Ascendance’s VTOL Aircraft Enters Final Integration Phase

Ascendance’s prototype Atea hybrid-electric VTOL demonstrator has entered its final assembly phase at the company's facility in Toulouse. In July 2025, the French startup said it expected to complete the build of the full-scale aircraft by early 2026.

The fuselage was manufactured by aeronautical composite structure specialist Duquiene Group and engineered under the direction of Ascendance’s team. “This strategic milestone marks the culmination of years of design work, aerodynamic optimization, and industrialization,” the company explained.

With the airframe’s structure now complete, the company said it will start to integrate the propulsion elements, flight control system, and avionics. This includes the latest iteration of its proprietary distributed electric propulsion Sterna system, developed over the past five years. Alongside a Turbotech-supplied turbogenerator, Sterna pairs Safran electric motors with a thermal management system from French company Exoes.

The four-passenger Atea aircraft features a pair of ducted fans set into each fore and aft wing to provide vertical lift, augmented by nose and tail-mounted propellers. Wind tunnel testing of full-scale prototypes informed the final configuration.

Although Ascendance believes the start of final assembly “marks the transformation of an engineering program into a tangible industrial reality,” its hybrid-electric technology is also being offered to other aircraft developers. “Atea is not just an aircraft – it is the demonstrator of a complete architecture combining hybrid-electric propulsion, distributed propulsion, and fly-by-wire flight controls,” concluded Ascendance CEO Jean-Christophe Lambert.