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July 20, 2019 10:00 am

Largest Hybrid Electric Plane Set To Take Flight

Ampair, a Los Angeles clean tech company in my neck of the woods, is set to begin accepting orders for a hybrid electric aircraft at the EAA AirVenture airshow in Wisconsin next week. Dubbed the EEL, the aircraft is in fact a retrofit of a Cessna 337, an aircraft that has a forward-mounted prop engine that pulls and a rear-mounted prop engine that pushes. Ampair's retrofit will replace one of those internal combustion engines with an electric motor powered by batteries. ZDNet reports: Ampair believes hybrid power may be a stopgap, providing fuel savings while still retaining many of the benefits of an internal combustion drivetrain. "The Ampaire Electric EEL is the first step in bringing lower emissions, lower-operating costs, and quieter operations to general aviation through electrification," according to the company's CEO Kevin Noertker. "The original Cessna 337 provided great utility, and this hybrid electric conversion retains those advantages while reducing fuel cost and maintenance by about 50 percent." The EEL is now undergoing a 30 month test program, which began in June. One of the tests will be demonstrating reliable single-engine climbs on each powerplant. Ampair expects the aircraft to be certified by 2021. Ampair's EEL aircraft will seat four or six passengers. The company says the aircraft cost will be competitive with comparable piston twins.

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