Australian hydrogen aircraft firm Stralis shuts down after successful taxi test

Stralis Aircraft, an Australian company developing zero-emission propulsion systems for aircraft, has shut down after four years of development, despite reaching a successful technical milestone.

On 29 July, the company carried out what it described as the first hydrogen-electric aircraft taxi test in the Southern Hemisphere, at Brisbane Airport. A modified Beechcraft Bonanza A36, nicknamed "Bonni," moved under its own power using electricity generated by hydrogen fuel cells. According to the company, the only byproduct was water vapour.

Stralis said it would cease operations shortly after the test. Its technology had been proven, the company said, but bringing a certified commercial aircraft to market remains a long and capital-intensive process.

For most airlines, Stralis said, the economic case for hydrogen currently does not outweigh the added costs, operational changes, and infrastructure investment required. Without enough demand from the airline industry, the company said, it proved impossible to raise the capital needed to carry the project forward.

The closure ends a hydrogen propulsion venture that had aimed to retrofit existing aircraft with fuel-cell-based electric systems as a path toward emissions-free regional flight. No further details were given about the fate of the aircraft or any remaining assets.