Dufour Aerospace says Aero2 hybrid-electric drone completed self-charging test flights
Swiss aircraft maker Dufour Aerospace said its Aero2 drone has completed an initial flight-test campaign with an in-house hybrid-electric powertrain that recharged the aircraft’s batteries in flight. The tests, conducted in Zurich, mark a significant step for a large unmanned aircraft designed to take off vertically, transition to forward flight, and operate with a serial hybrid system.
Dufour said Aero2 successfully moved from vertical takeoff into wing-borne forward flight while using the new propulsion architecture. During takeoff, the aircraft runs solely on high-performance batteries, a setup aimed at keeping operations quieter and more efficient. Once in forward flight, the hybrid system generates electricity on board to power the electric motors and recharge the batteries. That approach could sharply reduce turnaround times by removing the need for long ground charging sessions between missions.
The milestone also reflects the integration of several in-house systems that must operate together in a tilt-wing aircraft, including the flight control system, control software, power management system, and the broader powertrain. For an autonomous cargo and remote-sensing platform, reliable coordination between those systems is central to safe transition flight and repeatable operations. Dufour said the campaign validated critical aircraft systems and showed the platform is moving closer to mission-ready status for the roles it is targeting.
The current hybrid module uses gasoline, but the company said it is being adapted to accept sustainable aviation fuel and potentially kerosene. Dufour argues the aircraft’s overall carbon footprint and operating costs are still materially lower than those of helicopters and conventionally fuelled helicopter-style drones. That matters in logistics markets where operators need more range and availability than battery-only aircraft can deliver, but cannot absorb the cost structure of crewed rotorcraft.
Dufour said its initial focus for Aero2 is the delivery of critical cargo, including medical supplies and urgently needed spare parts, as well as support for remote-sensing missions. If the self-charging architecture proves dependable in operational use, Aero2 could help define a new middle ground between short-range electric drones and traditional helicopters, with implications for cargo transport, public safety, and advanced air mobility.