Longest Route To Date For Ampaire Electric EEL The Ampaire Electric EEL is a six-seat Cessna 337 twin-engine aircraft modified with an electric motor in the nose and traditional combustion engine in the rear. While it is not fully-electric it is a hybrid-electric aircraft. The aircraft got back in the news after it performed its longest flight to date which involved two-and-a-half-hours of flying covering 341 statute miles. "The ability to put innovative electric technologies into the air rapidly in order to assess and refine them", said General Manager, Ampaire, Doug Shane. "It central to Ampaire’s strategy to introduce low-emissions aircraft for regional airlines and charter operators within just a few years."