TWO Swiss pilots hope to become the first people to circumnavigate the globe in an aeroplane powered only by the sun.
The experimental plane, named the Solar Impulse II, was presented in Switzerland's Payerne airforce base in the east of the country on Wednesday. Its inventors Bertrand Piccard and Andre Borschberg say the new model is bigger and better than the first prototype they flew across America five years ago (pictured below).
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The material used to make the wings weighs approximately one-third as much as printer paper. Consequently, the whole aeroplane weighs just 1,600kg, about the same as a family car.
Piccard says that the plane will fly slowly at 60 or 70 miles per hour to save energy. The around-the-world flight is anticipated to take around 25 days, which the pilots will spread across three or four months.
Along the way, the pilots will invite school students, universities and government representatives to view the plane in a bid to promote solar technology.
"We believe if we can demonstrate this in the air, where it is the most difficult to do, people will understand that they can also use the same technologies for their daily lives," Piccard told CBS News in an interview last year.
Initial testing of the Solar Impulse II will take place in May this year before the circumnavigation attempt between April and July 2015.
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