The Solar Impulse 2 landed in Spain morning after completing a 70-hour flight from New York in the first solo transatlantic crossing in a solar-powered airplane.
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Applause broke out as the experimental plane set down at Seville airport in southern Spain just before 7:40 am (0540 GMT) where a team was on the ground to welcome Swiss pilot and adventurer Bertrand Piccard, an AFP correspondent said, AFP reports.
"I can't take it in, it is so fantastic," Piccard told the plane's mission control centre in Monaco in remarks broadcast live on the Internet as the plane, which took off from New York on Monday, touched down.
"@bertrandpiccard lands in #Seville completing, in 70h, the 1st #Atlantic solar flight #futureisclean," the support team's official Twitter account said.
"A dream is coming true," the team had tweeted as the plane slowly approached its final destination early on Thursday after flying 6,272 kilometres (3,900 miles) across the Atlantic.
Solar Impulse, which has just completed 15th leg of its around-the-world trip, set out on March 9, 2015 in Abu Dhabi, and has flown across Asia and the Pacific to the United States with the sun as its only source of power.
Prince Albert of Monaco, a patron of the project who had spent the entire night at the control centre, congratulated Piccard on the journey: "Bravo, it was magnificent to see!" he said from the tiny state on the French Riviera.
"I arrived in the middle of an air show, it was absolutely extraordinary, that kept me awake!" Piccard told him in response, describing the acrobatic display put on by the Spanish air force as he came in to land.
The voyage marks the first solo transatlantic crossing powered only by sunlight and Piccard has been getting little sleep as he survives on short catnaps.
"After a long night of turbulence and little sleep, I see the first light of the day," Piccard tweeted earlier on Wednesday, later saying he had spotted a commercial plane flying past him.
Piccard had kept followers up to date with sightings of whales and icebergs, as well as occasional turbulence on the near three-day transatlantic journey.
Solar Impulse is being flown on its 35,400-kilometre trip round the world in stages, with Piccard and his Swiss compatriot Andre Borschberg taking turns at the controls of the single-seat plane.
Borschberg piloted a 6,437-kilometre flight between Japan and Hawaii that lasted 118 hours, smashing the previous record for the longest uninterrupted journey in aviation history. ■