configured to generate control signals; and an actuator arrangement configured to change orientations of the upper and lower flaps relative to the wing based on the control signals generated by the controller.