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 Solar Impulse 2 took off from Abu Dhabi in the United Arab
Emirates en route to the Omani capital Muscat at the start of a
five-month journey of 35,000 km (22,000 miles) organized to focus
the world's attention on sustainable energy.
"Solar Impulse wants to mobilize public enthusiasm in favor of
technologies that will allow decreased dependence on fossil fuels,
and induce positive emotions about renewable energies," said the
mission website, which maps out the plane's location and broadcasts
audio from the cockpit in real time.
The plane is only as heavy a family car (2,300 kg, 5,100 pounds) and
but has a wingspan as wide as the largest passenger airliner. Its
journey will span approximately 25 flight days broken up into 12
legs at speeds between 50 and 100 km (30 to 60 miles) per hour.
 Studies, design and construction took 12 years and a first version
of the craft rolled out in 2009 broke records for heights and
distances traveled by a manned solar plane.
The flight will make stopovers in India, Myanmar and China before
crossing the Pacific Ocean and flying across the United States and
southern Europe to arrive back in Abu Dhabi.
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"Miracles can be achieved with renewables such as solar power,"
Swiss pilot Bertrand Piccard, who also made the first non-stop
circumnavigation of the globe in a balloon in 1999, told Reuters in
January.
"We want to show we can fly day and night in an aircraft without a
drop of fuel," he said.
Companies involved in the project include Bayer AG, Solvay, ABB,
Schindler, Omega and Abu Dhabi's Masdar.
(Reporting By Noah Browning, Editing by William Maclean and Andrew
Heavens)
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