Hybrid-electric propulsion developer Ampaire hopes to obtain FAA approval for its Eco Caravan by the end of 2026 as it ramps up test flights in the United States. Ampaire this month flew its Electric EEL technology testbed aircraft, a Cessna 337 Skymaster retrofitted with its AMP-H570 AMP Drive hybrid-electric propulsion system, from Camarillo, Calif. (CMA), […]