Sketch of isometric view of kite
1
2
3

Boxplane Structure

The boxplane structure with a truss-like airframe maximizes rigidity while minimizing weight. The two wings increase the power density, allowing economically viability even at small system sizes.

1
Control Surfaces

Each wing—top and bottom—has multiple control surfaces used to steer the kite.

2
Elevator

The empennage features passive stability means, allowing stable flight even in gusty winds.

3
Bracings

The truss-like structure is reinforced by diagonal bracings—a lightweight solution.

Aluminum Extruded Wings

The non-tapered design of our wings allows production by aluminum extrusion. This method is very cost-effective and highly scalable.

1
Aluminum Extrusion

The outer surface of the wings is made of extruded aluminum.

2
Multi Element Airfoil

This airfoil configuration generates a very high lift and thus enables a very high power density.

Sketch of cross-section of two-element wing
1
2
Sketch of isometric view of powertrain
1
2
Sketch of front view of powertrain
3

Powertrains and Rotors

Eight on-board electrical machines are used as motors during take-off and landing. The same machines are used as generators during figure eight flight.

1
Power Electronic
Control Unit

Power electronics control the electrical machines dynamically to stabilize the kite and generate power efficiently.

2
Electrical Machine

Rugged brushless DC motor/generator for reliability, longevity, and high efficiency.

3
Rotors

Fixed pitch, carbon fiber rotor blades which are optimized for maximum power generation at minimum noise.

Tether and Gimbal

A single point attachment enables full roll control freedom of the kite for optimum power harvesting efficiency and stability. The electro-mechanical tether consists of a Kevlar core acting as mechanical load carrier and electrical cables spiraling around the core.

1
Gimbal

Compact attachment point of tether with integrated sensors.

2
Tether

Fully redundant high voltage DC power transmission.

Isometric sketch of whole kite from the bottom
1
2

Agile and Rigorous Development

We verify design changes as quickly as possible with real-world tests, whose results feed our simulation models, our digital twins. For example, watch how we test our airframe inside a wind tunnel in the video below and read about it in our blog.

BLOG post
Rendering of Kitekraft system on field

Development Partners

We can rely on various industry experts for components of our systems, ranging from motion tracking hardware over extrusion manufacturing to
rotor manufacturing and energy storage systems.