French aerospace manufacturer Aura Aero has acquired the assets of fellow French hybrid-electric aircraft developer VoltAero, gaining a flight-proven demonstrator, patented propulsion technology and an industrial test base in Rochefort.
The deal hands Aura Aero years of hybrid-electric architecture experience spanning design, system integration, testing, flight operations and data analysis. Its most tangible element is the Cassio S, a hybrid-electric flying demonstrator that has completed more than 270 flights and covered around 15,500 miles since flight testing began in 2019.
Alongside the demonstrator, the acquisition transfers patents, engineering expertise, prototyping capability and part of VoltAero’s team. It is intended to accelerate Aura Aero’s electric and hybrid work, particularly its Integral and ERA programs, the latter a 19-seat hybrid-electric regional aircraft, and its Enbata drone project.
VoltAero had been developing a family of hybrid-electric aircraft built around the Cassio S, ranging from the four-seat Cassio 330 to the 10-seat Cassio 600, with power outputs matching each designation. The transaction marks a consolidation of France’s emerging electric-aviation sector, according to AeroTime.
The Rochefort facility adds more than 25,000ft² (2,322m²) of assembly, engineering, testing and industrial space with direct runway access. It gives Aura Aero a complementary base for prototyping, integrating and refining new propulsion architectures.
VoltAero, founded in 2017 by a lead engineer from the discontinued Airbus E-Fan electric aircraft project, had been searching for investment after a backer withdrew, according to Aviation International News and AeroTime. The company had been seeking funds to keep its Cassio program on track before agreeing to the asset sale.
“Acquiring VoltAero’s assets, and in particular the Cassio S, means integrating years of testing, data, and experience in hybrid-electric propulsion. This transaction serves as a catalyst for industrial, technological, and human growth. It strengthens our teams, expands our capabilities, and reaffirms our ambition: to build in France one of the world leaders in the aviation of tomorrow,” said Jérémy Caussade, president and co-founder of Aura Aero.
Aura Aero has framed the purchase as a contribution to French industrial sovereignty, consolidating expertise to design, certify and produce more fuel-efficient aircraft for civil, institutional and defense customers. The Rochefort base will also support development of its Enbata surveillance drone and continued electric-propulsion flight testing.
Based at Toulouse-Francazal Airport and employing nearly 250 people, Aura Aero holds design and production approvals and has raised €340 million (around US$365 million) to date, according to AeroTime.





