Solar Impulse Flies Aircraft For Round-World Attempt

The Solar Impulse 2 (Si2) solar-powered round-the-world aircraft made its first flight from Payerne, Switzerland, on June 2. The 2-hr. 17-min. flight was made on stored battery power. A test of the solar power-generation system will be the next step, says Solar Impulse. The 236-ft. wingspan Si2 has...

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