The biggest challenge; Solar Impulse & # 039: VIDEO?

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Solar Impulse two biggest challenge in office?

March 9, 2015 at 16:45 GMT clock Last updated

Expect both drivers in the record books fly, bypassing the planet in a solar airplane.

Bertrand Piccard and André Borschberg is alternately the Solar Impulse 2 to fly in his 5 months.

The longest stage of only one of them is solo nonstop for five days and nights fly across the Pacific between Nanjing, China, Hawaii, at a distance of 8500 kilometers (5270 miles).

BBC investigates the conditions and challenges to provide the drivers.

Video of Sara Barman made

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