From Gizmodo:
"After six long years of planning, talking and hard work, the world finally got its first look at the 100% solar-powered Solar Impulse HB-SIA
on June 26th. This remarkable feat of engineering, with the wingspan of
a Boeing 747 but only the weight of an average family car, has over
12,000 solar cells powering four electric motors with a maximum power
of 10HP. The aircraft prototype is expected to take its first flights
before the end of the year."
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