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       Swiss Pilot Unveils Solar-Powered Plane for Planned Global Flight

   A Swiss pilot unveiled what could be a history-making aircraft
   Wednesday designed to fly around the globe powered only by the sun.
   The Solar Impulse 2 will begin test flights next month in preparation
   for a planned around-the-world trip next year.
   The plane has the same wingspan as a jumbo passenger jet. But only
   weighs about the same as a large car.
   That is because instead of heavy fuel tanks, Solar Impulse 2 is powered
   by more than 17,000 solar cells, grabbing energy from the sun and
   storing it in batteries.
   Pilot Andre Borschberg says he expects to take five days and five
   nights to travel around the world. But he says Solar Impulse 2 could
   stay in the air indefinitely.
   The plane is an updated model of a solar-powered aircraft built five
   years ago and flown across the United States last year.
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   [1]http://www.voanews.com/content/swiss-pilot-unveils-solarpowered-plan
   e-for-planned-global-flight/1890187.html

References

   1. http://www.voanews.com/content/swiss-pilot-unveils-solarpowered-plane-for-planned-global-flight/1890187.html