Swiss electric aircraft developer Smartflyer has taken delivery of the first batch of Adagio battery modules from propulsion specialist H55, marking a significant step forward in the development of its SFX1 aircraft.
The delivery enables Smartflyer to move beyond individual component testing and into full system integration, as the SFX1 Proof of Concept Demonstrator programme enters an advanced stage of development.
For H55, the milestone signals the growing commercial momentum behind its certified electric propulsion technology, which has now been integrated into an active aircraft programme for the first time.
From lab to runway
The Adagio battery modules will be fitted into the SFX1 as engineers begin comprehensive system-level validation, covering propulsion architecture and energy management alongside other critical aircraft systems. The work forms part of preparations for an imminent ground test campaign.
H55 says the Adagio system has completed all regulator-required certification tests, satisfying safety and reliability standards necessary for use across a range of electric and hybrid-electric aircraft.
Ground testing of the SFX1 is planned for this summer, with a first flight targeted for autumn — keeping the programme on track with its development roadmap.
What the companies say
Rolf Stuber, Chief Executive of Smartflyer, said the delivery was “a major milestone” and praised H55’s technology as “not only innovative but ready for real-world application”.
Rob Solomon, Chief Executive of H55, said the collaboration with Smartflyer demonstrated how its battery and propulsion solutions were “moving from development into commercial application, enabling aircraft manufacturers to accelerate their path to flight”.