Home Hybrid Aircraft VoltAero Cassio Set To Make First Hybrid Flight VoltAero Cassio Set To Make First Hybrid Flight 30 Jun 2020 | Electric AircraftHeadlineHybrid AircraftNews VoltAero Cassio Set To Make First Hybrid Flight VoltAero will bring its “Iron Bird” to Le Bourget while its Cessna 337-based flight test aircraft is prepared for its first hybrid flights.