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Feb 12, 2015

The upgraded solar-powered plane Solar Impulse 2 was unveiled in?

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    Feb 12, 2015

    On April 13, 2014 The upgraded solar-powered plane Solar Impulse 2 was unveiled in Switzerland at Payerne Air Force Base of Switzerland. The solar plane can fly around the world for five consecutive days without using any fuel. The maximum speed of the aircraft is 140 kilometers per hour (87 mph).

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