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The demonstrator in flight above trees and fields as the drone moves around it.

One machine, many missions.

An aerostat, a station that launches and recovers it, and software that runs many as one network. A new mission is a new payload.

In the air

Choose a part

Lifted by gas, held by a tether.

An envelope, a sail that keeps it pointed into the wind, a payload and a tether.

The demonstrator in flight, with its envelope, trailing sail, camera payload and tether visible above the landscape.

Holds a payload one to five kilometres up, with no engines.

An oblate envelope on a tether, with a sail that keeps it pointed into the wind.

On the ground

The station handles it. The software runs many as one.

  • The demonstrator and its tether over green fields, with the landscape extending to the horizon.Field test, Bengaluru

    Ground station

    04

    Launches, recovers, docks and services the aerostat.

    Designed to fail secure: if power is lost, it holds on.

  • Illustration: three aerostats spaced across a flat plain just after sunset, their tethers running to the ground.Illustration

    Fleet software

    05

    Runs many aerostats as one network.

    Health, weather, scheduling, recording and links to your systems.

  • Illustration: an aerostat above an industrial plant at dusk, with stacks, process columns and storage tanks below.Illustration

    Ground layer

    06

    Covers the site when weather grounds the fleet.

    A storm grounds neighbouring aerostats together, so each site keeps ground sensors.

How it works

Scroll through one flight

Launch. Hold. Work. Recover. Dock. Service. Repeat.

The station runs the whole loop, so nobody has to stand by to handle the aerostat.

The demonstrator rising above its launch station during a field test.
Launch · 6× speed01 / 06
  1. The demonstrator rising above its launch station during a field test.

    01

    Launch

    The station releases the aerostat and pays out tether in steps.

  2. The tethered demonstrator in flight above Bengaluru.

    02

    Hold

    It holds height and points into the wind.

  3. The tethered demonstrator in flight above Bengaluru.

    03

    Work

    The payload watches, listens, relays, keeps time or drops a test article.

  4. The demonstrator descending towards its ground station.

    04

    Recover

    For weather, a refill or the end of a test, the winch brings it home.

  5. The demonstrator approaching the dock at the end of a recovery.

    05

    Dock

    The station catches and secures it. No handling crew.

  6. The demonstrator secured at its station after recovery.

    06

    Service

    Health checks and a gas top-up, ready for the next flight.

Over 100 autonomous launch-and-recovery cycles completed during demonstrator field testing in Bengaluru.

Two sizes

One for a fixed site, one on a trailer.

One open payload interface.

Standard mounting, power, data, time and position. Partner and government payloads fit without changing the aerostat. We fly proven sensors from partners and handle the integration.

Safety

Explore the safety response

Built to fail secure.

When something goes wrong, the station holds the tether.

Choose a condition

An operator presses the emergency stop. The station stops winch motion and holds the tether.

Each condition leads to the same protective response.

  • 01

    The brake holds

    It needs power to release, so losing power holds the tether.

  • 02

    Motion stops

    A hardwired safety circuit stops winch motion without relying on software.

  • 03

    No automatic restart

    An operator restarts the system, deliberately.

Design behaviour. Winch bench tests include braking on link loss.

We test in stages, and trust no limit until a test has proved it.

The demonstrator beneath scattered clouds, with its tether extending towards the landscape below.

Designed for Indian weather.

Heat, monsoon, dust and sun are design inputs. Every flight logs wind, temperature and pressure, and our weather limits will come from that record.

Demonstrator flight test, Bengaluru

Results, as we measure them.

We publish each stage's results, with the conditions, on our blog.

Read the blogWhere we are