A Swiss Explorer Wants a Hydrogen Plane to Fly Around the World, And Shame AI Data Centers Into Going Green

Bertrand Piccard is betting he can pull off one of aviation’s most audacious stunts: fly a hydrogen-powered airplane around the world nonstop, without carbon emissions in flight, by 2029.

Piccard, a Swiss adventurer known for headline-grabbing feats including a nonstop balloon circumnavigation and a solar-powered round-the-world flight, says his new project, Climate Impulse, is designed to do more than prove a point in the sky. He wants the spectacle to pressure industries on the ground, from aviation to AI, into taking “clean tech” seriously, fast.

Test flights are slated for early 2027, with the around-the-world attempt targeted for 2029. The timeline is aggressive by aerospace standards, and Piccard is framing it as a technology demonstration, not a commercial airliner ready for passengers.

A nonstop hydrogen world flight by 2029, on a timeline that makes aerospace veterans nervous

Climate Impulse’s pitch is simple and cinematic: one aircraft, one continuous trip around the planet, no fuel stops, and no carbon emissions during flight. If it works, it would be a powerful proof-of-concept for hydrogen aviation, an idea that has long hovered between promising and impractical.

Piccard has been showcasing the aircraft publicly, including at VivaTech, a major European tech conference in Paris that functions a bit like a CES-meets-startup-expo for the EU innovation crowd. The strategy is deliberate: put a real object in front of investors, engineers, students, and policymakers, something more tangible than another slide deck.

But aviation is unforgiving. The early-2027 test campaign will have to validate not just propulsion, but endurance, thermal management, onboard systems, operational procedures, and crew training. In a project like this, success or failure can hinge on a single unglamorous engineering detail.

Piccard also knows the credibility question that follows hydrogen everywhere: where does the hydrogen come from? He emphasizes “green hydrogen” produced using renewable electricity, but scaling that supply chain globally is a different challenge than flying one high-profile mission.

The brutal physics problem: keeping liquid hydrogen at -423°F

The project’s most punishing constraint is fuel storage. Liquid hydrogen must be kept at about-423°F(that’s-253°C), a cryogenic requirement that forces extreme engineering, special tanks, heavy-duty insulation, careful thermal control, and constant attention to safety.

Jet fuel is comparatively easy to handle. Liquid hydrogen is not. Keeping it stable over long durations while an aircraft climbs, descends, and endures shifting outside temperatures and mechanical stress is a core design challenge, not a footnote.

Piccard is working with Raphaël Dinelli, a sailor and composite-materials engineer, exactly the kind of cross-disciplinary, extreme-environment background that fits a program where lightweight structures and reliability over many days can make or break the mission.

Safety is another unavoidable piece of the story. Hydrogen disperses quickly and requires sensors, redundancy, and strict procedures. Public demos can make the technology look deceptively straightforward; broad acceptance will depend on hard evidence that the system is robust.

Turning the cockpit into a classroom, because attention is the real fuel

Piccard is building a media and education campaign into the mission itself. He says he wants to speak live with schoolchildren from the cockpit during the flight, using the novelty of a real-time conversation mid-circumnavigation to pull students into discussions about energy, climate, and engineering.

It’s a blunt assessment of modern attention economics: tell people there’s a climate lecture and many tune out; offer a live call from a pilot circling the globe and doors open. Piccard’s approach is intentionally theatrical, technology as storytelling device.

He’s also leaning on partnerships, including one with Mohammed VI Polytechnic University in Morocco, as a way to connect with students beyond Europe. The symbolism is clear: energy growth, urbanization, and demographics are shifting the center of gravity of the climate and development debate, and Piccard wants his message to travel accordingly.

The risk is obvious, too. A spectacular cockpit call can inspire, but it doesn’t substitute for industrial investment, workforce training, or public policy. Piccard, trained as a psychiatrist, argues that optimism can mobilize action, but critics will judge the project on results, not vibes.

Solar Impulse’s bigger pitch: 1,600 “clean and profitable” innovations ready to scale

Climate Impulse sits inside the broader ecosystem of the Solar Impulse Foundation, which says it has labeled more than1,600eco-innovations as both environmentally beneficial and economically viable. Piccard’s core argument is that the world isn’t short on solutions, it’s short on deployment.

The label is meant to act as a filter in a noisy marketplace, elevating technologies that can cut emissions without collapsing business models. A stamp of approval doesn’t guarantee mass adoption, but it can open doors to government buyers, corporate partners, and investors, if the criteria are transparent and credible.

Piccard positions himself between doom-and-gloom fatalism and Silicon Valley-style techno-saviorism. It’s a savvy lane. Still, scaling any “profitable” climate solution often depends on infrastructure, regulations, financing, and supply chains, forces that don’t bend just because a prototype looks good on a conference floor.

Why Piccard is calling out AI data centers, and what hydrogen has to do with it

Piccard is widening his target beyond aviation to the energy appetite of AI and the data centers that power it. His point: “green tech” can’t just be cleaner gadgets; it has to confront the hidden infrastructure that’s driving electricity demand and carbon footprints.

The link to hydrogen is less direct than rhetorical. He’s trying to prove that a hard technology can become a public symbol, and then apply that same pressure to other sectors. With AI, he’s not arguing to shut it down. He’s arguing for efficiency: less energy-hungry architectures, smarter use of hardware, and more disciplined decisions about what’s worth running at scale.

Industry often counters that data centers are getting more efficient and grids are getting cleaner. Both can be true, while overall demand still rises fast enough to wipe out the gains. That turns the debate into a political question as much as a technical one: who gets the power, who pays for the infrastructure, and what uses society prioritizes.

If Climate Impulse succeeds, it could give hydrogen aviation a jolt of credibility, and give Piccard a louder megaphone to argue that the energy transition isn’t just about new inventions. It’s about what we choose to scale, what we choose to limit, and how quickly we’re willing to make those choices real.