Videos of Electric and Hybrid electric plane designs from Boeing, EADS and NASA
“A few years ago, the idea of flying an airplane on batteries was a joke,” says Marty Bradley, a principle investigator for advanced aircraft concepts at Boeing Research and Technology. While batteries and electric motors are efficient and quiet, batteries tend to be big and heavy, storing far less energy than liquid fuels.
Two things have changed. The amount of energy that batteries can store is steadily improving, and this looks likely to continue as they’re developed for use in portable electronics and electric vehicles, Bradley says. Meanwhile, the technologies needed to integrate batteries and electric motors with conventional engines are getting smaller, lighter, and more efficient. Siemens demonstrated an earlier version of its hybrid airplane in 2011, but it was too heavy to be practical. For the new plane, Siemens decreased the weight of the electric motor, power electronics, and gears by 100 kilograms to bring its cargo and passenger capacity up to the level of similarly sized small planes
Source: http://nextbigfuture.com/2014/02/videos-of-electric-and-hybrid-electric.html
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