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Solar-powered plane lands in Hawaii after record 5-day flight from Japan

A plane powered by the sun's rays landed in Hawaii on Friday after a record-breaking five-day journey across the Pacific Ocean from Japan.

Pilot Andre Borschberg and his single-seat aircraft landed at Kalaeloa, a small airport outside Honolulu. His 120-hour voyage from Nagoya broke the record for the world's longest nonstop solo flight, his team said. The late U.S. adventurer Steve Fossett set the previous record of 76 hours when he flew a specially designed jet around the globe in 2006.

But Borschberg flew the Solar Impulse 2 without fuel. Instead, its wings were equipped with 17,000 solar cells that charged batteries. The plane ran on stored energy at night.

The plane's ideal flight speed is about 28 mph though that can double during daylight hours. The carbon-fiber aircraft weighs over 5,000 pounds, or about as much as a minivan.

Borschberg and his co-pilot Bertrand Piccard have been taking turns flying the plane on an around-the-world trip since taking off from Abu Dhabi in March. After Hawaii, it will head to Phoenix and then New York.

The project, which began in 2002 and is estimated to cost more than $100 million, is aimed at highlighting the importance of renewable energy and the spirit of innovation. Solar-powered air travel is not yet commercially practical, however, given the slow travel time, weather and weight constraints of the aircraft.

The plane is visiting Hawaii just as the state has embarked on its own ambitious clean energy project. Gov. David Ige last month signed legislation directing Hawaii's utilities to generate 100% of their electricity from renewable energy resources by 2045. The utilities get 21% of their power from renewable sources.

Borschberg took naps and practiced yoga to cope with the long hours.

"Yoga is a huge support for this flight above the Pacific: it positively affects my mood and mindset," he wrote in a tweet from the plane on Thursday.

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