CyberKite

Year

2010

The idea

This autonomous kite is an intelligent, energy-efficient master of endurance.

The objective

The CyberKite demonstrates hybrid wing technology with integrated aerostatic lift and can securely hover even in conditions of calm.

Technical data

• CyberKite, 6 m2: 431 x 207 cm, 990 g
• CyberKite, 12 m2: 610 x 292 cm, 2200 g
• CyberKite, 24 m2: 862 x 414 cm, 4200 g
• Winding speed (tether lines): 1.6 m/s each, with 1000 N tractive force
• Winding speed (control lines): 4.0 m/s each, with 250 N tractive force
• Tension measurement sensors: 4
• Angle measurement sensors: 2

Operating principle

The autonomously flying CyberKite is available in three different wing sizes: 6, 12 and 24 square metres. The individual models have a prescribed flight path that is flexibly adapted to prevailing wind conditions. The kite is controlled by means of state-of-the-art servo, control and regulation technology. The system incorporates experience gained with the Stingray flight project in the 1990s.

Structure

The kites are designed as passive pneumatic structures based on ram pressure technology. The volume of air flowing past the wing is subjected to a differential pressure that ensures the necessary stability of the membrane structure.

Movement

The aerodynamic and aerostatic lift forces are directed through profiles on the underside and are diverted into a branched cable system; the wing is tethered to the actuator unit by four flight lines. A cable gear system adaptively adjusts the wing so that the CyberKite can fly straight ahead with its wing tips extended or perform turns with its wings curved.

Control

The control unit comprises four cable winches. The flight movements are initiated by means of the control lines, and the force is absorbed by the tether lines. This enables flexible and finely metered control and force regulation of the kite wing.

Material

CyberKite