“For Swiss pilot Bertrand Piccard, flying an experimental solar aircraft across America has been exhilarating, but perilous at times. His wispy, fuel-free aircraft, the Solar Impulse, is poised to take off Saturday on its final leg of a cross-country US tour aimed at showcasing the promise of clean energy. The plane’s American trip is just the latest in a series of groundbreaking flights across different parts of the world, including Europe and Africa. Piccard said the next plane will be 10 percent bigger, with more power, reliability, an auto-pilot function and a toilet so that pilots can make the four to six day long trips that will be part of its journey across the world in 2015.”
http://www.rawstory.com/rs/2013/07/05/swiss-pilot-cleared-to-finish-solar-plane-trek-across-u-s/
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