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Solar aircraft make 26-hr flight, Aviation Week & Space Technology, 12 July 2010, p 16

In Switzerland, the Solar Impulse aircraft has completed a 26 hour flight powered by 12 000 solar cells and 880 lb of batteries at a maximum height of over 28 000 ft, at an average speed of 23 kt, and maximum ground speed of 68 kt. An improved prototype to fly across the Atlantic is under construction, and the round-the-world flight on solar power is scheduled for 2013.

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