Helium-filled balloon drones capture the world below 

By Julia Scott

German company, h-aero, markets lighter-than-air, helium-filled balloon drones that capture the world below using a high-tech computer on board. Offering a floating, silent view of the Earth, h-aero’s drone balloons are stirring interest globally.   

As a young child, h-aero co-founder, Csaba Singer, adored watching the animated series “The Adventures of Aladár Mézga”, about a quirky inventor who built a collapsible, inflatable spacecraft with a rubber membrane hull that he would fill up and set off on adventures in. “He pumps up his airship and flies every night with his dog, Blöki, into space,” recalls Singer.

Singer started programming at the age of six and picked up an understanding of computer languages and robotics. When he was 18, he attended university in Stuttgart and began to study aerospace engineering. 

From the beginning, Singer did more than draw inspiration from his favourite cartoon. The longer he studied and read, the more he became convinced that the future of humanity would eventually belong to what he terms “the third dimension”: the atmosphere between land and space. He was fascinated by the lighter-than-air airships and blimps that he believes we will inevitably build to experience more time in the third dimension as a species. 

“We are already at eight billion people. It will not take long before we are all living very close to each other, and we will fill up all the space that has been provided to us on Earth. And the biggest space, the biggest chance for us Homo Sapiens, is the third dimension,” he says. 

Like a silent puff of wind 

Nearly a century has passed since the era of passenger-carrying airships. And whilst numerous international startups are pursuing a crop of new-generation passenger airships (zeppelins, blimps and the like), Singer has focused on developing a highly original technology that is humbler at first glance but already has significant market fit. 

h-aero, the company he co-founded, has several helium-based levitating lighter-than-air balloon drones that are in popular use in commercial, personal and academic settings. These have already been deployed with distribution partners on every continent. Each model is constructed of ripstop nylon and carbon fibre, with a microelectronic navigation system adapted from aerospace and mobile communications. 

h-aero is an Innowwide grant recipient and has benefited from globalisation opportunities, thanks to Eureka’s Investment Readiness programme sponsoring attendance at international events, including exposure to buyers at the Singapore Week of Innovation and TeCHnology (SWITCH) in Singapore. 

Seen from below, h-aero’s balloon drones somewhat resemble a soft and friendly-looking flying saucer, gliding over the Earth on a mission to help scientists and other users observe life below. The system operates silently and can be made transparent to avoid disturbing wildlife during environmental monitoring. Its proprietary onboard computer vertically takes off, switches configurations and flies forward like an aeroplane, all whilst helium supported.

“What we have here is a highly versatile technology platform, which can be used in many different ways. For example, in indoor and outdoor events, education and forest and agriculture monitoring. It is also about climate protection,” says Singer, who filed for his first patent in 2004.

A levitating computer 

h-aero’s models have a highly unique design that offers many advantages. They are “levitating computers” (Singer’s term of art), designed so that a significantly larger proportion of battery energy can be used for payload and sensing tasks, versus conventional multirotor drones, which devote much of their energy to counteracting gravity. 

Current production systems carry a three-kilogram total payload with nine cubic meters of helium. The larger models have a five-hour flight time and can record hundreds of kilometres of data per day with an onboard camera.  h-aero is currently developing a solar-assisted version aimed at significantly extending endurance, with field demonstrations planned from 2026 onwards. 

For comparison, lightweight miniaturised satellites are sometimes used for similar purposes in low Earth orbit.  

However, satellite systems typically operate at much greater distances and are designed for large-scale coverage. h-aero’s systems complement these with high-resolution, flexible observations at lower altitudes, often between 1,000 and 2,000 metres above the observation area. 

h-aero’s scaling objectives are steadily advancing, supported by technological progress and growing international deployment. That is because the technology has only been conceivable within the last ten years, explains Singer, due to advances in carbon fibre, ripstop nylon from extreme sports and microelectronics from aerospace and mobile communications. 

“Within the specialised niche of lighter-than-air unmanned aerial vehicles, our systems achieve an exceptionally lightweight design compared to traditional aerospace structures. We focus entirely on this domain,” he says. 

Universities were among the first to understand the value proposition of h-aero’s balloon drones, thanks to the onboard combination of sensors and programmable software. Researchers have used the systems to detect early warning signs of climate stress or conduct research on bat populations to make sound environmental decisions on wind turbine installations. 

An ongoing, 3.7-million-euro project supported by the German Federal Ministry of Research, Technology and Space measures carbon dioxide outgassing from permafrost soils and peatlands. 

“We now have three larger grants that are all helping deploy our system across European forests to detect different changes in these complex territories, like changes when it comes to pest infestation, dry zones and so forth,” says h-aero Chief Financial Officer, Roland Zonai. 

Floating to international deployment 

h-aero unmanned aerial vehicles receive a lot of attention wherever they go. They are flying eye-catchers and have been used for advertising purposes at major indoor conventions. They can be rigged to transmit livestreams at all kinds of events, from concerts to sporting events to weddings. 

Singer and his team are a fixture at major airshows. Most recently, they achieved a special certification to allow an unmanned aerial vehicle to fly inside the iconic Marina Bay Sands Hotel in Singapore at the Singapore Week of Innovation and TeCHnology (SWITCH), which they attended as part of Eureka’s Investment Readiness programme.

No drone had ever been flown inside the Marina Bay Sands before; this was a world premiere. “Being part of the Eureka community and this investment readiness programme gives us a lot of opportunities to present the technology that we have globally,” says Zonai. 

Singer agrees. “We are a bootstrapping SME, and we need to generate revenue. The bigger the audience who can buy your system or your services, the bigger the chance that you survive and can bring the technology into existence.” 

h-aero has grown by staying lean. The company has operated with strong capital efficiency, investing approximately two million euro over the past ten years whilst maintaining a lean structure and securing funding through grants, crowdfunding and revenue. It has received two crowdfunding rounds, one five-digit round and a recent larger round. The current funding mix is from various grants, business angel investments and revenue. 

Looking forward, Singer’s next scaling phases target progressively larger carrier systems, from 15 kilograms to 75 kilograms, expanding the range of industrial and scientific applications.  

Singer has an h-aero balloon drone hanging out on the ceiling of his office. He named it Blöki, after the dog in the cartoon series he watched as a child. His long-term vision reflects a broader fascination with the atmosphere as an underutilised dimension for human activity.  

One day, we may once again be able to book an airship hotel at an altitude of 20,000 metres, floating above the clouds for weeks on end, surrounded by lush vegetation and dining in elegant environs.

For now, however, h-aero’s focus remains on practical, data-driven applications that contribute to environmental monitoring, research and sustainable infrastructure. 

“The future is not always about going higher and faster. It is increasingly about efficiency, sustainability and intelligent use of space,” says Singer.