Home Hybrid Aircraft Ampaire To Open Order Book for Hybrid-electric Airplane Ampaire To Open Order Book for Hybrid-electric Airplane 30 Jun 2020 | Electric AircraftHybrid AircraftNews Ampaire To Open Order Book for Hybrid-electric Airplane The California-based manufacturer of the Electric EEL, which is a retrofit of a Cessna 337 Skymaster, will begin accepting letters of intent at AirVenture.