Cellsius

The H2-Sling needs wings for efficient hydrogen-powered flight, and its standard wings are insufficient for the project.

The e-Sling is intended to point toward a CO2-neutral future.

For two years (2020–2022), 20 ETH mechanical and electrical engineering students worked on developing the e-Sling as part of a focus project. The

to prove with the H2-Sling that hydrogen is a viable and practical alternative to conventional fuels in aviation.

The Liquid H2 project identifies extreme cold as its biggest challenge and stores liquid hydrogen, unlike the H2-Sling.

The project moved from an intensive development phase to practical testing on a test bench.

With the new tank system, pressure is not the problem; rather, it is the combination of extreme cold (-253 °C) and the overall weight requirements. A

The aircraft is nearing final construction, with its distinctive design as a remaining step.

The company presented its e-Sling project in a talk and at a booth during electrifly-in Grenchen 2020.

e-Sling looks forward to welcoming Smartflyer to Dübendorf for a return visit and wishes it success with its electric hybrid aircraft.

The company will be able to use a hangar at the Dübendorf Innovation Park starting in September.

e-Sling will carry out the project at Innovation Park Zurich. ETH Zurich is providing e-Sling and three other focus project teams with a converted hangar at

A new team of ten mechanical engineering students has started work and will be led by Julian Hofmann, a focus student from last year, as Team Lead

Episode 5 introduces Colin Merk, the simulation expert.

Episode 2 introduces Fabio De Carli, the technical director.

Episode 6 introduces Mario Camenzind, the wiring specialist.

Episode 1 introduces Maurice Kaulich, the team lead.

The company aims to develop a sustainable alternative to today's climate-damaging aviation.

Data protection

General Terms and Conditions with Customer Information

Swiss students build the H2-Sling, a hydrogen-powered aircraft that uses a 100 kW fuel cell and a MINK MH recirculation blower from Busch Vacuum Solutions. Equipped with two 2.6 kg hydrogen tanks, the aircraft can fly 200 km and is awaiting certification for a spring 2026 test flight.

Oct 2026indexbox.ioNews article

An ETH Zurich student team is preparing its H2-Sling aircraft for its first flight in Switzerland. The aircraft features a hydrogen fuel cell system and Type 4 tanks, and awaits Swiss regulatory clearance before its maiden flight can take place.

Aug 2026compositesworld.comNews article

A Swiss student team is preparing for the maiden flight of its hydrogen fuel-cell aircraft in Switzerland. The aircraft is described as having a 125-mile range.

Aug 2026AGNNews article

ETH Zurich’s student team prepares its **H2-Sling** hydrogen fuel-cell aircraft for its maiden flight in Payerne. The aircraft features a **100kW fuel cell system** and targets a **200km range**, aiming to demonstrate zero-emission aviation. Engineers conduct final ground tests before takeoff.

Aug 2026fuelcellsworks.comNews article