H55’s Adagio battery systems will enable full aircraft validation work, with ground testing set for summer ahead of planned first flight in autumn.

The companies signed the partnership at Bern Airport, where H55’s certified aviation batteries were confirmed as the core system for Smartflyer’s SF-1.

Raytheon Technologies has achieved the successful first engine run of its regional hybrid-electric DHC Dash 8-100 flight demonstrator, marking a key milestone towards flight testing, targeted to begin in 2024.