Airborne Wind Energy
The energy
in the troposphere.
The power in the wind rises with the cube of its speed — so the stronger, steadier winds a few hundred metres up hold far more energy than anything near the ground. Airborne wind energy uses lightweight tethered wings to tap into that resource, capturing utility-scale power with a fraction of the material. It's the field KiteGen has helped pioneer for two decades.
The Physics
Why altitude multiplies power.
The power available in wind rises with the cube of its speed, so the faster flow at altitude carries far more energy. Wind power density is about 4× higher at 500–1 000 m than near the ground, and roughly 40× higher at 10 000 m. That single relationship — combined with the lower infrastructure requirements — is the entire economic case for going high.
Flying a wing crosswind — sweeping fast loops across the wind rather than drifting with it — follows the crosswind kite power equation: power scales with the square of the kite's aerodynamic efficiency (lift-to-drag, CL/CD) and the cube of wind speed. Squaring that efficiency lifts output by one to two orders of magnitude, so a lightweight kite races at many times the wind's speed and out-powers a far larger turbine.
The Resource
The wind that turbines can't touch.
Below 1 000 m, the ground drags on the wind, creating a turbulent boundary layer where speeds are low and gusty. Climb out of it and the flow becomes fast and near-constant — and a conventional turbine, capped by the height of its tower, can never get there.
| Parameter | Conventional turbine · 100–150 m | Airborne wind · 1 000–5 000 m |
|---|---|---|
| Wind speed | ~4–6 m/s, variable | 12–20 m/s, consistent |
| Energy density | Low — power scales with v³ | ~4× higher at 500–1 000 m, up to 40× at 10 000 m |
| Availability | Strong day/night variation | Near-constant geostrophic flow |
| Swept area | Fixed by rotor diameter | Structurally unconstrained |
| Embodied material | Hundreds of tonnes of steel | ~1% of a turbine's mass |
| Capacity factor | ~20–25% | Target 80% |
Why It Matters
Lighter, stronger, almost everywhere.
By moving the heavy machinery to the ground and sending only a wing aloft, airborne wind energy rewrites the economics and footprint of wind power.
Stronger, steadier wind
Access to the fast, near-constant flow above the boundary layer — winds no fixed tower can reach.
~1% of the material
A wing and tethers replace hundreds of tonnes of steel and concrete — roughly one percent of a turbine's embodied energy.
Unconstrained sweep
The "swept area" isn't fixed by a rotor — wings range across a wide volume of sky, always finding powerful wind and lifting the capacity factor toward 80%.
Compact footprint
No vast wake spacing between machines — a far smaller land or sea area for the same delivered energy.
Safe, simple recovery
Wings can be brought down quickly ahead of storms or for maintenance.
Higher energy return
Less material and more output mean a far better energy-return-on-investment — the Carousel targets $5/MWh.
The Largest Untapped Resource
Humanity's biggest power source is hiding in plain sight.
The winds of the high troposphere carry more energy than civilisation could ever use. The barrier has never been how much power is up there — it's been how to reach it. That is the problem airborne wind energy exists to solve.
See the principle at gigawatt scale.
The KiteGen Carousel turns everything on this page into a working power plant. Explore the machine, or talk to our team.