Airborne Wind Energy - Powering Tomorrow, From Above

The sky is
the power plant.

Windra harvests wind at 1,000–10,000 feet above the ground — where it blows stronger, more consistently, and over every corner of the Earth. Clean energy. No land required.

Get early access
1,000–10,000
ft operating altitude
0 acres
land required
24/7
energy generation
$25/MWh
target cost of energy
Our mission

Bringing clean energy to every corner of the Earth — starting with the wind that's always blowing, high above us.

Windra is a clean-energy company unlocking the potential of high-altitude wind. We build airborne systems that capture stronger, steadier winds in the upper atmosphere — delivering affordable, reliable power anywhere it's needed. No land. No transmission battles. No disruption to what's below.

Why altitude changes everything

The higher you go,
the more power you get.

Wind power doesn't just increase with altitude — it grows dramatically. The math is on our side, and the numbers are striking.

At ground level, wind is messy. It fights trees, hills, and buildings. It comes and goes. It's only strong in certain parts of the world. Above 1,000 feet, everything changes.

Up there, wind blows faster, smoother, and more consistently — 24 hours a day, 365 days a year. It's available almost everywhere on Earth, not just along coastlines or open plains.

And here's the part that makes engineers excited: wind power grows with the cube of wind speed. Double the wind speed and you get eight times the power. Go from 1,000 ft to 10,000 ft and you're in a completely different league.

P = ½ · ρ · v3 · A · Cp
PPower — the electricity you actually get (in watts)
ρAir density — thins slightly at altitude, but the effect is small
v³Wind speed, cubed — the game-changer. 2× the speed = 8× the power
ASwept area — the size of the turbine blades
CpEfficiency — how well the turbine converts wind into electricity (max ~59%)

A simple example — in plain numbers

At 2,000 ft, wind averages about 50 mph.
At 10,000 ft, wind averages about 115 mph.
Air gets about 23% thinner at 10,000 ft.

Net result: the same turbine at 10,000 ft produces roughly 12× more power than at 2,000 ft.

That's not a small improvement. That's a different energy source entirely.

Relative wind power at different altitudes

Ground level1× (baseline)
1,000 ft2×
3,000 ft5×
6,000 ft8×
10,000 ft13×

Net power relative to ground level, factoring in air thinning at altitude.

Three reasons high altitude wins

💨

Faster and steadier wind

Above the turbulent lower atmosphere, wind flows smoothly and consistently. More reliable wind means more predictable power — day and night, year-round.

🌍

Available almost everywhere

Ground wind is regional — only certain geographies have strong enough resources. High-altitude wind is abundant across nearly the entire United States and most of the globe.

🚫

No land, no conflict

The resource is in the sky — untouched and uncontested. No land to buy, no utility fights, no disruption to what's below.

Where Windra deploys

High-altitude wind potential across the US

Windra's system works best in remote, low-density areas with strong upper-atmosphere winds. The Great Plains, Southwest, Gulf Coast, and Mountain West are exceptional. But unlike ground turbines, our reach is nearly nationwide.

NREL US Wind Resource Map at 80m Annual Average Wind Speed
Source: NREL / AWS Truepower — Annual Average Wind Speed at 80m. High-altitude wind (Windra operates at 1,000–10,000 ft) is even stronger and more uniform than shown here.
Exceptional >10.5 m/s — Great Plains, mountain ridges
Excellent 9–10.5 m/s — Northern plains, upper Midwest
Good 7.5–9 m/s — South, Pacific Northwest
Moderate 5.5–7.5 m/s — Most other regions

Map: NREL/AWS Truepower — US Annual Average Wind Speed at 80m. Windra operates at 1,000–10,000 ft where winds are significantly stronger and more consistent than surface measurements.

The technology

How it works

Years of prototyping. Wind tunnel testing. Advanced computational tools. A patented system. Here's the simple version.

01
It floats. A helium-filled airship lifts the entire system to 1,000–10,000 feet, where the wind never stops. Think of it like a powerful kite — tethered to the ground, floating in the sky.
02
It generates. Wind turbines on the airship spin continuously, converting high-altitude wind directly into electricity. No gearboxes, no complex machinery on the ground.
03
It delivers. Electricity travels down the tether cable directly to your home, farm, or local grid. A separate mechanical tether keeps the system anchored and controls altitude.
04
It thinks for itself. An AI-powered ground station watches wind conditions around the clock and automatically adjusts altitude to find the strongest wind. Fully autonomous — zero manual operation.
05
It scales. Start with one unit for a home or farm. Add more for a community or utility. Each unit you add multiplies the output — a real wind farm, in the sky.

