Flying on liquid hydrogen: NLR and Zepp.solutions join forces

NLR takes an important step toward flying on liquid hydrogen, a promising development to make aviation more sustainable. To make this possible, the research institution has entered into an agreement with zepp.solutions to develop a fuel cell system. This collaboration is an important pillar in NLR's ambition to conduct a demo flight in 2026.

To enable this manned flight on liquid hydrogen in 2026, NLR will equip its electric-powered research aircraft, the Pipistrel Velis Electro, with a hydrogen propulsion line. A crucial element is the fuel cell system, which Zepp.solutions will develop in close cooperation with the research institution. Zepp will not only develop the fuel cell system but will also be involved in the integration into the Pipistrel and all testing activities up to the demo flight. This approach ensures that we make optimal use of each other's knowledge and expertise, increasing the chances of success of the demo flight.

Biggest challenges in aviation

Arjen Kloosterman, NLR project leader of the showcase: “NLR's goal with this project is to gain knowledge and experience in the development and integration of hydrogen components and drivelines for manned aviation. The biggest challenges, besides the physical integration, are the airworthiness and safety aspects associated with the introduction of hydrogen onboard of an aircraft. The entire trajectory up to the demo flight in 2026 provides us with valuable knowledge and insights for hydrogen technology integration and is thus a prelude to further developments and implementation of this technology in the aviation sector.”

Jan Bot, co-founder of zepp.solutions, concurs. “Our fuel cell technology has already proven itself in various sectors. We bring a lot of knowledge and experience when it comes to developing efficient and compact fuel cell systems. However, aviation does offer completely different challenges. This cooperation, and to be able to learn from each other in this way, is therefore incredibly valuable.”

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