VoltAero has unveiled its new HPU 210 hybrid-electric propulsion unit, designed for homebuilt, kit-built, and very light propeller-driven aircraft. Debuting at the France Air Expo in Lyon, the HPU 210 combines a high-performance thermal engine with a powerful electric motor to deliver a significant 40% power boost during demanding flight phases such as take-off and climb.
The HPU 210 is based on VoltAero’s proven hybrid-electric technology, originally developed for the company’s Cassio family of regional aircraft. This propulsion architecture has already accumulated over 185 flight hours and covered approximately 25,000 kilometres aboard VoltAero’s Cassio S flying testbed under a variety of operational conditions.
The power unit integrates a supercharged Kawasaki H2SX thermal engine, capable of producing 150 kW, with a 60-kW electric motor. The electric component provides additional thrust when required, enhancing take-off performance, obstacle clearance, and cruise efficiency. Derived from Kawasaki’s Ninja H2 SX sport motorcycle, the engine is adapted for aviation use, featuring electronic fuel injection and a projected time between overhaul (TBO) of 1,500 hours.
Designed for flexibility, the HPU 210 supports various fuel types, including AVGAS, E85 biofuel, and unleaded automotive petrol, helping to reduce both operating costs and environmental impact. Fuel consumption at cruise settings is reported as low as 38 litres per hour. The unit is managed via a single throttle, with the thermal engine covering up to 70% of power requirements and the electric motor providing supplementary boost when needed.
VoltAero will supply the HPU 210 as a turnkey kit, including all essential components such as the engine, motor, gearbox, and control systems. The power unit has already undergone bench testing at VoltAero’s partner facility, AKIRA, in southern France.
Production is set to commence at VoltAero’s Rochefort Airport facility in Nouvelle-Aquitaine, with first deliveries expected by late 2026. The HPU 210 marks a new chapter in sustainable aviation for small aircraft, offering a unique blend of efficiency, performance, and innovation.