The technology is protected by a US utility patent covering the full system — from the floating module and turbine configuration to the tethered power transfer and AI ground control.

Live demo flight · Watch now
See it in flight
Watch the actual prototype fly — altitude control, tether dynamics, and turbines spinning in real conditions.

By the numbers

Operating altitude1,000–10,000 ft
Power per unit1 kW – 1 MW
Daily output (one unit)100+ kWh/day
Target LCOE*$25 / MWh
Land requiredZero acres

*LCOE = Levelized Cost of Energy — the standard measure of the long-term cost to produce electricity.

Scale & impact

From one home to an entire grid

Each unit produces more than 100 kWh per day. Scale is built in — add more units, multiply the power.

Single unit · per day
100+ kWh

Enough to power 3–4 US single-family homes, or a small farm — continuously, day and night, regardless of weather.

Small cluster · per day
1 MWh

Ten units together power an entire rural community, a large commercial farm, or an off-grid industrial operation.

Airborne farm · per day
100+ MWh

A full-scale airborne wind farm delivers utility-scale power anywhere on Earth — no transmission corridors needed.

Power grows as you add units

1 unit
100+ kWh/day
5 units
500+ kWh/day
10 units
1 MWh/day
50 units
5 MWh/day
100+ units
10+ MWh/day
For investors

A once-in-a-generation clean energy opportunity

The world needs fundamentally new ways to generate clean energy. Windra opens a resource that has never been harvested — and the system to do it is ready.

Market

A massive untapped resource

The US Department of Energy projects renewables growing to 25% of electricity by 2035. High-altitude wind is the most consistent, least contested source in that mix — and essentially no one is harvesting it yet.

IP

Protected technology

A US utility patent covers the full system — the floating module, turbine configuration, tethered power transfer, and AI control. Multiple years of deep engineering and rigorous testing back it up.

Traction

Demonstrated. Not hypothetical.

Working prototypes have flown. Real power has been generated. Performance has been measured. This isn't a slide deck — watch the demo video and see for yourself.

Economics

Compelling cost of energy

Target Levelized Cost of Energy (LCOE) of $25/MWh — well below ground wind and most solar. No land to buy. Minimal civil infrastructure. The economics work at every scale.

“Think of ground-level wind farms as fishing near the shore. We go where the fish actually are. High-altitude wind is stronger, steadier, and completely untapped — and we've built the system to harvest it.”
“We're at an inflection point. The prototypes work. The data is compelling. We're looking for partners who see what we see in the sky.”
Where we are
Complete

Invention & patent

Full system designed, tested, and patent filed. Eight design generations refined through hands-on development.

Complete

Prototype flights

Live flight demonstrations completed. Real electricity generated. System performance validated under real-world conditions.

In progress

Full-scale field deployment

Grid-connected testing underway. Measuring performance across altitudes, wind conditions, and weather patterns.

Ahead

Commercial rollout

Pilot partnerships with utilities, rural communities, and farms. Scaling up to full airborne wind farms and long-term energy contracts.

For homes & communities

Energy independence — from the sky down

No new transmission lines. No land battles. No turbines blocking the horizon. Just clean power, delivered to the people who need it most.

🌿

Zero land footprint

The system floats above your land. Farms stay farms. Forests stay forests. Nothing below is displaced or disrupted.

Wildlife-safe by design

Operates far above bird and bat flight paths. Designed from the ground up with minimal ecological impact — not retrofitted as an afterthought.

⚡

Grid-independent

Connects directly to local microgrids. Rural communities don't need to wait for utility upgrades or transmission decisions that may never come.

Out of sight

High-altitude operation means zero visual impact on landscapes or viewsheds. Clean energy that's truly invisible from the ground.

🏠

Powers 3–4 homes per unit

One unit generates more than 100 kWh per day — enough for a family home, a small farm, or a rural small business, around the clock.

⛈

Disaster resilient

Tethered microgrids keep communities powered during outages. The system adjusts altitude automatically to handle severe weather.

“Like a kite that powers your farm. It floats above, harvests the wind that's always blowing strong up there, and sends clean electricity right down — without touching a single acre of your field.”
Get involved

We're looking for early believers.

Whether you're an investor, a rural community leader, or a homeowner ready for something different — we want to hear from you.

Contact us