H55 has delivered the first batch of its Adagio battery modules to Smartflyer, to be integrated into the SFX1 hybrid-electric aircraft currently in its Proof of Concept Demonstrator phase. The delivery moves the SFX1 program from component-level validation into full system integration and testing.
The Adagio modules have completed all regulator-required certification tests. Integration work will cover propulsion architecture, energy management and other aircraft systems ahead of a ground test campaign planned for this summer. First flight is targeted for autumn 2026.
The SFX1 is a hybrid-electric aircraft designed for pilot training, combining electric propulsion with a range extender architecture. H55 traces its origins to the Solar Impulse program and has accumulated more than 2,000 hours of fully electric flight with zero battery-related incidents, which the company says supports a certification-grade rather than merely compliance-focused approach to electric propulsion.
“Receiving the first Adagio battery modules from H55 is a major milestone for Smartflyer and a key enabler for the next phase of our development program…Together, we are taking concrete steps toward bringing efficient and sustainable aviation solutions to market,” said Rolf Stuber, CEO of Smartflyer.
Source: H55
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